ITU-T Q.82-1993 PDF

Standard No.: ITU-T Q.82-1993
Release Date: 1993
Published By: International Telecommunication Union (ITU)
Status: Withdraw
Latest: ITU-T Q.82-1993

Scope: This Recommendation defines the Stage 2 for the Call Forwarding supplementary services (CFB, CFNR, CFU) of Integrated Services Digital Network (ISDN) as provided by public telecommunications operators. Stage 2 identifies the functional capabilities and the information flows needed to support the service description. The Stage 2 description also identifies user operations not directly associated with a call (see Recommendation I. 130 [i]). This Recommendation is specified according to the methodology specified in Recommendation Q.65 [2]. This Recommendation does not formally describe the relationship between this supplementary service and the basic call, but where possible this information is included for guidance. In addition, this Recommendation does not specify the requirements where the service is provided to the user via a private ISDN. This Recommendation does not specify the requirements for the allocation of defined functional entities within a private ISDN; it does however define which functional entities may be allocated to a private ISDN. This Recommendation does not specify the additional requirements where the service is provided to the user via a telecommunications network that is not an ISDN. This Recommendation describes the three versions of Call Forwarding supplementary services, when implemented using the “forward switching” network routing algorithm and partial rerouting at the public/private network interface as contained in Recommendation 4.80 [3]. The description of full rerouting as described in Recommendation Q.80 is outside the scope of this Recommendation. The procedures for the activatioddeactivationkegistration of the forwarding services are contained in Annex B. The CFU supplementary service permits a served user to have the network send to another number all incoming calls for the served user’s number (or just those associated with a specified basic service). The served user’s originating service is unaffected. If this service is activated, calls are forwarded no matter the condition of the termination. The CFB supplementary service permits a served user to have the network send to another number all incoming calls for the served user’s number (or just those associated with a specified basic service) which meet busy at the served user’s ISDN number. The served user’s originating service is unaffected. The CFNR supplementary service permits a served user to have the network send to another number all incoming calls for the served user’s number (or just those associated with a specified basic service) which meet no reply at the served user’s ISDN number. The served user’s originating service is unaffected. The forwarded-to number is registered with the network for use on all calls. This Recommendation is applicable to the Stage 3 Recommendations for the ISDN Forwarding supplementary services CFB, CFNR and CFU. The term “Stage 3” is also defined in Recommendation 1.130 [i]. Where the text indicated the status of a requirement, i.e. as strict command or prohibition, as authorization leaving freedom, as a capability or possibility, this shall be reflected in the text of the relevant Stage 2 and Stage 3 Recommendations. Furthermore, conformance to this Recommendation is met by conforming to the Stage 3 Recommendations with the field of application appropriate to the equipment being implemented. Therefore no method of testing is provided for this Recommendation.

ITU-T Q.82-1993 history

1993 ITU-T Q.82-1993 Stage 2 Description for Call Offering Supplementary Services Clause 2 - Call Forwarding Clause 3 - Call Deflection - General Recommendations on Telephone Switching and Signalling - Functions and Information Flows for Services in the ISDN (Study Group XI)

ITU-T Q.82-1993Stage 2 Description for Call Offering Supplementary Services Clause 2 - Call Forwarding Clause 3 - Call Deflection - General Recommendations on Telephone Switching and Signalling - Functions and Information Flows for Services in the ISDN (Study Group XI)

ITU-T Q.82-1993 history

ITU-T Q.82-1993
Stage 2 Description for Call Offering Supplementary Services Clause 2 - Call Forwarding Clause 3 - Call Deflection - General Recommendations on Telephone Switching and Signalling - Functions and Information Flows for Services in the ISDN (Study Group XI)