Using the Internal Modem | 45 |
Connection procedures |
Analog or digital?
❖If you are not sure which type of line a particular line jack offers, assume that it is digital and do not connect the internal modem to it.
❖If the wall jack is known to be connected to a PBX (Private Branch Exchange) system, then the line is digital. Do not connect the modem to it.
❖If a (working) telephone connected to the wall jack has an REN (Ringer Equivalency Number) printed on its label, then it is an analog phone. If the phone is working correctly, then the wall jack itself is analog.
❖Telephones in an office environment are commonly connected to digital phone lines.
❖Unfortunately, the wall jacks for both analog and digital phone lines use the familiar RJ11 connector as shown on page 46. If you are not sure that an RJ11 jack terminates an analog phone line, do not connect the modem to it.
Connecting the internal modem
CAUTION: In the event of a lightning storm, unplug the modem cable from the telephone jack.
A standard modular cable is supplied with the internal modem. Follow the steps below to connect the internal modem to a telephone jack.
1Turn the connector so that the small connecting lever faces down.
2Squeeze the lever and plug the connector into the computer’s modem port.
3Plug the other end of the cable into an RJ11 wall jack.