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September 25, 2006 Chapter 2: Installation
LTPE-UM-3159-02 2-7
REMOTE TERMINAL AND LOCAL SHELF MODEM CONNECTIONS
Remote management of one or more Multishelf TAO sites over a telephone network requires the connection of a
modem to the remote management station and to the EMU residing in the local shelf of each site. Once connected,
the remote management station can access the console menus of one or more multishelf networks to configure,
monitor, and test their EMU and DSL circuits. The local shelf can autonomously report alarms to the management
station through the modem attached to its EMU.
Management Station Internal Modem
An internal modem card provides an RJ-11 jack at the back panel of the management station. If the management
station has an internal modem, plug your phone-line connector into the RJ-11 jack and turn on the management
station. Set up the internal modem for 19,200 baud. If you experience problems, refer to your modem or
management station user manual.
Management Station External Modem
An external modem requires a serial cable, an external power source, and an unused serial port on the back of the
management station.
To connect an external modem to your management station serial port:
Local Shelf Modem for Multishelf TAO
The local shelf in a remotely managed Multishelf TAO network uses an external modem connected to its EMU
console port. The modem, however, must be programmed with a PC before it can be connected to the EMU (the
EMU residing in the shelf cannot control a modem as a PC can).
Step Action
1 Plug a serial cable into an available serial port on the back of the management station, using a 9-to-25 pin
converter or gender changer if necessary.
2 Plug the other end of the cable into the serial port on the back of the modem.
3 At the back of the modem, plug the telephone line into the RJ-11 port labeled "LINE" or "TELCO".
4 Plug the modem into an external power source and turn it on, then turn on the management station.
5 Verify that the modem is responding to commands from the management station. Use a communications
program to send an AT command to the modem. The modem responds with the string "OK" if operation is
successful.
6 Configure the shelf modem for remote alarm reporting as instructed in “Remote Alarm Reporting” on
page 3-17.
7 If you experience problems refer to the modem or management station user manual.
Note: The shelf modem can be attached to the EMU in any shelf. The shelf with the modem attached is the
“local” shelf. If managing a shelf through its SLIP port, see “Shelf Modem for SLIP Operation” on page 2-9.