08-03-2010 02:47 AM - edited 03-16-2019 12:03 AM
Hello,
I use a vg224 with sccp & fax-protocol cisco. Faxes national work but with one international fax number it doesn't work. When i use a direct line it works.
I don't know what's going wrong. When i use a phone with the same css, i can call the fax. Receiving faxes from the international destination is no problem. Can anyone help me?
With kind regards
Martijn.
08-03-2010 08:28 AM
Does the voice call setup? First thing to make sure is that you can bring up a voice call, before you worry about switchovers.
Is it an inbound or outbound international call that fails? It could be the plan/type presentation of the number if it is failing outbound. Look at your call signaling.
If the call is being established, it's a switchover issue, and if you can post your configs for the PSTN gateway and the fax gateway I can take alook.
Also, I personally wouldn't recommend Cisco Fax relay, which which what is sounds like you are using. If you're going to a Cisco PSTN gateway, you should use modem passthrough or T.38.
-Steve
08-10-2010 01:35 AM
Hi Steve,
I tried modem passthrough. That didn't change anything. The problem accurs with slovakian numbers. The problem is from our costumer to slovakia. From slovakia to the costumer works. We tried also other slovakian numbers, they didn't work either. Faxes to other countries do work. (i tried Belgium & UK).
ISDN dialplan issue???
08-10-2010 06:46 AM
I looked at the configurations, and I only see Cisco fax relay on the VG224, and nothing on the PSTN gateway. Maybe you made the modempass configuration changes after this, but you should have:
You should first configure this for both devices:
On the VG224:
voice service voip
fax protocol none
modem passthrough nse codec g711ulaw
Yes, the issue could be an ISDN plan/type issue, if the call isn't connecting on that specific number. You need to do some troubleshooting or run some debugs to find out where the fax is failing, and direct attention there.
Run the following debugs for a failure:
debug voip rtp session name
debug voip ccapi inout
debug isdn q931
08-03-2010 09:27 AM
Hello Martijn,
I do not know if it can apply to your conditions, but I have been facing similar symptoms in the past. It was due to bug CSCsm49011.
1st Found-In http://tools.cisco.com/Support/BugToolKit/images/Field%20Definitions.html 12.4(4)T5 / 12.4(11)T6.....
Fixed-In http://tools.cisco.com/Support/BugToolKit/images/Field%20Definitions.html12.4(15)T4 / 12.4(19.3)T..
Best regards
Karim
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