AT&T Technical Reference 54077 (July 1998)
TR 54077, July 1998
OC-3 Optical Interface Specifications
This Technical Reference provides Network Interface (NI) and Point of Interface (POI) Specifications for the AT&T Private Line OC-12 (Optical Carrier Level 12) Service. The document includes a description of the service, technical parameters, physical interface requirements, logical interface requirements, and other necessary criteria for connecting Customer Premises Equipment (CPE) and/or access to OC-12 circuits to obtain the performance characteristics identified in Section 3.
Service Description
The AT&T Private Line Service (APLS) OC-12 Inter-Office Channel (IOC) Service is a service that provides dedicated point-to-point 622.08 Megabits per second (Mbps) digital service. A point-to-point service is defined as a two-way service where traffic originates/terminates in one location and terminates/originates in the other. The OC-12 IOC is comprised of STS-1 (Synchronous Transport Signal Level 1), and/or STS-3c (Synchronous Transport Signal Level 3 concatenated), or STS-12c (Synchronous Transport Signal Level 12 concatenated) tributary signals as required per customer application. The differences between the line rates and effective customer payloads are due to bits reserved for SONET overhead signaling. OC-12 service features optical interfaces at the NI and the POI.
Organization of Document
This Technical Reference contains the following sections:
Section 1 – Provides the purpose and organization of this document.
Section 2 – Provides an overview description of the AT&T Private Line OC-12 Service.
Section 3 – Provides availability and error performance parameters.
Section 4 – Provides interface specifications.
Section 5 – Provides synchronization and timing specifications.
Section 6 – Provides network alarm and status conditions.
Section 7 – Provides customer premises equipment characteristics.
Section 8 – Provides testing and maintenance requirements.
For further information contact:
AT&T Developmental Relations Group – District Manager
Room 5356C3
295 N. Maple Avenue
Basking Ridge, NJ 07920
ISDN Vendor testing program is currently suspended
For more information about AT&T documents, see: Catalog Of Communications Technical Publications, Publications Catalog (10000)