User`s guide

2
Customer-Supplied Equipment
The following customer-supplied equipment is required to complete a data
communications system using a 3825Plus modem:
H A DTE (a computer or a terminal) with an available RS-232-E serial port.
H A shielded RS-232-E cable with a male DB-25 connector at one end to attach to
the modem.
H One of the following modular dial or leased network interfaces:
— RJ11C or RJ14C for dial applications
— JM8 for 2-wire leased network interface
H For leased-line applications, a JM8 to RJ11 crossover cable.
3825Plus Installation
Before installing your standalone modem, make sure your installation site is clean and
well-ventilated. Allow space around the modem for installing cables and telephone
cords, and make sure the modem is located within reach of an ac power outlet.
The rear panel of the 3825Plus modem has the following switches and connectors:
H An ON/Off power switch.
H A power receptacle for ac power transformer.
H A 25-pin DB-25 receptacle for your DTE (computer or terminal). The distance
between your modem and DTE should not exceed 50 feet if DTE data rates
exceed 19,200 bps.
H A 6-pin modular jack for external telephone set use only.
H A 6-pin modular jack for dial (PSTN) lines or 2-wire leased lines.
On/Off
Power
Computer
Phone
Line
Customer-Supplied
Cable
495-14695
PC
Customer-Supplied
Cable
Dial or
Leased-Line
Network
Interface