Common Channel Signaling Network Interface Specification (CCSNIS) Supporting Network Interconnection, Message Transfer Part (MTP), and Integrated Services Digital Network User Part (ISDNUP)
Document Number GR-905
Issue Number 19
Issue Date Dec 2016
Replaces TR-TSV-000905 Issue02
As Common Channel Signaling (CCS) networks have continued to evolve, and network interconnection architectures and the services they
support have grown more complex, it has become necessary to identify the type of behavior all network providers are expected to exhibit
when specific requirements do not exist. GR-905 provides Interconnecting CCS Networks (ICNs) and other interconnecting networks (e.g.,
Session Initiation Protocol [SIP]-based networks; Bearer Independent Call Control [BICC]-based networks) with the Telcordia view of
critical compatibility information required for successful network interconnection with client company CCS networks. These ICNs include
Interexchange Carriers (IXCs), International Carriers (INCs), and Other LATA Carriers (OLCs) such as Independent Local Exchange
Carriers (ILECs) and Wireless Service Providers (WSPs).
GR-905 includes the interface architecture and interface protocol messages, signals, conditions, and events that occur to support
the exchange of information between networks. In addition, GR-905 describes the physical interconnection; performance objectives; and
provisioning, operations, maintenance, and network compatibility testing necessary to allow CCS networks to interconnect successfully.
GR-905 also provides important information for providers of Legacy Network Gateway and Legacy Selective Router Gateway systems to
support the delivery of emergency calls between legacy origination networks and IP-enabled PSAPs, as well as emergency calls routed via
Emergency Services IP Networks (ESInets) and legacy PSAPs that are served by Selective Routers.
Issue 19 includes the following key changes from Issue 18:
- Appendix K, IP Multimedia Subsystem (IMS) Overview, has been updated to describe new Functional Elements that were
incorporated into the Alliance for Telecommunications Industry Solutions (ATIS) IMS-based Next Generation 9-1-1 (NG9-1-1) Service
Architecture and reflected in the ATIS NGN Phase 2 architecture. In addition, updates to call flows and document references in this
section have been provided.
- Appendix L, Network Interconnection to Support the Delivery of Legacy Emergency Call Originations to IP-Enabled PSAPs, has
been updated to clarify the procedures performed by the Legacy Network Gateway so that they better align with the National Emergency
Number Association (NENA) i3 Version 2 standard. Terminology was also updated and a reference to the NENA i3 Version 2 standard was
included in this update.
- Appendix N, SS7-Based Interconnection Between Emergency Services IP Networks and Legacy Selective Routers to Support Emergency
Call Delivery, has been updated to reflect the evolution of NENA standards defining the functions and interfaces supported by a
Legacy Selective Router Gateway. Specifically, the updates clarify the processing at the Legacy Selective Router Gateway and include
two new call flows: one that illustrates a scenario where an emergency call originates at a legacy wireline end office that is served
by a Selective Router and is routed via an ingress Legacy Selective Router Gateway to an i3 ESInet with location-by value; and a second
call scenario involving an egress Legacy Selective Router Gateway, where an emergency call is routed via an i3 Emergency Services IP
Network (ESInet) (either directly from an IP originating network or from a legacy originating network via a Legacy Network Gateway) and
is delivered with location-by-reference to a legacy PSAP that is still being served by an SR.
- Appendix P, Improved Location Accuracy for Wireless Emergency Calling, has been updated to describe progress made in
industry activities related to support for the delivery of heightened accuracy location information associated with wireless emergency
originations to PSAPs.
Issue 19 of GR-905, Common Channel Signaling Network Interface Specification (CCSNIS) Supporting Network Interconnection, Message
Transfer Part (MTP), and Integrated Services Digital Network User Part (ISDNUP), replaces Issue 18.
The following documents were fully or partially replaced by GR-905: TR-TSV-000905, TR-TSV-000962, TA-TAP-001004, and TA-OPT-001257.
Parts of GR-905 were moved to GR-954, GR-1248, and GR-1432.
When using GR-905, you may want to refer to GR-82, GR-246, GR-317, GR-394, GR-436, GR-510, GR-693,
GR-1432, GR-2878, GR-2936, GR-3029, and various standards and industry forum documentation.
Components of this product are:
Table of Contents:
View Table of Contents
We can accept credit cards, Wire Transfers, or Purchase Orders. For PDF, EMAIL, or DOWNLOAD media, you must complete your purchase online by credit card, or by calling Customer Service. If you have additional payment questions or we can assist in any way, please contact Customer Service. You can also go to our Ordering/Payment FAQs page for further information. See our Return Policy for details on returns.