Multi-Tech Systems MT5600BR-V92 - Manual (Page 12)

2 Installation
12
MT5600BR-V92 User Guide
OOS (Busy Out) Toggle Switch
The MT5600BR-V92 contains a two-position OOS switch on the front panel. This switch can be used to
create a
“busy out” (OOS) condition for the modem (i.e., take the modem off-hook). To place a modem in
the Busy condition, move the OOS toggle switch to the (BUSY) position. The modem then goes off-hook,
its OOS and OH LEDs light, and incoming calls to this modem get a busy signal. If you suspect a problem
with a particular modem, you can use the BUSY switch to have an optional device (such as a
“hunt
group”) that looks for a non-busy line to perform a “roll over” to the next available modem while you check
the status of the Busy modem.
Out of Service/Test Jumper
When the MT5600BR-V92 is Out Of Service ( OOS), it is busy to incoming calls. In the Test (default)
setting, the modem drives pin 25 high when the modem is in Test mode. In the OOS (optional) setting, the
computer or terminal forces pin 25 high and puts the modem in a busy condition. Note that jumper
(shorting) plugs are not shipped with the MT5600BR-V92, but is provided by Multi-Tech’s Tech Support
group on request.
P7 J7 P7 J7
Test Setting (Factory Default) OOS Setting (Optional)
Dial-Up and Leased Lines
Connection to the phone system is made via RJ11 type jacks such as an RJ11C or RJ11W. It can also
be connected to an analog RJ41 or an RJ45S jack, but would not use these jack's digital dB-level
programming features. The MT5600BR-V92 is designed to transmit at a permissive level of -11dB.
To connect the modem to the phone lines, one end of the RJ11 cable that is provided with the modem
plugs into the RJ11 connector located on the back plane of the modem rack and the other end into the
phone-company-provided RJ11 or RJ11W modular phone jack. Make sure that DIP-Switch #10 is in the
UP position (default) when in dial-up mode.
Although the majority of installations involves dial-up lines, the MT5600BR-V92 also connects to two-wire
leased lines (sometimes referred to as dedicated, private, or 3002 lines) and four-wire lease lines.
To connect the modem to leased lines, first determine the type of line termination provided by the phone
company. Most phone companies provide a terminal block with a pair of screws. Some provide a
conventional RJ11 type of connector. If the RJ11 connector is used, you can use the same cable that you
use for dial-up connection. If the screw terminal type connector is used, you may need to order the
#CA167 cable from Multi-Tech Systems.
For a lease line connection, make two DIP-Switch setting changes on the modem's PC board. The first
involves placing DIP-Switch #10 in the DOWN position (changes the modem from dial-up to leased line
operation). The second DIP-Switch change requires that one of the two modems on the leased line circuit
is set to
"originate", and the other is set to "answer". To do this, change the setting of DIP-Switch #5.
When you changed the DIP-Switch #10 setting, you also changed the function of DIP-Switch #5. Now the
UP position selects answer mode while the DOWN position selects originate mode. Place DIP-Switch #5
in the UP position on one of the two modems, and on the other modem, place Switch #5 DOWN. It
doesn't matter which is which, just so you have local and remote modems in opposite modes.