This standard addresses Operations, Administration, Maintenance,
and Provisioning (OAM&P) for internetwork connections employing
Common Channel Signalling (CCS) based on Signalling System Number 7
(SS7) protocol used in North America. The internetwork connection
may be either within or between North American countries.
This standard presents principles, specifies requirements,
describes architectures and protocol procedures, and identifies
strategies for performance of OAM&P functions, including
compatibility verification and gateway screening.
It identifies procedures, actions, and responsibilities for
performance of functions for management of network
interconnections. In addition, it identifies responsibilities
requiring bilateral (carrier-to-carrier) agreements for
administrative control of OAM&P functions. No attempt is made
to specify agreements or assign responsibilities.
The accomplishment of the OAM&P functions takes advantage of
the SS7-protocol-provided capabilities augmented by
Telecommunications Management Network (TMN) capabilities. The
protocol-provided capabilities include signalling network and
traffic management functions that permit real time detection of
failures, automatic recovery, and service restoration. The TMN
functionality provides constant monitoring and control of the
signalling points as managed entities of the TMN.
The use of the SS7 network to provide message transport service
for the TMN traffic has not been addressed. This subject involves
protocol-related issues that are considered beyond the scope of
this standard. This standard assumes the use of a separate data
network for transport of the intra- and inter- TMN traffic.
However, limited TMN capabilities exist currently through the use
of OMAP protocol in SS7.
In addition, this standard does not address conformance testing.
Further, it does not provide details of compatibility testing
including test scripts for compatibility verification. These
subjects will be addressed in future standards.
NOTE – The term management is used in the context of performance
(and supervision of the performance) of functions relating to SS7
network interconnections. The functions necessary for SS7
interconnections relate to Operations, Maintenance Administration,
Provisioning, and Security
This standard uses material from the following American National
Standards on SS7 protocol:
T1.111-1996, Message Transfer Part
T1.112-1996, Signalling system number 7 (SS7) – Signalling
connection control part (SCCP).1
T1.113-1995, Signalling System Number 7 (SS7) - Integrated
Services Digital Network (ISDN) User Part.1
T1.116-2000, Signalling System Number 7 (SS7) - Operations,
Maintenance, and Administration Part (OMAP).1
to form the basis or establish the context for discussion of
OAM&P functions. In addition, such material is used to clarify
the working of the protocol to facilitate definition of OAM&P
Although SS7 definitions are included in this document, as well
as in T1.110-1999, Signalling System Number 7 (SS7) - General
Information, the definitions in this document are tailored to
the SS7 operations environment.
NOTE – The above-mentioned American National Standards are to be
used as the definitive reference documents for SS7-protocol-related
issues. Protocol-related standards are listed as references in
This standard provides a uniform basis for management of
OAM&P functions for network interconnections employing CCS
based on SS7 protocol. It recommends acceptable norms of
performance of the functions mentioned above for delivery of
cross-border services as well as services requiring interoperation
of CCS facilities between networks. Recognizing that achievement of
acceptable levels of availability of CCS services to the end user
will require a high level of satisfactory performance of the
above-mentioned functions on an end-to-end basis, this standard
serves to provide a uniform set of functions for management of CCS
network on an end-to-end basis.
1 This document is available from the Alliance for
Telecommunications Industry Solutions, 1200 G Street N.W., Suite
500, Washington, DC