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.