TTY Problem

[bliemsgirl]

I have a tty put onto a modem, but somehow that TTY keeps disabling itself. Any ideas what could be causing this? I have to enable the tty everytime I use it and have to keep an eye on it as well. I get DSC prompt every now and then and that seems to disable the TTY.

 

[johnpoole]

could just be a bad port in the switch, i would guess the modem is at fault, they can cause a port to die

john poole
bellsouth business
columbia,sc

 

[Firebird Scrambler]

Just leave "SCH" enabled on your modem TTY. I do this on any US Robotics 56k external modems that are connected to a Opt 11 using ports 1 or 3. Give it a try!.

All the best

Firebird Scrambler
Meridian Programmer in the UK

http://mysite.freeserve.com/firebird_scrambler

 

[Reusser]

My guess you haven't setup the modem correctly.

Any feadback from modem will disable port.

There are lots of old posts with modem setup info.

 

[bliemsgirl]

Firebird,
Will just the sch also work on a Option 61?

 

[mluckie1]

If you are on a 61 also check the DIP switch settings on the paddle board. Yes SCH will work on a 61 as well. The only thing about SCH setting on TTY means that only SCH messages will be displayed. If anyother error codes are generated they will not display on that terminal.

 

[T1PSTN]

Is the TTY port on an MSDL or the SDI board at the rear of one of the cores?

Also, try connecting to your modem directly (null-modem calble from your PC to the modem) and do the following: (works for USR Sportster and others)

1) SW 1,3,7,8 down.
2)Modem power on.

Be sure your pc com application is set at the speed of your PBX/Mail serial port.

3) Transmit at&b1&w&w1 <return>
4) Power down.
5) SW 1, 4 down.
6) Power up.
7) Connect the modem to your PBX/Mail serial port.


-T1PSTN

 

[bliemsgirl]

t1pstn,

should I do this on the US Robotics modem?

 

[atcom]

Modem setup for Meridian 1


This Procedure is for the US Robotics Sportster family of fax / modems. It has been tested with the 9600, 14400, 28800 and 33600 baud models. These commands will most likely work on other makes of modems but verify the commands and switch settings with the modem documentation before performing this setup procedure.


1. Set all switches at the rear of the modem to the down position.
2. Verify that the power switch is off.
3. Connect the modem to a PC or TTY com port using the appropriate RS232 cable.
4. Connect the power transformer to the modem and turn on the modem power.
5. If using a TTY, Go to step 9. If using a PC, Go to step 6.
6. From the Windows 95 / 98© Start Menu, Programs, Accessories, select HyperTerminal.
7. Select the icon called Hyperterm and Setup a new connection.
8. Setup the new connection to the com port that the modem is plugged into. Use the defaults that HyperTerminal provides but set the baud rate to the speed that the modem will use when connected to the Meridian 1.
9. Using either upper case or lower case (not both) type AT and press ENTER. The modem should respond with OK.
Notes: 1. You must access the modem at the same baud rate that the modem will be programmed for in step 11.
2. If there is no response from the modem, check all connections and modem power and try again. If there is still no response, type ATE1 And press enter. This allows the typed words to echo to the screen.
10. Type AT&F and press ENTER. This sets the modem to factory configuration.
11. Type AT&FE0Q1&C1&D0&K0&M0&N6TS0=1&W and press ENTER.
Note: To use a different baud rate, replace the &N6 with the required baud rate shown in Modem AT commands, next page.
12. Turn off the modem and disconnect the power and RS232 cable.
13. Set the switches at the back of the modem to 5 & 8 up, all others down.
14. Connect the modem to a Meridian 1 SDI port and a line. Make a test call. Be sure that the SDI port is optioned for the same baud rate that the modem was programmed with.

 

[T1PSTN]

Yes, if you configure the modem in that way, you're less likely to have the disabled TTY problem. I had the same issue and reconfig'ed my modems as above. The problem went away.

--T1PSTN

 

[bliemsgirl]

The modem seems to be working fine.
When I call to the modem, the modem does pick up, but I have a problem accessing the Option 61c remotely, any ideas?

 

[atcom]

Just because the modem answers doesn't mean it will communicate correctly with the switch.

 

[mluckie1]

Using a null modem adapter connect a tty cable that plugs into the modem into a terminal or tty to see if you can talk to the switch.