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Chapter 2 — Transmission parameters
Introduction
Transmission
Loss Plan
The Meridian 1 Option 11C Compact system uses µ-Law companding to
convert signals from analog to digital and from digital to analog.
Transmission characteristics are given in this chapter. Except where indicated
otherwise, the design objectives given are met when measured between 2
wire and 4 wire analog input and output interfaces terminated with their
nominal impedance.
The reference frequency is 1024 Hz. The reference level is -10 dBmO (as an
alternative a reference level of 0 dBmO may be used).
Insertion loss
The insertion loss of a private branch exchange (PBX) connection is defined
as the difference between the power delivered from the (test) reference source
into the input port and the power at the output port. For insertion loss tests
both the signal source and the measurement instrument have impedances of
600 ohms. The test frequency is 1024 Hz.
The insertion losses between various Peripheral Equipment (PE) ports are
connection - specific in order to be compatible with end-to-end network
connection loss requirements. The Option 11C Compact loss specifications
are in agreement with North American standards, which are formulated to
provide satisfactory end-to-end performance for connections within private
networks and between private and public networks.
Meridian 1 Option 11C Compact
Page 11 of 136
Technical Reference Guide
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