Tandy DCM-7 Operation Manual page 56

Connecting the DCM-7
If your telephone has the older style, four-prong connection, use an adapter
(Radio Shack Cat. No. 279-360) to connect it to your DCM-7 as shown in
Figure 7.
Figure 7. Connection to a Four-Prong Jack
If
your telephone is wired directly to the wall, the jacks and adapters neces-
sary for the conversion can be purchased from your nearest Radio Shack
store. Or, you may contact the telephone company to have modular connec-
tions installed.- The telephone company is authorized to charge you for the
installation of such jacks. The U.S.0.C. number for the plug connection
is RJ-llC.
Multi-line
The DCM-7 Modem can be used with a multi-line telephone, but you may
need a multi-line adapter (43-271), a hardware modification to the Modem,
or both.
If you use a multi-line adapter only, the HOLD button on an extension phone
can interfere with communication if someone presses it. To avoid this
pro bl em, have a qualified Radio Shack service technician modify the DCM-7.
Radio Shack has several adapters that can be used for connecting the DCM-7
to multi-line telephones. Contact your Radio Shack Computer Center or store
for details.
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