Nortel Meridian 1 Manual page 159

Connecting a system terminal (or modem) Page 121 of 500
A dispatch or call back modem, normally connected to the SDI port, can be
used if it meets the requirements. If you want to use a modem of this type that
does not meet the requirements, the modem can only be used in addition to a
modem that does meet specifications.
Any modem that meets the required specifications should be compatible with
options 51C, 61C, 81, and 81C. The following models have been tested and
verified as compatible:
— Hayes V-series ULTRA Smartmodem 9600
— UDS FastTalk V.32/42b
— US Robotics Courier HST Dual Standard V.32bis
The UDS FastTalk modem is available through Northern Telecom as part
number A0381391. The modem is equipped with a 6-ft power cord for a
standard 110 V ac wall socket and a cable that connects to an RJ11C jack.
(The A0377992 Black Box ABCDE-Switch can be used with the UDS
FastTalk modem.)
System installation procedures