Digital cellular telecommunications system (Phase 2+) - ANSI-C code for the GSM Enhanced Full Rate (EFR) speech codec (GSM 06.53 version 8.0.1 Release 1999) (incl. Diskette!!!)
Edition 2001-02-01

Digital cellular telecommunications system (Phase 2+) - Test sequences for the GSM Enhanced Full Rate (EFR) speech codec (GSM 06.54 version 8.0.1 Release 1999) (incl. CD-ROM!!!)
Edition 2001-02-01

Digital cellular telecommunications system (Phase 2+) - Half rate speech - ANSI-C code for the GSM half rate speech codec (GSM 06.06 version 8.0.1 Release 1999) (incl. Diskette!!!)
Edition 2001-02-01

Digital cellular telecommunications system (Phase 2+) - Half rate speech - Test sequences for the GSM half rate speech codec (GSM 06.07 version 8.0.1 Release 1999) (incl. CD-ROM!!!)
Edition 2001-02-01

Digital cellular telecommunications system (Phase 2) - Test sequences for the GSM Enhanced Full Rate (EFR) speech codec (GSM 06.54 version 4.0.1) (incl. CD-ROM!!!)
Edition 1999-01-01

Digital cellular telecommunications system (Phase 2+) - Adaptive Multi Rate (AMR) speech - ANSI-C code for the AMR speech codec (GSM 06.73 version 7.4.1 Release 1998) (incl. Diskette!!!)
Edition 2000-12-01

Digital cellular telecommunications system (Phase 2+) - Test sequences for the Adaptive Multi-Rate (AMR) speech codec (GSM 06.74 version 7.0.3 Release 1998) (incl. CD-ROM!!!)
Edition 2000-12-01

Terrestrial Trunked Radio (TETRA) - Speech codec for full-rate traffic channel - Part 1: general description of speech functions (V1.2.1)
Edition 2005-06-01

Terrestrial Trunked Radio (TETRA) - Speech codec for full-rate traffic channel - Part 2: TETRA codec (V1.3.1)
Edition 2005-06-01

Terrestrial Trunked Radio (TETRA) - Speech codec for full-rate traffic channel - Part 3: specific operating features (V1.2.1)
Edition 2005-06-01