3 Connected Line Identification Presentation (COLP)
22.0813GPPLine Identification supplementary servicesStage 1TS
3.1 Definition
The Connected Line Identification Presentation (COLP) Supplementary Service provides the calling party with the possibility to receive the line identity of the connected party.
3.2 Description
3.2.1 Description
This Supplementary Service is not a dialling check but an indication to the calling subscriber of the connected line identity in a full ISDN/PLMN environment, the connected line identity shall include all the information necessary to unambiguously identify the connected party.
The network shall deliver the connected line identity to the calling party regardless of the terminal capability to handle the information.
3.2.2 Applicability to telecommunication services
The applicability of this Supplementary Service is defined in 3GPP TS 22.004.
3.3 Normal procedure with successful outcome
3.3.1 Provision
This Supplementary Service is provisioned for all Basic Services subscribed to and to which it is applicable, i.e. not provisioned for any subset of these Basic Services.
Override category within a PLMN
Override category within an ISDN/PLMN. Depending on national regulations, some networks may define categories of subscribers that have the ability to override the presentation restriction (COLR, clause4) and have the connected line identity presented (e.g., the police). The ability to have such an override category is a national option.
Override category between a PLMN and a network providing connected line identification restriction.
Override category between ISDNs/PLMNs. When a call originates in one ISDN/PLMN and terminates in another ISDN/PLMN and the COLR Supplementary Service is applied, the rules and regulations of the originating network shall apply.
The override category is only applicable within the HPLMN country.
3.3.2 Withdrawal
The COLP Supplementary Service shall be withdrawn at the customer’s request or for administrative reasons.
3.3.5 Activation
The COLP Supplementary Service is activated as a result of provision.
3.3.6 Deactivation
The COLP Supplementary Service is deactivated as a result of withdrawal.
3.3.7 Invocation
The network shall automatically invoke the COLP Supplementary Service on each outgoing call made by the served user.
3.3.8 Normal operation with successful outcome
The calling subscriber shall at the end of the call set-up phase receive the connected line identity.
In addition to or instead of the connected line identity the subscriber may be given a Presentation Indicator and/or a Screening Indicator with the relevant information.
3.3.11 Interrogation
Status check
The mobile subscriber can request the status of the Supplementary Service and be informed if the service is provided to her.
3.4 Exceptional procedures or unsuccessful outcome
If the COLR Supplementary Service is applicable to the call, the served user shall receive an indication that the connected line identity is not available due to restriction.
NOTE: See also subclause 3.3.1 (override category).
In some interworking situations in which the connection is not completely supported by sufficient signalling capability, the served user shall receive an indication that the connected line identity is not available.
For an international call in which the destination network does not provide the connected line identity, then the served user shall receive an indication that the connected line identity is not available.
3.5 Alternate procedures
None identified.
3.6 Interactions with other Supplementary Services
3.6.81.4 Connected line identification restriction
The COLR Supplementary Service shall take precedence over the COLP Supplementary Service. The COLP Supplementary Service can take precedence over the COLR Supplementary Service when the served user has an override category. The availability of the override category as well as the handling of connected line identity parameters for the override category is a national option.
3.6.82.1 Call forwarding unconditional
If the served (forwarding) user selects the option that the calling user is not notified of call forwarding, then the calling user shall receive no forwarding notification, and the calling user shall not receive the connected line identity when the call is answered, unless the calling user has override capability. Otherwise, no interaction.
3.6.82.2 Call forwarding on mobile subscriber busy
Same as the interaction with call forwarding unconditional.
3.6.82.3 Call forwarding on no reply
Same as the interaction with call forwarding unconditional.
3.6.82.4 Call forwarding on mobile subscriber not reachable
Same as the interaction with call forwarding unconditional.
3.6.84.1 Multiparty
Multiparty controller: no impact, i.e. neither Supplementary Service shall affect the operation or the other Supplementary Service.
Remote parties: they shall not receive the COLP Supplementary Service information of parties being added to the conference.
3.7 Interworking considerations
According to national network specific rules the COLP Supplementary Service need not be applicable, if at least one of the two parties is not an ISDN or PLMN subscriber.