Synchronous transport module STM-o

Abstract

Abstract Between the European plesiochronous digital signal hierarchy and the synchronous digital multiplex hierarchy, a standardised link is missing via several of which four 34.368-Mbit/s signals can be inserted into a synchronous transport module STM-1. A synchronous transport module STM-0 having 135 columns (Sp) and 9 rows (Z) is proposed for a repetition rate of 4 kHz and a transmission capacity of 38.88 Mbit/s, which, in addition to an overhead (SOH, DZA) having three columns and two further columns (SG) for in-house signals, exhibits two user-information blocks (AU-31/1, AU-31/2) having in each case 65 columns. Apart from one standardised virtual container and one already proposed, a further virtual container suitable for insertion into these user-information blocks (AU-31/1, AU-31/2) is specified which can be transferred from there in a simple manner into a standardised synchronous transport module STM-1 of the next-higher hierarchy level. Furthermore, proposals are made for placing the data pointers. The synchronous transport module STM-0 is recommended as lowest level in the synchronous digital multiplex hierarchy. <IMAGE>

Inventors

• 👤 Horst Dipl.-Ing. Müller

Bibliographic Details