User's Manual
V34bis Fax-modem - AJ 2885 P
AJ 2885 P - Page 16
Power On:
Inserting the modem card connects it to the power supply of the rack. Power-on is carried out by
the power switch located at the rear of the rack.
Make sure the front panel screws are well fixed onto the chassis so that the modem card is well
connected to the AMS back plane.
2.3.
Switch and Jumper settings
2.3.1. Dumb mode : J6 jumper
When set in the ON position, this jumper disables the AT and V25Bis commands. This may be
interesting for synchronous connection, or to protect the configuration of the modem set for
answer mode.
2.3.2. SW5
switch
This switch does not apply on the FT model.
The following data terminal signals can be forced ON through these four switches :
Switch
Signal
On position effect
AT Command
SW5-1
DTR
The 108 – DTR signal from the terminal is ignored
AT &D0
SW5-2
CD
The modem provides a permanent 109 – CD signal
AT &C0
SW5-3
DSR
The modem provides a permanent 107 - DSR signal
AT %D0
SW5-4
CTS
The modem provides a permanent 106 – CTS signal
AT %C0
2.3.3. V11 – V28 terminal interface : J9 – J21 jumpers
This switch does not apply on the FT model.
The J9-J21 jumpers set the data terminal interface for :
•
V24-V28 or RS232 : jumpers in the 1–2 position
•
V11 (X21 / V35) : jumpers in the 2–3 position
In this case, jumpers J19, J20 and J21 connect a 560 Ohm impedance on the V11
receivers the the TD, XCLK and DTR signal respectively.
These jumpers are described in a dedicated appendix at the end of this manual.
