Telecommunications installation and management system and method

Claim 2

A telecommunications system installation and management apparatus for controlling the operation of at least two telecommunications devices each of which have a database containing configuration data used to control the operation of the device stored therein and each of which use different protocols for external communication with the installation and management apparatus, comprising: a computer database system containing configuration data used to control the operation of the telecommunications devices; data input means for receiving commands from a user to control said computer database system and for receiving configuration data from said user to be stored in said computer database system; display means for displaying configuration data stored in said computer database system to said user; communication means connected with the at least two telecommunications devices for transferring data between the telecommunications devices and the telecommunications system installation and management apparatus; and control means operatively connected with said computer database system, said data input means, said display means, and said communication means, said control means operating to retrieve configuration data to be transferred to one of the at least two telecommunications devices from said computer database system, to generate a first telecommunications device control command by converting said configuration data into a protocol suitable for use with said one of the at least two telecommunications devices, and for transferring said first telecommunications device control command to said one of the at least two telecommunications devices using said communication means, whereby said configuration data stored in said database of at least one of said two telecommunications devices is modified.

Claim 3

The telecommunications system installation and management apparatus of claim 1 wherein said control means comprises a central processing unit of a personal computer and said computer database system comprises a database stored within a memory of said personal computer.

Claim 4

The telecommunications system installation and management apparatus of claim 2 wherein said data input means comprises a keyboard connected to said personal computer and said display means comprises a video display terminal connected with said personal computer.

Claim 5

The telecommunications system installation and management apparatus of claim 2 wherein said control means further comprises a computer program stored within said memory of said personal computer, said computer program operating to generate said first telecommunications device control command by converting said configuration data into a protocol suitable for use with said one of the at least two telecommunications devices.

Claim 6

The telecommunications system installation and management apparatus of claim 1 wherein each of the at least two telecommunications devices is one of a private branch exchange system, a call accounting system, and a voice messaging system.

Claim 7

The telecommunications system installation and management apparatus of claim 5 wherein each of the at least two telecommunications devices is a private branch exchange system.

Claim 8

The telecommunications system installation and management apparatus of claim 6 wherein each of the at least two private branch exchange systems is made by different manufacturers.

Claim 9

The telecommunications system installation and management apparatus of claim 1 wherein the at least two telecommunications devices include at least one private branch exchange system and at least one of a call accounting system and a voice messaging system.

Claim 10

The telecommunications system installation and management apparatus of claim 8 wherein said at least one private branch exchange system and said at least one of a call accounting system and a voice messaging system are made by different manufacturers.

Claim 11

The telecommunications system installation and management apparatus of claim 1 wherein each of the at least two telecommunications devices is one of a telecommunications switching system, a call accounting system, a voice messaging system, a router, a bridge, a data switch, a concentrator and a hub.

Claim 12

The telecommunications system installation and management apparatus of claim 1 wherein said communication means comprises a modem.

Claim 13

The telecommunications system installation and management apparatus of claim 1 wherein said communication means comprises one of a serial interface cable, wireless communication system, network interface card, FDDI, CDDI, a synchronous transfer mode adaptor, satellite downlink, and ISDN terminal adaptor.

Claim 14

The telecommunications system installation and management apparatus of claim 1 wherein said control means further operates to receive an acknowledgement from said one of the at least two telecommunications devices using said communication means, said acknowledgement confirming that said first telecommunications device control command was received and processed by said one of the at least two telecommunications devices.

Claim 15

The telecommunications system installation and management apparatus of claim 1 wherein said control means further operates to generate a second telecommunications device control command by converting said configuration data into a protocol suitable for communication with another of said at least two telecommunications devices and to transfer said second telecommunications device control command to said another of said at least two telecommunications devices using said communication means.

Claim 16

The telecommunications system installation and management apparatus of claim 14 wherein said one of the at least two telecommunications devices is a private branch exchange telephone switch and said another of the at least two telecommunication devices is one of a call accounting system and voice messaging system.

Claim 17

The telecommunications system installation and management apparatus of claim 15 wherein said one of the at least two telecommunications devices and said another of the at least two telecommunication devices are made by different manufacturers.

Claim 18

The telecommunications system installation and management apparatus of claim 1 wherein said communication means is permanently connected with the at least two telecommunications devices.

Claim 19

The apparatus of claim 1 wherein said computer database system and said control means comprise at least a portion of one of the at least two telecommunications devices.

Claim 20

The apparatus of claim 1 wherein said control means further functions to detect a change in said configuration data in said computer database system and operates to retrieve said configuration data to be transferred to one of the at least two telecommunications devices from said computer database system in response to said change.

Claim 21

The apparatus of claim 1 wherein said computer database system includes a plurality of data records containing configuration data used to control the operation of the at least two telecommunications devices, and said control means further operates to store said configuration data received from said user in one of said plurality of records and to modify at least one other of said plurality of records in response to said configuration data received from said user.

Claim 22

The apparatus of claim 1 wherein said control means further operates to synchronize the configuration data stored in the computer database system of the apparatus with the configuration data stored in one of the at least two telecommunications devices.

Claim 23

The telecommunications system installation and management apparatus of claim 1 wherein said communication means is operatively connected with said one of the at least two telecommunications devices only when said control means operates to transfer said first telecommunications device control command to said one of the at least two telecommunications devices.

Claim 28

The method of claim 24 wherein said device different from said at least two telecommunications devices comprises a personal computer and a database stored within a memory of said personal computer.

Claim 29

The method of claim 24 wherein each of the at least two telecommunications devices is one of a private branch exchange system, a call accounting system, and a voice messaging system.

Claim 30

The method of claim 26 wherein each of the at least two telecommunications devices is a private branch exchange system.

Claim 31

The method of claim 27 wherein each of the at least two private branch exchange systems is made by different manufacturers.

Claim 32

The method of claim 24 wherein the at least two telecommunications devices include at least one private branch exchange system and at least one of a call accounting system and a voice messaging system.

Claim 33

The method of claim 29 wherein said at least one private branch exchange system and said at least one of a call accounting system and a voice messaging system are made by different manufacturers.

Claim 34

The method of claim 24 further comprising the step of receiving an acknowledgement from said one of the at least two telecommunications devices, said acknowledgement confirming that said first telecommunications device control command was received and processed by said one of the at least two telecommunications devices.

Claim 35

The method of claim 24 further comprising the steps of: generating a second telecommunications device control command by converting said modified information into a protocol suitable for communication with another of said at least two telecommunications devices; and transferring said second telecommunications device control command to said another of said at least two telecommunications devices.

Claim 36

The method of claim 24 further comprising the steps of: retrieving configuration data stored in said database of at least one of said two telecommunications devices; converting said retrieved configuration data into information indicative of said configuration data suitable for storage in said device different from said at least two telecommunications devices; and storing said information indicative of said configuration data into said database in said device different from said at least two telecommunications devices.

Claim 37

A telecommunications system installation and management apparatus for controlling the operation of at least one telecommunications device having a database containing configuration data used to control the operation of the device stored therein and operatively connected through a communications path with the apparatus, comprising: a computer database including a plurality of data records containing configuration data used to control the operation of the at least one telecommunications device; data input means for receiving configuration data from a user to be stored in one of said plurality of data records in said computer database; and control means operatively connected with said computer database and said data input means, said control means operating to store said received configuration data in said one of said plurality of records and to modify at least one other of said plurality of records in response to said received configuration data, wherein said control means further operates to generate a first telecommunications device control command by converting said received configuration data into a protocol suitable for use with said at least one telecommunications device, and for transferring said first telecommunications device control command to said at least one telecommunications device using the communications path, to access said at least one other of said plurality of records to retrieve modified configuration data therefrom, to generate a second telecommunications device control command by converting said modified configuration data into a protocol suitable for use with said at least one telecommunications device, and for transferring said second telecommunications device control command to said at least one telecommunications device using the communications path, and wherein said at least one telecommunications device comprises a PBX telephone switch and a call accounting system, and said first telecommunications device control command is transferred to said PBX telephone switch and said second telecommunications device control command is transferred to said call accounting system.

Claim 38

A telecommunications system installation and management apparatus for controlling the operation of at least one telecommunications device having a database containing configuration data used to control the operation of the device stored therein and operatively connected through a communications path with the apparatus, comprising: a computer database including a plurality of data records containing configuration data used to control the operation of the at least one telecommunications device; data input means for receiving configuration data from a user to be stored in one of said plurality of data records in said computer database; and control means operatively connected with said computer database and said data input means, said control means operating to store said received configuration data in said one of said plurality of records and to modify at least one other of said plurality of records in response to said received configuration data, wherein said control means further operates to generate a first telecommunications device control command by converting said received configuration data into a protocol suitable for use with said at least one telecommunications device, and for transferring said first telecommunications device control command to said at least one telecommunications device using the communications path, to access said at least one other of said plurality of records to retrieve modified configuration data therefrom, to generate a second telecommunications device control command by converting said modified configuration data into a protocol suitable for use with said at least one telecommunications device, and for transferring said second telecommunications device control command to said at least one telecommunications device using the communications path, and wherein said at least one telecommunications device comprises a PBX telephone switch and a call accounting system, and said first telecommunications device control command is transferred to said PBX telephone switch and said second telecommunications device control command is transferred to said call accounting system.

Claim 39

The apparatus of claim 34 wherein said computer database system and said control means comprise at least a portion of one of the at least two telecommunications devices.

Claim 40

A telecommunications system installation and management apparatus for controlling the operation of at least one telecommunications device having a database containing configuration data used to control the operation of the device stored therein and operatively connected through a communications path with the apparatus, comprising: a computer database including a plurality of data records containing configuration data used to control the operation of the at least one telecommunications device; data input means for receiving configuration data from a user to be stored in one of said plurality of data records in said computer database; and control means operatively connected with said computer database and said data input means, said control means operating to store said received configuration data in said one of said plurality of records and to modify at least one other of said plurality of records in response to said received configuration data, wherein said control means further operates to generate a first telecommunications device control command by converting said received configuration data into a protocol suitable for use with said at least one telecommunications device, and for transferring said first telecommunications device control command to said at least one telecommunications device using the communications path, to access said at least one other of said plurality of records to retrieve modified configuration data therefrom, to generate a second telecommunications device control command by converting said modified configuration data into a protocol suitable for use with said at least one telecommunications device, and for transferring said second telecommunications device control command to said at least one telecommunications device using the communications path, and wherein said at least one telecommunications device comprises a PBX telephone switch and a voice messaging system, and said first telecommunications device control command is transferred to said PBX telephone switch and said second telecommunications device control command is transferred to said voice messaging system.

Claim 41

A telecommunications system installation and management apparatus for controlling the operation of at least one telecommunications device having a database containing configuration data used to control the operation of the device stored therein and operatively connected through a communications path with the apparatus, comprising: a computer database including a plurality of data records containing configuration data used to control the operation of the at least one telecommunications device; data input means for receiving configuration data from a user to be stored in one of said plurality of data records in said computer database; and control means operatively connected with said computer database and said data input means, said control means operating to store said received configuration data in said one of said plurality of records and to modify at least one other of said plurality of records in response to said received configuration data, wherein said control means further operates to generate a first telecommunications device control command by converting said received configuration data into a protocol suitable for use with said at least one telecommunications device, and for transferring said first telecommunications device control command to said at least one telecommunications device using the communications path, to access said at least one other of said plurality of records to retrieve modified configuration data therefrom, to generate a second telecommunications device control command by converting said modified configuration data into a protocol suitable for use with said at least one telecommunications device, and for transferring said second telecommunications device control command to said at least one telecommunications device using the communications path, and wherein said at least one telecommunications device comprises a PBX telephone switch and a voice messaging system, and said first telecommunications device control command is transferred to said PBX telephone switch and said second telecommunications device control command is transferred to said voice messaging system.

Claim 42

The apparatus of claim 36 wherein said computer database system and said control means comprise at least a portion of one of the at least two telecommunications devices.

Claim 43

A telecommunications system installation and management apparatus for controlling the operation of at least one telecommunications device having a database containing configuration data used to control the operation of the device stored therein and operatively connected through a communications path with the apparatus, comprising: a computer database including a plurality of data records containing configuration data used to control the operation of the at least one telecommunications device; data input means for receiving configuration data from a user to be stored in one of said plurality of data records in said computer database; and control means operatively connected with said computer database and said data input means, said control means operating to store said received configuration data in said one of said plurality of records and to modify at least one other of said plurality of records in response to said received configuration data, wherein said control means further operates to generate a first telecommunications device control command by converting said received configuration data into a protocol suitable for use with said at least one telecommunications device, and for transferring said first telecommunications device control command to said at least one telecommunications device using the communications path, to access said at least one other of said plurality of records to retrieve modified configuration data therefrom, to generate a second telecommunications device control command by converting said modified configuration data into a protocol suitable for use with said at least one telecommunications device, and for transferring said second telecommunications device control command to said at least one telecommunications device using the communications path, and wherein said at least one telecommunications device consists of a PBX telephone switch.

Claim 44

A telecommunications system installation and management apparatus for controlling the operation of at least one telecommunications device having a database containing configuration data used to control the operation of the device stored therein and operatively connected through a communications path with the apparatus, comprising: a computer database including a plurality of data records containing configuration data used to control the operation of the at least one telecommunications device; data input means for receiving configuration data from a user to be stored in one of said plurality of data records in said computer database; and control means operatively connected with said computer database and said data input means, said control means operating to store said received configuration data in said one of said plurality of records and to modify at least one other of said plurality of records in response to said received configuration data, wherein said control means further operates to generate a first telecommunications device control command by converting said received configuration data into a protocol suitable for use with said at least one telecommunications device, and for transferring said first telecommunications device control command to said at least one telecommunications device using the communications path, to access said at least one other of said plurality of records to retrieve modified configuration data therefrom, to generate a second telecommunications device control command by converting said modified configuration data into a protocol suitable for use with said at least one telecommunications device, and for transferring said second telecommunications device control command to said at least one telecommunications device using the communications path, and wherein said at least one telecommunications device consists of a PBX telephone switch.

Claim 45

The apparatus of claim 38 wherein said computer database system and said control means comprise at least a portion of one of the at least two telecommunications devices.

Claim 46

A telecommunications system installation and management apparatus for controlling the operation of at least two telecommunications devices operatively connected through a communications path with the apparatus, comprising: a computer database including a plurality of data records containing configuration data used to control the operation of the at least two telecommunications devices; and control means operatively connected with said computer database, said control means operating to access said computer database to retrieve said configuration data and further operating to (a) format said configuration data into first formatted configuration data suitable for a first one of said at least two telecommunications devices, to generate a first telecommunications device control command by converting said first formatted configuration data into a protocol suitable for use with said first one of said at least two telecommunications devices, and to transfer said first telecommunications device control command to said first one of said at least two telecommunications devices, using the communications path; and (b) format said configuration data into second formatted configuration data suitable for a second one of said at least two telecommunications devices, to generate a second telecommunications device control command by converting said second formatted configuration data into a protocol suitable for use with said second one of said at least two telecommunications devices, and to transfer said second telecommunications device control command to said second one of said at least two telecommunications devices, using the communications path, wherein said first one of said at least two telecommunications devices is a PBX telephone switch and said second one of said at least two telecommunication devices is a call accounting system.

Claim 47

A telecommunications system installation and management apparatus for controlling the operation of at least two telecommunications devices operatively connected through a communications path with the apparatus, comprising: a computer database including a plurality of data records containing configuration data used to control the operation of the at least two telecommunications devices; and control means operatively connected with said computer database, said control means operating to access said computer database to retrieve said configuration data and further operating to (a) format said configuration data into first formatted configuration data suitable for a first one of said at least two telecommunications devices, to generate a first telecommunications device control command by converting said first formatted configuration data into a protocol suitable for use with said first one of said at least two telecommunications devices, and to transfer said first telecommunications device control command to said first one of said at least two telecommunications devices, using the communications path; and (b) format said configuration data into second formatted configuration data suitable for a second one of said at least two telecommunications devices, to generate a second telecommunications device control command by converting said second formatted configuration data into a protocol suitable for use with said second one of said at least two telecommunications devices, and to transfer said second telecommunications device control command to said second one of said at least two telecommunications devices, using the communications path, wherein said first one of said at least two telecommunications devices is a PBX telephone switch and said second one of said at least two telecommunication devices is a call accounting system.

Claim 48

The telecommunications system installation and management apparatus of claim 40 wherein said configuration data is one of a user name and an extension number.

Claim 49

The apparatus of claim 40 wherein said computer database system and said control means comprise at least a portion of one of the at least two telecommunications devices.

Claim 50

A telecommunications system installation and management apparatus for controlling the operation of at least two telecommunications devices operatively connected through a communications path with the apparatus, comprising: a computer database including a plurality of data records containing configuration data used to control the operation of the at least two telecommunications devices; and control means operatively connected with said computer database, said control means operating to access said computer database to retrieve said configuration data and further operating to (a) format said configuration data into first formatted configuration data suitable for a first one of said at least two telecommunications devices, to generate a first telecommunications device control command by converting said first formatted configuration data into a protocol suitable for use with said first one of said at least two telecommunications devices, and to transfer said first telecommunications device control command to said first one of said at least two telecommunications devices, using the communications path; and (b) format said configuration data into second formatted configuration data suitable for a second one of said at least two telecommunications devices, to generate a second telecommunications device control command by converting said second formatted configuration data into a protocol suitable for use with said second one of said at least two telecommunications devices, and to transfer said second telecommunications device control command to said second one of said at least two telecommunications devices, using the communications path, wherein said first one of said at least two telecommunications devices is a PBX telephone switch and said second one of said at least two telecommunication devices is a voice messaging system.

Claim 51

A telecommunications system installation and management apparatus for controlling the operation of at least two telecommunications devices operatively connected through a communications path with the apparatus, comprising: a computer database including a plurality of data records containing configuration data used to control the operation of the at least two telecommunications devices; and control means operatively connected with said computer database, said control means operating to access said computer database to retrieve said configuration data and further operating to (a) format said configuration data into first formatted configuration data suitable for a first one of said at least two telecommunications devices, to generate a first telecommunications device control command by converting said first formatted configuration data into a protocol suitable for use with said first one of said at least two telecommunications devices, and to transfer said first telecommunications device control command to said first one of said at least two telecommunications devices, using the communications path; and (b) format said configuration data into second formatted configuration data suitable for a second one of said at least two telecommunications devices, to generate a second telecommunications device control command by converting said second formatted configuration data into a protocol suitable for use with said second one of said at least two telecommunications devices, and to transfer said second telecommunications device control command to said second one of said at least two telecommunications devices, using the communications path, wherein said first one of said at least two telecommunications devices is a PBX telephone switch and said second one of said at least two telecommunication devices is a voice messaging system.

Claim 52

The telecommunications system installation and management apparatus of claim 43 wherein said configuration data is one of a user name and an extension number.

Claim 53

The apparatus of claim 43 wherein said computer database system and said control means comprise at least a portion of one of the at least two telecommunications devices.

Claim 54

A telecommunications system installation and management apparatus for controlling the operation of at least one telecommunications device having a database containing configuration data used to control the operation of the device stored therein and operatively connected through a communications path with the apparatus, comprising: a computer database including a plurality of data records containing configuration data used to control the operation of the at least one telecommunications device; data input means for receiving configuration data from a user to be stored in one of said plurality of data records in said computer database; and control means operatively connected with said computer database and said data input means, said control means operating to store said received configuration data in said one of said plurality of records and to modify at least one other of said plurality of records in response to said received configuration data, wherein said control means further functions to detect a change in said configuration data in said computer database system and operates to retrieve said configuration data to be transferred to one of the at least two telecommunications devices from said computer database system in response to said change.

Claim 55

A telecommunications system installation and management apparatus for controlling the operation of at least one telecommunications device having a database containing configuration data used to control the operation of the device stored therein and operatively connected through a communications path with the apparatus, comprising: a computer database including a plurality of data records containing configuration data used to control the operation of the at least one telecommunications device; data input means for receiving configuration data from a user to be stored in one of said plurality of data records in said computer database; and control means operatively connected with said computer database and said data input means, said control means operating to store said received configuration data in said one of said plurality of records and to modify at least one other of said plurality of records in response to said received configuration data, wherein said control means further functions to detect a change in said configuration data in said computer database system and operates to retrieve said configuration data to be transferred to one of the at least two telecommunications devices from said computer database system in response to said change.

Claim 56

The apparatus of claim 46 wherein said computer database system and said control means comprise at least a portion of one of the at least two telecommunications devices.

Claim 57

The telecommunications system installation and management apparatus of claim 46 wherein said at least one telecommunications device consists of a call accounting system.

Claim 58

The telecommunications system installation and management apparatus of claim 46 wherein said at least one telecommunications device consists of a voice messaging system.

Claim 59

The telecommunications system installation and management apparatus of claim 46 wherein said control means further operates to generate a first telecommunications device control command by converting said received configuration data into a protocol suitable for use with said at least one telecommunications device, and for transferring said first telecommunications device control command to said at least one telecommunications device using the communications path.

Claim 60

The telecommunications system installation and management apparatus of claim 50 wherein said control means further operates to access said at least one other of said plurality of records to retrieve modified configuration data therefrom, to generate a second telecommunications device control command by converting said modified configuration data into a protocol suitable for use with said at least one telecommunications device, and for transferring said second telecommunications device control command to said at least one telecommunications device using the communications path.

Claim 61

The telecommunications system installation and management apparatus of claim 51 wherein said at least one telecommunications device comprises a PBX telephone switch and a call accounting system, and said first telecommunications device control command is transferred to said PBX telephone switch and said second telecommunications device control command is transferred to said call accounting system.

Claim 62

The telecommunications system installation and management apparatus of claim 51 wherein said at least one telecommunications device comprises a PBX telephone switch and a voice messaging system, and said first telecommunications device control command is transferred to said PBX telephone switch and said second telecommunications device control command is transferred to said voice messaging system.

Claim 63

The telecommunications system installation and management apparatus of claim 51 wherein said at least one telecommunications device consists of a PBX telephone switch.

Claim 64

A telecommunications system installation and management apparatus for controlling the operation of at least one telecommunications device having a database containing configuration data used to control the operation of the device stored therein and operatively connected through a communications path with the apparatus, comprising: a computer database including a plurality of data records containing configuration data used to control the operation of the at least one telecommunications device; data input means for receiving configuration data from a user to be stored in one of said plurality of data records in said computer database; and control means operatively connected with said computer database and said data input means, said control means operating to store said received configuration data in said one of said plurality of records and to modify at least one other of said plurality of records in response to said received configuration data, wherein said control means further operates to synchronize the configuration data stored within the computer database of the apparatus with the configuration data stored in said at least one telecommunications device.

Claim 65

A telecommunications system installation and management apparatus for controlling the operation of at least one telecommunications device having a database containing configuration data used to control the operation of the device stored therein and operatively connected through a communications path with the apparatus, comprising: a computer database including a plurality of data records containing configuration data used to control the operation of the at least one telecommunications device; data input means for receiving configuration data from a user to be stored in one of said plurality of data records in said computer database; and control means operatively connected with said computer database and said data input means, said control means operating to store said received configuration data in said one of said plurality of records and to modify at least one other of said plurality of records in response to said received configuration data, wherein said control means further operates to synchronize the configuration data stored within the computer database of the apparatus with the configuration data stored in said at least one telecommunications device.

Claim 66

The apparatus of claim 55 wherein said computer database system and said control means comprise at least a portion of one of the at least two telecommunications devices.

Claim 67

The telecommunications system installation and management apparatus of claim 55 wherein said at least one telecommunications device consists of a call accounting system.

Claim 68

The telecommunications system installation and management apparatus of claim 55 wherein said at least one telecommunications device consists of a voice messaging system.

Claim 69

The telecommunications system installation and management apparatus of claim 55 wherein said control means further operates to generate a first telecommunications device control command by converting said received configuration data into a protocol suitable for use with said at least one telecommunications device, and for transferring said first telecommunications device control command to said at least one telecommunications device using the communications path.

Claim 70

The telecommunications system installation and management apparatus of claim 59 wherein said control means further operates to access said at least one other of said plurality of records to retrieve modified configuration data therefrom, to generate a second telecommunications device control command by converting said modified configuration data into a protocol suitable for use with said at least one telecommunications device, and for transferring said second telecommunications device control command to said at least one telecommunications device using the communications path.

Claim 71

The telecommunications system installation and management apparatus of claim 60 wherein said at least one telecommunications device comprises a PBX telephone switch and a call accounting system, and said first telecommunications device control command is transferred to said PBX telephone switch and said second telecommunications device control command is transferred to said call accounting system.

Claim 72

The telecommunications system installation and management apparatus of claim 60 wherein said at least one telecommunications device comprises a PBX telephone switch and a voice messaging system, and said first telecommunications device control command is transferred to said PBX telephone switch and said second telecommunications device control command is transferred to said voice messaging system.

Claim 73

The telecommunications system installation and management apparatus of claim 60 wherein said at least one telecommunications device consists of a PBX telephone switch.