Connecting And Disconnecting The Telephone Line - HP 82718A Expansion Pod Reference Manual

•
Introduction
• Telephone number of the line to which the modem is connected
• Manufacturer: Hewlett-Packard
• Model Number: HP 82718A
• FCC
registration number: AU492X-12571-DM-E
• Ringer equivalence number: 0.8 B
The FCC registration number and the ringer equivalence number are located on the bottom face of your
HP 82718A.
If you plan to connect the HP 8271 8A to different telephone lines, furnish the telephone company with a
list of these numbers to avoid notifying them every time you move your unit. Notify the telephone
company again when the HP 8271 8A is permanently removed from the line.
Connecting and Disconnecting the Telephone Line
Turn off the modem before plugging a phone line into either modular jack on the HP 82718A. Also turn
off the HP-75 unless your application program needs to prompt the user to connect the phone line. The
modem can be turned off either by turning off the HP-75, by executing
t'10DEt'1 OFF,
or by executing
I H IT I
FI
LIZ E ": t' 1
I]
Dt' 1 11 .
To connect the modem to the telephone network, you will need a cable with modular telephone plugs on
both ends and a modular telephone jack. If your telephone jack has four round holes, you will need an
adapter plug that converts your jack from four-prong to modular. Cables and jacks are available from
electronics stores or the telephone company.
If you want to plug the HP 82718A into a modular jack into which a telephone set is currently connected
(that is, if you want to replace a telephone with the HP 82 718A), the telephone should have the same kind
of modular jack as the modem. Unplug the cable from the telephone, then plug the loose end of the cable
into either of the two jacks on the rear panel of the HP 8271 8A.
The plugs on the cable can be inserted into the jacks in only one way. The small plastic tab will snap in
when the plug is properly connected. When you pull gently on the cable, it should not pull out of the jack
until you press the plastic tab.
You may wish to share a single wall jack between a telephone set and the HP 8271 8A, and use the modem
as an auto-dialer for voice communications, or the telephone as a line monitor for data communications.
You may do this by purchasing an extra cable with modular plugs on each end from an electronics or
telephone supply store. Connect one end of the extra cable to the second jack on the HP 82 718A and the
other end to the telephone, as shown in the figure. Note that you cannot simultaneously carryon a voice
call and use the HP 82718A modem. However, you can listen to the HP 82718A transferring data on the
telephone set.
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