Digital cellular telecommunications system (Phase 2+) (GSM); Procedures for call progress indications (GSM 02.40 version 6.0.0 release 1997)
STANDARD published on 30.4.1999
Designation standards: ETSI TS 100512-V6.0.0
Publication date standards: 30.4.1999
The number of pages: 10
Approximate weight : 30 g (0.07 lbs)
Country: European technical standard
Category: Technical standards ETSI