Nortel Circuit Card Installation Manual page 182

Page 182 of 906
553-3001-211 Standard 3.00
NT1R20 Off-Premise Station Analog Line card
OPS line terminations with loudness characteristics designed for other
applications can also impact transmission performance. For example,
wireless portables loudness characteristics are selected for connections to
switching systems for wireless communication systems; if used in an OPS
arrangement without consideration for these characteristics, the result could
be a significant deviation from optimum loudness performance.
August 2005