Nortel Networks NN43001-106 User Manual

Page 499

499

B34 Dynamic Loss Switching

Contents

This section contains information on the following topics:

"Feature description" (page 499)

"Operating parameters" (page 501)

"Feature interactions" (page 502)

"Feature packaging" (page 505)

"Feature implementation" (page 505)

"Feature operation" (page 505)

Feature description

A codec is a device on an Intelligent Peripheral Equipment (IPE) card which
encodes incoming transmission data from analog to digital, and decodes
outgoing transmission data from digital to analog. The B34 codec is a
four-channel codec providing 32 programmable loss values in 0.5 dB steps
in both the transmit and receive directions. The B34 allows transmission
parameters, which have been downloaded to the IPE unit, to be changed
by software. Since the loss and level requirements differ from country to
country, this allows system compliance to the different transmission plans
used in the world markets using a single codec. The selected coded levels
are downloaded to each unit based on the unit’s port type classification.
This is referred to as static downloading. These levels will be used for
all call connections involving that unit. The B34 Codec Static Loss Plan
Downloading feature is, therefore, used on systems where a single loss
setting is sufficient for all types of call connections (this feature is described
elsewhere in this publication).

The Dynamic Loss Switching feature provides loss switching on international
IPE analog trunks cards (XCOT, XFCOT, XDID, XCO/XDID, XFEM, or any
trunk configured with XTRK type of XCOT, XDID, or XFEM).

Nortel Communication Server 1000

Features and Services - Book 1 of 6 (A to B)

NN43001-106

01.04

Standard

Release 5.0

27 July 2007