Hi all.
I'm in a trouble with a fax machine connected to an uc520 fxs voice port.
Incoming fax doesn't works well, because at the middle of transmission it gets failed and then fxs port gets blocked until I reset it to get it working again.
I've tried with two different uc520 machines with its default configuration plus an incoming call translation-rule in order to forward all incoming calls to voice port 0/0/0 which its fax machine connected.
If I connect an analog phone to this port it works okay.
Any idea?
Could it be a localization problem? I'm in Spain.
Thanks in advance.
Solution
Hi,
I had these lines:
network-clock-participate wic 1
network-clock-participate wic 2
I add this one:
network-clock-select 1 BRI0/1/0
Eureka
About my post on Wed, 06/25/2008, to simplify, I left "fax rate disabled" in voice service posts but delete all lines "fax rate disabled" in dial-peers (pots and voip)
FL
A bug is the problem
Hi all, dapunnisher is right.
Cisco TAC tells me the same issue.
There's a bug in IOS software for uc500 series.
By now, the only way to get fax working properly is to configure FXO port without SCCP.
To do that you must:
- deactivate all ephone-dn corresponding to FXO ports
- shutdown all dial-peers corresponding to FXO ports
- add new dial-peers for FXO ports with the corresponding destination-patterns, for example:
dial-peer voice 666 pots
destination pattern 301
port 0/0/0
Since I have done that, fax works properly.
on the plus side
deactivating SCCP on that FXO port frees up a Phone license :)
fax problem in fxs port
Hello,
I have same problem with a fax machine connected to fxs port 0/0/0. I have followed ours suggestions:
voice service voip
...
fax protocol none <<<
!
voice-port 0/0/0
disconnect-ack
no battery-reversal
no comfort-noise
cptone ES
description --- FAX ---
...
fax rate disabled in all dial-peer (pots and voip). Also in voice service pots
voice service pots
text relay fax rate disable
fax rate disable
!
...
Also disabled service stcapp in dial-peer 1
dial-peer voice 1 pots
destination-pattern 123456789
fax rate disable
port 0/0/0
...
When the fax call arrives, fax machine negotiates multiple speeds 1400 1200 9600. Fax machine print multiples pages, one per speed, all with errors, some betters than others.
Any idea?
zanx
fax protocol none
Hi
I had the same problem so I made a TAC and after little over a weeks communication with the tac-supporter we found the solution.
Config t
voice service voip
fax protocol none
And now we don't have any problems!
There is an unreported bug with XW series IOS
There is an unreported bug in the XW IOS series code that runs on the UC520 where if an FXS port is configured to be controlled by STCAPP and a fax or modem is attached, he port will break. Analog phones plugged into the same port will function normally.
I found this out the hard way while troubleshooting a faxing issue on a CME. The information I recieved was from a senior TAC engineer. The workaround is to configure the FXS ports to be H.323 controlled instead of using SCCP.
-Dapunisher
A+. Network+, MCP, CCNA, CCVP
Geek Chic! ----> www.WeGeek.com
Disable fax rate
Hello,
had same problems. You have to "fax rate disable" on all dial-peers and
network-clock-participate wic x
network-clock-select 1 bri x/x/x
fax problems
Hi,
I am having something similar as you see below. do you think the suggestion in this post could also help me??
I have connected a Fax machine to a FXS port 0/0/0. I am able to receive incoming faxes continually however once I send an outgoing fax it is received by the destination fax machine but I am then no longer able to receive incoming faxes. I can fix the problem by doing a shut no shut on the voice interface 0/0/0 but again once I send an outgoing fax all incoming faxes fail with the call not being answered even thought the port 0/0/0 is ‘on hook’. Any help would be great.
Trying 2
You are right, ECM is not the problem.
I only get better results configuring fax down to 9600 bps speed.
I will try now network-clock-select command. I thought that it only applies to PRI.
Thanks.
Trying
Thanks for suggestions.
I have a BRI line.
I will try to disable ECM.
ECM is not the problem. As
ECM is not the problem. As mentioned before you need network-clock-select to the BRI port.
Are you using ISDN BRi or
Are you using ISDN BRi or PRI? If so you need to configure network-clock-participate and network-clock-select, else fax will fail in the way you've described.
Try disabling error correction on the fax machine
Most fax machines have some kind of error correction built-in (different manufacturers call it different things). I have found that disabling this feature makes the fax machines work more reliably on the UC500 FXS ports. Usually the error correction is disabled via a setup/configuration menu on the fax machine, but different models handle it differently. Not sure if that will help in your case, but it can't hurt to try - you can always re-enable it if it doesn't help.