28i/124i
Remote Modem Installation Instructions
5
To send and store the INIT string in the site modem:
1.
Type
AT&F
and press
Enter
to default the modem.
OK will display on the screen.
2.
Enter the following initialization string (spaces shown for clarity):
AT Q1 &C1 &D0 &S1 S0=1 E0 &W0 &W1
and press
Enter
.
For earlier CNet modems (P/N 85862, 85862A, 85862B, 85862C) use:
AT Q1 Y1 &C1 &D0 &S1 S0=1 E0 &W0 &W1
and press
Enter
.
3.
To view all the modem settings and check the INIT string, type
AT&V
and press
Enter.
The INIT string you sent in step 2 is contained in the data that
displays. Review the displayed Active Profile, Stored Profile 0 or
Stored Profile 1 data to be sure your entries were correct. (Not all
types of modems are compatible with all these commands and will
disregard the entries for some items.)
Close the HyperTerminal Program. You do not need to save the
modem file created.
Now that the site modem is properly initialized, you must disconnect it from your
laptop and connect it to the system.
Disconnecting the modem from the laptop:
1.
Turn the site modem off.
The INIT string you sent previously will automatically be loaded from
the modem’s memory when you turn it back on.
2.
Unplug the cable from your laptop and the modem.
2. Connecting to the System
1.
With the system power turned off, pull the CPRU PCB out of the system.
With the 124i system, make sure the mode switch on the CPRU is set
to the “HOT” position to retain the customer information. The 28i will
automatically retain the customer information unless the “COLD” switch
is held down during power up.
2.
Plug the LAPB Remote Programming Module into the header on the CPRU PCB.
3.
Reinsert the CPRU into the system cabinet and turn the power back on.
Modem Connection
1.
Using the correct cable configuration for a modem setup (28i=92708-DB25,
124i=92009-DB25), connect the DIN connector on the cable (28i=P/N
92707A, 124i=80893) to the LAPB card.
2.
Connect the 25-pin adaptor to the opposite end of the cable.
3.
Plug the connector into the 25-pin female connector on the modem’s cable set
(shipped with modem). Plug the 9-pin male connector at the opposite end of
the modem’s cable set into the modem.
4.
Plug one end of a modular line cord into the
LINE
jack on the back of the modem.
5.
Plug the other end of the modular line cord into a modular jack connected to an
ASTU port or other dial tone source (such as an outside line).
6.
Turn your modem back on.
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