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  1. In the WebUI, click the Settings tab.

  2. In the left navigation pane, go to System > System Companing Law.

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    Caption
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    1Set Companding Law

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Configuration - Field Definitions

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Specifies which companing law the system uses.

Toggle Cloak
idcompandingLaw
Click to see more information.

Cloak
idcompandingLaw

The correct companding law is dependent upon the physical interface type and switch variant.

Port Type

Protocol/Switch Variant

Companding Law

T1

ISDN/CAS

Mu-Law

E1

ISDN/CAS

A-Law

BRI

Japan ISDN

Mu-Law

BRI

ETSI/QSIG

A-Law

Caution

Misconfigured Companding Laws may result in dropped calls and/or poor audio quality. Symptoms include dropped outgoing ISDN/BRI calls and loud crackling noises on ISDN/Analog and BRI/Analog calls.

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