NT1R20Off Premise Station (OPS) analog line card Page433 of 544
Option11C and 11C Mini Technical ReferenceGuide
Figure 56
Traditional OPS application configuration
Note: OPS service should not be confused with off-premise extension
(OPS) service. OPS service is the provision of an extension to a main
subscriber loop bridged onto the loop at the serving CO or PBX.
Additionally, OPS as used to denote off-premise extension service
should not be confused with the OPS class-of-service assigned in the
Single-line Telephone Administration program (LD10).