Terrestrial Link Handling - Ericsson CME 20 R6.1 Reference Manual

34

Terrestrial Link Handling

This chapter covers RBS functions for layer 2 communication on A-bis.
The function Layer 2 Link Handling is used for layer 2 signalling to/
from RBS.
34.1 References
Whenever a reference is made to a function described in another chapter,
please refer to the table of contents to find the appropriate chapter.
34.2 Concepts
Operation and Maintenance Link
Radio Signalling Link
34.3 Function
34.3.1 Layer 2 Link Handling of OML and RSL
The link layer used for signalling on the A-bis interface between BSC
and BTS is established and maintained according to Technical
Specification /GSM 08.56/.
LAPD (Link Access Protocol on the D-channel) is used for layer 2
signalling. Signalling conforms to /GSM 08.56/ with the exception that
the TEI management procedures are not needed.
34.4 Operational Conditions
34.4.1 Operation and Maintenance
Maintenance functions related to definition of layer 2 address (TEI) are
described in chapter Operation and Maintenance Terminal.
34.4.2 Capabilities
Not applicable.
EN/LZT 123 2697 R5A
1998-08-13
Layer 2 communication link for operation
and maintenance services on A-bis.
Layer 2 communication link for traffic
services on A-bis.
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