Good old ISDN. This section contains some information about the various specifications from our friends at the ITU, Bellcore/Telordia, Lucent and Nortel (you know the guys who still charge for standards).
| ITU |
| Spec |
Latest |
Name |
| Q.921 |
June 2000 |
ISDN user-network interface - Data Link Layer |
| Q.922 |
Feb 1992 |
ISDN data link layer specification for Frame Mode Bearer Services |
| Q.930 |
March 1993 |
Digital Subscriber Signalling System No. 1 (DSS1) - ISDN user-network interface layer 3 - General Aspects |
| Q.931 |
May 1998 |
Digital Subscriber Signalling System No. 1 (DSS1) - ISDN user-network interface layer 3 - specification for basic call control |
| Q.932 |
June 2000 |
Digital subscriber Siganlling System No. 1 (DSS1) - Generic Procedures for the control of ISDN Supplementary Services |
| Q.950 |
June 2000 |
Supplementary Services protocols, structure and general principles |
| Q.951 |
|
Supplementary Services - Number Identification |
| Q.952 |
|
Supplementary Services - Call Offering |
| Q.953 |
|
Supplementary Services - Call Completion
(so we gotta pay extra to finish a call!!?) |
| Q.954 |
|
Supplementary Services - Multiparty |
| Q.955 |
|
Supplementary Services - Community of Interest |
| Q.956 |
|
Supplementary Services - Charging |
| Q.957 |
|
Supplementary Services - Additional Information Transfer |
| Bellcore/Telordia |
| SR-NWT-002361 |
1992 |
National ISDN-2 (NI-2) |
| SR-NWT-001937 |
|
National ISDN-1 (NI-1) |
| SR-NWT-001953 |
1991 |
National ISDN-1 (NI-1) |
| Lucent |
| 235-900-341 |
|
National ISDN specification. |
| 235-900-343 |
|
Custom ISDN specification. |
| Nortel Networks |
| NIS S208-6 |
|
Includes NI-1,2 and Custom features. |
