TS 08.56 – LAPD Protocol for A-bis Interface Signalling
3GPP TS 08.56 is the 3GPP Technical Specification for LAPD Protocol for A-bis Interface Signalling. It is published in 4 releases (Ph2 to R98); the latest version is 7.0.0 in R98.
Defines Link Access Procedure on D-channel (LAPD) for signalling between BSC and BTS on A-bis interface, including protocol definitions and services provided to layer 3.
Releases and versions of TS 08.56
| Release | Latest version | Links |
|---|---|---|
| R98 | 7.0.0 | Read · Download (3GPP) |
| R97 | 6.0.0 | Read · Download (3GPP) |
| R96 | 5.0.0 | Read · Download (3GPP) |
| Ph2 | 4.0.2 | Read · Download (3GPP) |
Scope of TS 08.56
Category: Radio Access (Signalling Protocols). Technology generation: 2G. Network layer: RAN.
Who should read this specification?
- Network operators
- Device manufacturers
- Regulators and standards bodies
Implementation notes
Complexity level: Intermediate. Implementation difficulty: Medium.
Key technologies
Other specifications in the 08 series
- TS 08.31 SMLCPP Protocol for SMLC Communication
- TS 08.51 BSC-BTS Interface General Aspects
- TS 08.52 A-bis Interface Between BSC and BTS
- TS 08.54 BSC-BTS Physical Layer Specification
- TS 08.58 A-bis Interface Layer 3 Procedures
- TS 08.60 Abis Interface Frame Structure and Control
- TS 08.61 BTS-TRAU Protocol for Half Rate Channels
- TS 08.62 TFO Inband Signalling Protocol
Related glossary terms
Related topics
Frequently asked questions
What is 3GPP TS 08.56?
3GPP TS 08.56 is the 3GPP Technical Specification for LAPD Protocol for A-bis Interface Signalling. Defines Link Access Procedure on D-channel (LAPD) for signalling between BSC and BTS on A-bis interface, including protocol definitions and services provided to layer 3.
Which 3GPP releases include TS 08.56?
TS 08.56 is published in 4 releases, from Ph2 to R98. The latest version on 3GPP Explorer is 7.0.0 (R98).
What category does TS 08.56 belong to?
TS 08.56 belongs to the Radio Access (Signalling Protocols) category of 3GPP specifications. It applies to 2G networks.
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