17.72. T4WA - Level switching on T reference point for device
class TMA4WIRE 
Feature:
T reference point matrix
Function:
The level values administered in a loaded T reference point matrix for the device
class
"TMA4WIRE - tie trunk circuit 4 wire analog" are switched to the ports involved in
the
connection during the seizure phase in the receiving direction if the T4WA parameter
is set
in the COT of an analog tie trunk circuit.
If the parameter is not set for these trunk types or other tie trunk circuit types,
then
the level is switched until a defined type of connection is received with the values
assigned for the UNDEFDEV device class.
AMO Interrelationships:
TREF ... Administer T reference point matrix
Device types:
The device class TMA4WIRE includes the following analog interface circuits and tie
trunk
circuits, for example:
DEV=TSEML1, DEVTYPE=TT ..... Both way tie trunk circuit for carrier frequency on special
inter-PBX trunk; TMSVF module: CO trunk circuit for tie trunk circuit traffic with
tone
selection
Parameter T4WA should be set on these devices.
Protocol variants:
ANALOG - Protocols for analog trunks