Installing And Connecting The 7857 Modem - IBM 300 Service Manual

Installing the NAS and Its Modem

Installing and Connecting the 7857 Modem

Figure 1-37. 7857 Front Panel
In addition to the modem and this manual, the carton should contain:
v Telecommunication cables as needed for your country:
v DTE interface / 4-wire leased line wrap plugs.
v IBM Telecommunication Products Safety Handbook, SD21-0030.
If any of these items are missing or damaged, contact the place of purchase for
instructions on how to exchange your modem or obtain the missing items. The user
is recommended to use the telecommunication cables supplied with the modem
(see "Telecommunication Cables Part Numbers" on page 1-31).
1-30
2220 Setup and Service Guide
Notes
1. If you are not familiar with the 7857 modem, refer to the IBM 7857 Guide
to Operation , GA13-1839.
2. Power and frequency requirements: 90 to 259 V ac, and 49.5 to 60.5 Hz
(no adjustment).
– Black cable:
- Switched line cable, with label SW, which fits into the PSTN socket in the
modem rear panel.
– Gray cables:
- 2-wire leased line cable, with label LL 2W, which fits into the LL socket in
the modem rear panel.
- 4-wire leased line cable, with label LL 4W, which fits into the LL socket in
the modem rear panel.