3825Plus Modem Installation
2-3
3825-A2-GB30-20
November 1996
DTE Connection
Use the following procedure to connect the RS-232-E
cable from the modem to the DTE:
"
Procedure
1. Make sure the modem’s rear panel power switch is
Off.
2. Connect the DB-25-P (male) connector on the cable
to the DB-25-S (female) connector labeled
COMPUTER (Figure 2-1) on the modem’s rear
panel. Use a small screwdriver to tighten the cable
to the modem.
3. Connect the DB-25-P connector on the cable to the
DB-25-S connector on the DTE. Use a small
screwdriver to tighten the cable to the DTE.
Dial-Line Connection
Use the following procedure to connect a 3825Plus to
the dial network interface.
"
Procedure
1. Insert the 6-position, 4-conductor modular plug into
the jack labeled LINE, Figure 2-1.
2. Insert the other end of the modular cord into the
dial network interface.
2-Wire Leased-Line
Connection
Use the following procedure to connect a 3825Plus
modem to the 6-pin, center pair, leased-line network
interface. A description of the JM8 to RJ11C crossover
cable required can be found in Appendix D.
"
Procedure
1. Insert the 6-position, 4-conductor modular plug into
the jack labeled LINE, Figure 2-1.
2. Insert the other end of the modular cord into the
leased-line network interface.
Telephone Connection
Use the following procedure to connect the modem to a
single-line or two-line telephone:
"
Procedure
1. Insert the 6-position, 4-conductor modular plug into
the jack labeled PHONE.
2. Insert the other end of the modular cord into the
telephone.
AC Power Transformer
Connection
Use the following procedure to connect the modem to
an ac power outlet:
"
Procedure
1. Make sure the modem’s power switch is in the Off
position.
2. Insert the power transformer’s cylindrical connector
into the modem’s rear panel ac power receptacle
labeled POWER (Figure 2-1).
3. Insert the power transformer into an ac power
outlet.
Communications Software
Installation
A personal computer commands and controls a dial
modem through communications software. This software,
which is installed on the PC, uses the AT command set to
send instructions to the modem. A dumb asynchronous
terminal, however, does not require this software since it
can directly send AT commands.
The 3825Plus can be used with any major
communications software. Refer to your software’s user’s
guide for installation procedures. For an overview of how
to use AT commands and a list of AT commands
supported by the 3825Plus, refer to Chapter 4, AT
Command Set and S-Registers.
