Terminal Emulator settings for modem

[chancal]

Hello everyone,

I use SecureCRT to dial into my option11s. My settings are port speed-9600, data protocol-disabled, compression-disabled, flow control-hardware, data bits-8, parity-none, stop bits-1, modulation-non standard. i am also making it emulate a VT100 terminal. This all works fine.
BUT...
i just moved the PRI that the modem dials out from so that it now goes through a cisco 2821 gateway. on my gateway i am pretty sure i have configured it correctly for modem passthrough (nse codec g711ulaw maximum-sessions 2) etc.
but problem is that when i try dialing in now, all i see is gobbledy-gooke running down the SecureCRT window. note that all my regular phone calls work fine going through the 2821.
i have tried all the other port speeds: if it is too low the call doesnt even connect if it is too fast i cant even make out the nortel banner or prompts at all, whereas with 9600 i can at least see them.

Is there another setting change i need to make in secureCRT?

please help thanks

 

[Avaya911PLM]

If you just moved the trunk, NO CHANGE in your SecureCRT should be required.

I would look to the 2821 for the issue.


--
Fletch

Nortel Emergency Services PLM

http://nortel.com/e911

Check out this month's E911 Talk podcast at Nortel E911 Talk Podcast

 

[johnpoole]

try sending a fax across that same route.. i agree, it' not the crt

john poole
bellsouth business
columbia,sc

 

[FireFighter78]

Have you tried 9600 7-E-1?

 

[Avaya911PLM]

Personally, I think chasing the terminal settings are a bad path to take. You had a working connection, you changed the trunk, and the connection is now broken. The Trunk is the obvious culprit.

Modem and fax calls are actually audio. The 2 faxes or modems communicate with each other via their own digital language of beeps and squeals. VoIP compresses the audio using various CO-DECs. These CO-DECs are often the problem with Voice or Data over VoIP calls as the audio is changed slightly during transport.

Here's an interesting proof point.

Have your modem call your desk phone and watch the terminal screen closely.
Answer the phone and do your best 'modem imitation' with your voice.
Watch the computer screen, you will actually see garbage characters come across ;-)

Speed, parity and stop bits are all attributes. Modifying these wont really help the situation.


--
Fletch

Nortel Emergency Services PLM

http://nortel.com/e911

Check out this month's E911 Talk podcast at Nortel E911 Talk Podcast

 

[FireFighter78]

By default my Option 11 wants 7-E-1 and if I remember correctly I can only change the speed of the connection on Port 0 none of the parameters.

When we were running an Option 21 our terminal program said it was 8-N-1 but when you looked at the settings on the 21 it was clearly 7-E-1 (if I remember correctly it was dip switches on the serial card).