Transmission Interface Handling DS1 1544 kbit/s
33 Transmission Interface Handling DS1 1544
kbit/s
This function specification covers RBS functions for layer 1
communications on A-bis.
The function Layer 1 Termination terminates a 1544 kbit/s DS1 PCM
line.
The function Supervision of Transmission faults detects faults in the
transmission interface.
The function Supervision of Transmission Quality monitors the quality
of the transmission.
33.1 References
Transmission references :
• ANSI T1.403-1989
• AT&T T1.5 Service (TR 62411) Dec. 1990
• Bellcore TR-NWT-000499 Apr. 1992
33.2 Concepts
ESF Extended Superframe Format.
The content and structure of the F-bit is
described in Table 24 on page 200. This
table is included to ease the understanding
of the functions: Layer 1 Termination, and
Supervision of Transmission Faults.
EN/LZT 123 2697 R5A
1998-08-13
199 (306)
© Ericsson Radio Systems AB
— All Rights Reserved —
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