16.2. ALUL - A- to Mu- Law Convertor 
Feature:
a-law/u-law and u-law/a-lawConverter in the D-Channel (SETUP).
Function:
A US-Switch is working with u-law and a IM-Switch is working with a-law. If this two
switches are connected together by using an a-law/u-law Converter (internal or external)
the
B-Channel will be translated but the coding in the D-Channel (SETUP) is still wrong.
Therefore whenever a Switch is working in u-law and the new COP Parameter is set,
it will
accept a SETUP with a-law and change it to u-law and vice versa. Otherwise the SETUP
will be
rejected.
Parameter set (u-law-Switch): Accept a SETUP with a-law in bearer-capability IE and
change
it to u-law. Outgoing SETUP with u-law in BC IE will be changed to a-law.
Parameter not set (u-law-Switch): An incomming SETUP with a-law in the Bearer-Capability
IE
would be rejected.
Parameter set (a-law-Switch): Accept a SETUP with u-law in bearer-capability IE and
change
it to a-law. Outgoing SETUP with a-law in BC IE will be changed to u-law.
Parameter not set (a-law-Switch): An incomming SETUP with u-law in the Bearer-Capability
IE
would be rejected.
Hints: Effect bothway for services speech and 3.1 kHz audio.
In a u-law Switch the new AMO-COP Parameter has be set on Digital Trunks leading to
an
Switch working with a-law and vice versa.
AMO-Interrelationships:
Device type:
digital trunk
Protocol variants:
Applies to all protocols