US5067126A
Expired / Lapsed
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Method and apparatus for mapping a digital signal carrier to another
Assignee: Telecommunications Res Labs
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Filing: 1989-08-04
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Granted: 1991-11-19
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Expires: 2009-08-04
Abstract
Abstract A DS-3 to 28 VT1.5 SONET Interface Circuit is shown, without using standard intermediate DS-2 and DS-1 Desynchronizer Phase-Lock Loops. The elimination of DS-2 and DS-1 Desynchronizer Phase Lock Loops results in a significant reduction in cost and complexity of SONET interface circuits for the existing asynchronous digital multiplex hierarchy.
Inventors
- 👤 Thomas E. Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:20
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/02; H04J3/06; H04J3/07; H04J3/076; Y; Y10; Y10S; Y10S370/00; Y10S370/901; Y10S370/902; Y10S370/903; Y10S370/907
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
64 words
A process for the mapping of a first digital signal carrier carrying a first multiplexed digital signal to a second digital signal carrier comprising: demultiplexing the first digital signal to produce a second digital signal and to derive a gapped clock; writing the second digital signal to an elastic store using the gapped clock; and reading the second digital signal from the elastic store.
Claim 2
Dependent Claim
64 words
A process for the mapping of a first digital signal carrier carrying a first multiplexed digital signal to a second digital signal carrier comprising: demultiplexing the first digital signal to produce a second digital signal and to derive a gapped clock; writing the second digital signal to an elastic store using the gapped clock; and reading the second digital signal from the elastic store.
Claim 3
Dependent Claim
15 words
The process of claim 1 in which the second digital signal is a SONET signal.
Claim 4
Dependent Claim
79 words
Apparatus for the mapping of a first digital signal carrier carrying a first digital signal to a second digital signal carrier comprising: a demultiplexer for demultiplexing the first digital signal to produce a second digital signal; gapping means for gapping the first digital signal carrier to derive a gapped clock; writing means for writing the second digital signal to an elastic store using the gapped clock; and reading means for reading the second digital signal from the elastic store.
Claim 5
Dependent Claim
79 words
Apparatus for the mapping of a first digital signal carrier carrying a first digital signal to a second digital signal carrier comprising: a demultiplexer for demultiplexing the first digital signal to produce a second digital signal; gapping means for gapping the first digital signal carrier to derive a gapped clock; writing means for writing the second digital signal to an elastic store using the gapped clock; and reading means for reading the second digital signal from the elastic store.
Claim 6
Dependent Claim
69 words
Apparatus for mapping a DS-3 digital signal to a SONET signal, the apparatus comprising: a first demultiplexer for demultiplexing the DS-3 signal to generate a DS-2 signal and to generate a gapped DS-2 clock; a second demultiplexer to demultiplex the DS-2 signal to generate a DS-1 signal and to generate a gapped DS-1 clock; and bit stuffing means for bit stuffing the DS-1 signal to create a SONET signal.
Claim 7
Dependent Claim
69 words
Apparatus for mapping a DS-3 digital signal to a SONET signal, the apparatus comprising: a first demultiplexer for demultiplexing the DS-3 signal to generate a DS-2 signal and to generate a gapped DS-2 clock; a second demultiplexer to demultiplex the DS-2 signal to generate a DS-1 signal and to generate a gapped DS-1 clock; and bit stuffing means for bit stuffing the DS-1 signal to create a SONET signal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-11-18 | 1995-05-20 | 1995-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-18 | 1999-05-20 | 1999-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-18 | 2003-05-20 | 2003-11-19 | $7700.00 | Window Closed / Lapsed |