Specifications

93
Configuring for PABX Operation
Then the caller may enter the pager code. Ask your telephone expert which type of trunk
you are using (describe the sequence of events above if they do not recognize the terms
“senderized” or “store-and-forward”), then instruct your callers as to how to use the
system.
The Table 6 may assist you in interfacing the Model 2200 to the PABX for trunk access. A
PABX can normally provide a loop start trunk or End-to-End overdial station line. The
best connection is normally loop start trunk since the paging terminal can tell the PABX
when the call is finished (in end-to-end this is done by timeout which wastes trunk
handling time). Some PABXs have electronic telephones that do not provide DTMF tones
for overdialing, so End-to-End does not work there either. Some PABX operator consoles
are electronic and do not provide DTMF tones for overdialing; again End-to-End does not
work there.
Most of the time, a loop start trunk connection from the PABX will provide DTMF tones
since this type of trunk is often used for “outside line” access to a Telco central office
which requires Touch-Tone. Some PABXs can use E&M signaling for these trunks. As
Table 6 shows, Zetron supports E&M Type I with 2-wire audio. Call Zetron Technical
Support for assistance with your telephone PABX installation.
Table 8: PABX in relation to E&M support
PABX Brand
and Type
PABX Card
and Straps
Zetron Card
and Straps
Supported Features
Northern Telecom
SL-1
SL-1XN
QPC-219
QPC-450
702-9037, -9117
E-E GND Start
Same as QPC-219
Calling Party Disconnect
Rolm CBX M/N-8557 702-9037, -9117
DID
Calling Party Disconnect
AT&T Dimension LC08 702-9037, -9117
E-E GND Start
Calling Party Disconnect
Note For E&M Tie-Trunk applications, the Facility Interface Code (FIC) is
a TL-11E for the Zetron end, and a TL-11M for the telco end. Zetron
requires 2-wire audio with a cable size of five wires. Refer to
Trunk
Card Specifications (702-9037 and 702-9117)
on page 18 for the
FCC registration numbers.