7.5 Connecting an Internal Modem to Telephone Lines
NOTE:
The DFA01 modem is available for U.S. and Canadian
customers. Depending on the country you live in, the Telecommunication
Administration (PTT) may not let you connect private integral modems to
the public switched telephone network. Call your Digital representative for
information on modem availability in your country.
7.5.1 DFA01 Modems
The DFA01 module contains two modems, A and B. Each requires its own
telephone.
Each DFA01 modem connects to one of the following dial-up telephone
services.
• RJ11C (United States) and CA11A (Canada) standard single-line
telephone service. The switchpacks are factory set for that service.
If you have it, you have one wall-mounted modular telephone jack per
telephone.
• RJ12C/RJ13C (United States) and CA12A/CA13A (Canada) telephone
service. The switchpacks are factory set for that service. If you have
it, you have one wall-mounted modular telephone jack per telephone.
• RJ41S/RJ45S (United States) and CA41A/CA45A (Canada) data jack
telephone service. If you have it, you have two wall-mounted modular
telephone jacks per telephone.
NOTE:
If you do not know which telephone service you are using, call your
telephone company.
7.5.2 RJ11C/CA11A, RJ12C/CA12A, and RJ13C/CA13A Telephone
Service
Use the following procedure to connect the DFA01 modem to RJ11C/CA11A,
RJ12C/CA12A or RJ13C/CA13A telephone service.
1. Disconnect the telephone line from the wall-mounted modular telephone
jack. Leave the other end of the telephone line connected to the
telephone as shown in Figure 14.
24
VAX 4000 Model 200 (BA430) Installation
