VG248 FAX Issues

[tonyrey]

A Fax server from Castelle connected to a VG248 is missing pages randomly. Sometimes it works and sometimes it doesn't. Specially if we receive long faxes like 14 pages we could miss one or two pages. I have disable all fax relay setting on the vg248 and on the PSTN gateways and I'm currently changing the input and output gains. Do youhave any ideas?

[gogasca]

Hi Tony,

What is the topology of the network?

Does the problem happens in both ways ? for example placing a fax from VG to PSTN

Now are you using FAX Relay or FAX passthrough ?

I have seen this when the ECM ( error correction mode ) is enable. We will need to disable ECM.

In VG248

Step 1 From the main menu, choose Configure.

Step 2 Choose Telephony.

Step 3 Choose Port specific parameters.

Step 4 Use the arrow keys to select the port to configure and press Enter.

Step 5 Choose Fax relay.

Disable ECM ( Error Correction Mode ):

Follow these steps to modify the ECM settings:

--------------------------------------------------------------------------------

Step 1 Choose Telephony.

Step 2 Choose Port specific parameters.

Step 3 Use the arrow keys to select the port to configure and press Enter.

Step 4 Choose Fax relay ECM.

Step 5 Choose disabled to disable ECM

Its already disable?

FAX in VG248:

http://www.cisco.com/univercd/cc/td/doc/product/voice/c_access/apg/vg248/v1_2/sw_confg/vg248swv.htm#xtocid15

Let me know

[chrisserafin]

I've been through MANY FAX problems with tons of Cisco hardware...

make sure

mgcp fax protocol cisco is not on....

my SOP i wrote for my self:

http://chrisserafin.com/Tutorial-vg248.doc