ABSTRACT: This Technical Reference (TR) presents the view of Telcordia on the criteria necessary to support the surveillance-based maintenance of Integrated Services Digital Network (ISDN) Basic Rate Access (BRA) transmission facilities, ISDN D-Channels, Common Channel Signaling (CCS) signaling links, Public Packet-Switched Network (PPSN) trunk and high-speed access lines, and circuits terminating on switching systems.

This document builds upon the surveillance principles and concepts developed in GR-820-CORE, Generic Digital Transmission Surveillance, and applies them to additional transport or transport-based entities. In general, a Network Element (NE) can provide two types of surveillance information: (1) information pertaining to the quality or health of the transport or transport-based entity that it monitors (2) information related to its own hardware/software troubles. This document focuses on the surveillance criteria for transport-based entities.

Revision 1 replaces Subsection 2, "ISDN Basic Access Transmission Surveillance," of the document. All changed or new technical matter in the revision has been flagged with "change bars" in the right margin.

Revision 2 adds Section 3.5.6. adds requirements for the protocol abnormality log. The new requirements enable the protocol abnormality log to record historical information for abnormalities that occur on X.75' interoffice packet trunks. Previously, the protocol abnormality log recorded historical information for abnormalities that occur on ISDN access lines only.

Revision 3 modifies Terminal Endpoint Identifier (TEI)-management requirements to apply for Basic Rate Interfaces (BRIs) only and will not be supported for Primary Rate Interfaces (PRIs). In addition, minor corrections and clarifications regarding currently exiting requirements are included in this revision.