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September 25, 2006 Chapter 2: Installation
LTPE-UM-3159-02 2-9
SHELF MODEM FOR SLIP OPERATION
One or more shelves can be remotely managed by connecting an external modem to the RS-232/RS-485 SLIP port.
However, when managed through the SLIP port, each shelf must be assigned a unique IP address (only one shelf is
accessed with each dial-up connection). Figure 1-6 on page 1-7 show WorldDSL shelves managed by SNMP
through SLIP.
To connect an external modem to the RS-232/RS-485 SLIP port:
4 Connect a serial cable (with pinouts as specified below) to the EMU console port connector (DB-9F) of
the local shelf.
Figure 2-7. Modem to EMU Serial Cable Pinouts
5 Plug the other end of the cable into the serial port on the back of the modem.
6 At the back of the modem, plug a dedicated telephone line into the RJ-11 port labeled LINE or TELCO.
7 Plug the modem into an external power source and turn it on.
8 Configure the EMU modem parameters for remote alarm reporting as instructed in “Modem Parameters
(Configure and Test Dial-out Alarm Reporting)” on page 3-14.
Note: See “EMU Jumper Settings” on page 2-1 for RS-232/RS-485 SLIP port configuration.
This procedure requires the use of a 25-wire straight-through cable, with a male DB-25 connector on each
end of the cable (see Figure 2-8 on page 2-10).
Step Action
1 Connect one end of the 25-wire cable to the RS-232/RS-485 (SLIP) connector on the EMS shelf.
2 Connect the other end of the cable to a standard modem.
3 If the modem has configuration switches or jumpers, set the switches or jumpers for factory default
operation. Refer to the modem user manual for more information.
4 At the back of the modem, plug a dedicated telephone line into the RJ-11 port labeled LINE or TELCO.
5 Plug the modem into an external power source and turn it on.
Step Action
!
IMPORTANT
The modem-to-EMU serial cable must have the connector pinouts shown in
Figure 2-7 to function correctly.
RD (Receive Data)
TD (Transmit Data)
GND
DCD (Data Carrier Ready)
DSR (Data Set Ready)