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TRF-B13 ETU
The Trunk Transfer (TRF) ETU allows an analogue trunk to be used as the incoming or
outgoing trunk in a Call Forward External operation. Note that the outgoing trunk must
be provided with Line Reversal on Answer or Line Reversal on Idle (depending on the
application) by the service provider. The TRF ETU is not required however, if both
trunks are ISDN. One TRF-B13 ETU can be installed in the system, providing one
trunk transfer circuit.
To install the TRF-B13 ETU:
1.
2.
3.
4.
5.
6.
7.
Trunk Transfer Speech Volume Adjustment
Refer to Table 2-3: TRF-B13 ETU Switch Settings, Pg 73, and Table 4-4: CO/PBX Line
Loss Compensation, Pg 73 if speech volume during a transferred call is too low.
When operating with Auto Level Control and Voice Switches OFF, take note of the
following points during transmission tests. If satisfactory settings cannot be achieved
under the following conditions, operate with the Voice Switch ON.
1.
2.
3.
4.
72
Ensure hat the system is turned OFF.
Remove the cover from the KSU.
Carefully remove the ETU from its packaging, using a wrist strap connected to the
frame ground on the KSU to avoid static discharge.
Locate connector CN8 (marked TRF) on the mainboard and slide the ETU
between the posts. Press the ETU down firmly to lock into place.
Replace the KSU cover.
Turn the system ON.
Program the system as required.
If the incoming trunk receiving volume is too low, change the G11/G12 switch
setting to one level higher.
If the transfer destination trunk receiving volume is too low, change the G21/G22
switch setting to one level higher.
If the incoming trunk receiving signal contains a 'booming' noise, change the G11/
G12 switch setting to one level lower.
If the transfer destination trunk receiving signal contains a 'booming' noise,
change the G21/G22 switch setting to one level lower.
Figure 2-34: TRF-B13 ETU
Installation Manual, Chapter 2 – KSU Installation
A6-506000-642-01(8508), Release 6.0, November 2003
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