Full Description

CCS Node Generic Requirements to Support Routing Verification Tests

Document Number GR-1245
Issue Number 03
Issue Date Oct 1999
Replaces TA-NWT-001245 Issue03

    ABSTRACT: GR-1245, CCS Node Generic Requirements To Support Routing Verification Tests, presents generic requirements and objectives for Common Channel Signaling (CCS) network nodes. A CCS node is a network element or network system connected to the CCS network via Signaling System Number 7 (SS7) links supporting Message Transfer Part (MTP) Routing Verification Tests (MRVT) and Signaling Connection Control Part (SCCP) Routing Verification Tests (SRVT).

    MRVT and SRVT are defined in the Operations, Maintenance and Administration Part (OMAP) of the SS7 protocol T1.116. These tests provide a powerful tool for the detection and isolation of routing problems in CCS networks. They can be used both for intranetwork and internetwork testing. Examples of MTP routing problems that the MRVT can detect are a Signal Transfer point (STP) loop causing infinite message circulation over the link sets in the loop, inability to route a message to its destination, and excessive number of STPs in the message path. Examples of the SCCP routing problems that the SRVT can detect are an STP loop, inability to perform a global title translation (GTT), and excessive number of translations for a message.

    Issue 3 of GR-1245 includes new additional procedures and requirements to allow SCCP routing verification testing in a Local Number Portability environment. In addition, Appendix B was added and addresses RVT Support of the XUDT Message Type. Appendix B focuses on RVT treatment of the XUDT's optional parameters and the UDT/XUDT Message Change procedure that may be implemented in a CCS network containing both UDT-only capable nodes and XUDT-capable nodes.

    GR-1245 replaced TR-NWT-001245.

    This GR also includes one or more Issue List Reports (ILRs) that details open or closed technical issues in the main document. The ILR(s) are automatically sent free of charge to the GR document purchaser.

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