Specifications

Chapter 2 — Hardware Settings
8 Data/Fax Rack Mounted Modem Card Configuration Guide
Switch
Function
Position
Effect
10
Dial-Up*/Leased-Line
Up*
Dial-Up Operation
Down
Lease Line Operation
11
No affect in async
External Clocking (Sync)
Up
External Clock
Internal Clocking*(Sync)
Down *
Internal Clock
12
Sync Mode
Up
Synchronous Operation
Async Mode*
Down *
Asynchronous Operation
DIP Switches 13-16
*Factory default setting
Switch
Position
Effect
13/14
Up/Up*
D Read from stored parameters for speed (Default V.92)
Down/UP
V.34 Operation
Up/Down
V.32b Operation
Down/Down
V.22b Operation
15
Up*
CD/DSR from Interface
Down
CD/DSR Forced On
16
Up
2-Wire Operation
Down
4-Wire Operation
OOS (Busy Out) Toggle Switch
The front panel has a two-position out of service (OOS) switch. Use this switch to take the modem off-hook,
which creates a busy condition for the modem.
● Move the OOS toggle switch to BUSY to take the modem out of service. The OOS and OH LEDs light and
incoming calls get a busy signal.
If you suspect a modem is not working, use BUSY to have an optional device, such as a hunt group, roll the call to
the next available modem while you check the busy modem.
Out of Service Test Jumper
When the MT5600BR-V92 is out of service, it is busy to incoming calls. In the Test (default) setting, the modem
drives pin 25 high when the modem is in Test mode. The OOS (optional) setting forces pin 25 high and puts the
modem in a busy condition.
Note: Jumper (shorting) plugs do not shipped with the MT5600BR-V92, but Multi-Tech Technical Support
will provide jumper plugs on request.
Test Setting (Factory Default)
OOS Setting (Optional)