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Glossary

SACCH/C4 (Slow Associated Control CHannel/SDCCH/4) in 3GPP: meaning and where it is specified

Published 2026-10-16Updated 2026-10-16

At a glance

Term
SACCH/C4
Stands for
Slow Associated Control CHannel/SDCCH/4
Defined in
3GPP TR 21.905 V19.2.0, clause 4
Used in
TS 45.001, TS 45.002

In plain words

The vocabulary entry expands SACCH/C4 as "Slow Associated Control CHannel/SDCCH/4", describing a slow associated control channel linked to SDCCH/4. TS 45.001 identifies it as a slow control channel associated with SDCCH/4, and TS 45.002 includes SACCH/C4 in its mapping tables.

Source: 3GPP TR 21.905 V19.2.0, clause 4. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/21_series/21.905/21905-j20.zip

Sources

  1. 3GPP TR 21.905 V19.2.0, clause 4. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/21_series/21.905/21905-j20.zip
  2. 3GPP TS 45.002 V19.0.0, clause 7. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/45_series/45.002/45002-j00.zip
  3. 3GPP TS 45.001 V19.0.0, clause 2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/45_series/45.001/45001-j00.zip

How this page was made

The facts box comes straight from the 3GPP TDoc list and specification archive as indexed by 3GPP Scout. An AI model (GPT-6 Luna) wrote the paragraph and named the source of each sentence. Code checked every quote word for word against the stored source text and every number against the cited source. A second AI model from another company (Claude Opus 5.5) reviewed the paragraph against the same sources. The 3GPP documents themselves govern.