OPT 11c modem commands 1

[gary454]

We're having to replace a SEB with a US Robotics modem. I can't remember the sequence for programming the modem. If anyone knows PLEASE respond. If anyone knows which book to look in, please let me know.

THANKS!

 

[acewarlock]

I just use a dumb modem right out of the box and never had a problem.




This is a Signature and not part of the answer, it appears on every reply.

This is an Analogy so don't take it personally as some have.

Why change the engine if all you need is to change the spark plugs.

 

[911guru]

Try this:

Modem Configuration Example: US Robotics Sportster Fax modem 56K

This example refers to US Robotics Product ID 00568603. Read and follow the steps in the technical reference for the modem that you are installing.

The modem must be configured to:
• end Data hardware flow control only
• ignore Request To Send (RTS)

For normal operation of the modem that is connected to COM1 on the Signaling Server, the modem DIP switch settings are ALL UP (OFF) except for DIP switch 1 and 4 DOWN (ON).

DIP switch settings

DIP Switch 1 Down (ON) Modem ignores Data Terminal Ready
DIP Switch 2 Up (OFF) Modem displays verbal result codes
DIP Switch 3 Up (OFF) Modem suppresses display of result codes
DIP Switch 4 Down (ON) Modem suppresses display of result codes
DIP Switch 5 Up (OFF) Modem answers if S0=1 or greater
DIP Switch 6 Up (OFF) Modem sends Carrier Detect signal on serial port when carrier is present
DIP Switch 7 Up (OFF) Modem loads the previously modified and stored NVRAM configuration profile (Y0 or Y1), or the readonly factory configuration profile (Y2, Y3, or Y4)selected by the Y parameter. You must use the modem AT command AT Y0 to select NVRAM stored configuration profile 0 which has been configured to enable Send Data hardware flow control only.
DIP Switch 8 Up (OFF) Modem ignores AT commands (Dumb Mode)

DIP switch settings are read and applied when:
• The modem is powered on.
• The modem is reset by using the ATZn command.

AT Command Set
To temporarily use the AT command set on the modem that connects to Signaling Server’s COM1 port, you must:
1 Connect a terminal directly to the modem.
2 Set DIP switch 8 DOWN (ON).
3 Power the modem OFF/ON.
The modem then responds to the AT command set; however, type carefully because the modem still suppresses local echo of AT commands entered from the terminal and also suppresses display of result code OK. DIP switches 3 and 4 can be adjusted, but typing carefully will work.

Using the AT command set
1 Type AT Z4 and press Enter to reset default S registers and load factory configuration profile 1 which is the hardware flow control template. Factory profile 1 enables hardware flow control for both Send Data and
Receive Data. Note: You must disable Receive Data hardware flow control to operate the modem on the Signaling Server COM port.
2 Type AT &R1 and press Enter to configure the modem to ignore Request To Send (RTS). This disables Receive Data hardware flow control and allows you to log into the Signaling Server COM port.

3 Type AT &W0 and press Enter to store the modified hardware flow control configuration in NVRAM stored profile 0.

4 Type AT Y0 and press Enter to set Y0. If DIP switch 7 is UP (OFF) upon resetting, the modem loads NVRAM stored configuration profile 0 which enables Send Data hardware flow control only.

5 Type ATZ and press Enter to reset the modem and load the Y0 Send Data hardware flow control configuration according to DIP switch 7 UP (OFF).

6 Type AT I4 and press Enter to display the current modem configuration and verify the settings Y0, H1, and R1.

If the settings are not correct, repeat step 1 through step 6. Read and follow the technical reference for the modem you are installing to configure it for Send Data hardware flow control only.

911Guru

http://pbx-e911.com

 

[gary454]

Thanks for the help!!!!!! The modem is functioning correctly!!!