Scope:
This International Standard specifies the service description and control aspects, including functional capabilities and information flows, of standardised circuit-mode bearer services which may be supported by a Private Integrated Services Network (PISN).
This International Standard includes the following basic services:
- Circuit-mode 64 kbit/s unrestricted 8 kHz structured bearer service category;
- Circuit-mode 64 kbit/s 8 kHz structured bearer service category usable for speech information transfer;
- Circuit-mode 64 kbit/s 8 kHz structured bearer service category usable for 3,1 kHz audio information transfer.
A PISN shall support at least one of the above three bearer services to conform with this International Standard.
The scope of this International Standard does not include:
- the negotiation of service at call establishment time,
- the change of service during a call, and
- unidirectional services.
This International Standard includes optional procedures for the provision of functions equivalent to the following public ISDN supplementary services: Subaddress and Multiple Subscriber Number.
Note 1 - Supplementary services and other bearer services which can be used in conjunction with 64 kbit/s circuit switched bearer services specified in this International Standard are dealt with in other standards.
Note 2 - Service specifications are based on information concerning the corresponding public ISDN service available at the time of publication of this International Standard.
Note 3 - ITU-T treat Subaddressing and Multiple Subscriber Number as supplementary services.
Note 4 - The use of the Direct Dial In supplementary service of a public ISDN for calls incoming to a PISN from a public ISDN is regarded as part of the basic services in a PISN.
Note 5 - The use of the Calling Line Identification Presentation and Connected Line Identification Presentation supplementary services of a public ISDN for obtaining the Originating Number or the Connected Number of a call from or to a public ISDN is regarded as part of the basic services in a PISN.
Note 6 - The provision (either explicitly or implicitly) by the user to the network, of its own number (Originating Number or Connected Number), and the provision of an Originating Number or a Connected Number by a PISN to another network is a part of the basic services in a PISN and not a part of the Calling Line Identification Presentation and Connected Line Identification Presentation
| File Size : | 1
file
, 2.2 MB |
| ISBN(s) : | 9781553242939 |
| Number of Pages : | 103 |
| Product Code(s) : | 2414379, 2414379 |
| Published : | 03/26/2001 |
