TA NPL 000912 : ISSUE 1
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
COMPATIBILITY INFORMATION FOR TELEPHONE EXCHANGE SERVICE
07-23-2013
01-12-2013
This document describes the electrical interactions for telephone exchange service at the network interface between customer premises equipment and a BCC's network. A summary of the features of telephone exchange service is provided. Service features that may be available in conjunction with telephone exchange service are also described. The interface specifications are for the common tip and ring interface. Protocols are specified for loop-start supervision, ground-start supervision and loop reverse-battery supervision. References are provided for quantitative limits on the voltages and currents at the interface
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