Setting the Companding Law
To set the companding law:
- In the WebUI, click the Settings tab.
In the left navigation pane, go to System > System Companing Law.
Configuration - Field Definitions
Companding Law
Specifies which companing law the system uses.
Click to see more information.
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.