Fax Problems

[mcdtech]

Hi I have a S8700 and I am experiencing several fax issues there are several hundred faxes working of this switch and I only have problems with about 10 or so of them, they are all multi use machines ie. fax, copier, printer, fax server. all in one and most of the problem faxes are Ricoh, it seems the more advanced the fax is the more issues I have. I can send a AT&T line (POTS LINE) to the fax and forward my number to it and they all work fine. One Ricoh tech. came out and said my ringing current was low. Is there some upgrade I need to do to support these newer faxes? I am using TN793B cards with various versions from 3 to 8.

 

[dufus2506]

What's the nature of your problem?

Is it that the machines don't answer? Do they answer but not accept the fax? Do they fail midway through the transmission? Do they have trouble sending? Is it only with multiple page faxes?

Help us out here. We're not mind readers.

Carpe dialem! (Seize the line!)

 

[mcdtech]

The machines will answer and send faxes about 30% of the time when working off of my switch, it works 100% of the when working on the AT&T line. It fails to answer and send and it also will drop pages. Hope this helps.

 

[dufus2506]

What are your IP-codec settings?

Type: change ip-codec-set 1
and look on page 2.

Carpe dialem! (Seize the line!)

 

[mcdtech]

IP Codec Set

Allow Direct-IP Multimedia? n


Mode Redundancy
FAX relay 0
Modem off 0
TDD/TTY US 3
Clear-channel n 0


what should it be.

 

[dufus2506]

What you have is pretty standard.

Some people have had better luck with setting fax to pass-through. You might try that to see if it improves things.

Carpe dialem! (Seize the line!)

 

[mcdtech]

Ok I set the Codec to pass-through and it seems to have fixed this problem, but now I have some fax-servers that are not working. I changed one fax-server to station type 2500 and it seems to be working. Is this normal? or should I change it back to relay, or just fix the other problems on a case by case change of the type from Fax to 2500?

 

[dufus2506]

Fax services when any part of your system is sampling for certain Codecs can be problematic. (Which is why there are different settings.)

The trouble arises when the fax sends information faster than the codec can sample. (So some information is lost.)

Trial and error is how most people resolve these issues.

Carpe dialem! (Seize the line!)

 

[mcdtech]

This seems to happen more often on receiving faxes. Does my codec sample incoming info too? Trial and error is going to suck i bet I have over 200 different types of fax machines in this campus. There has to be some general setting that works for all faxes, because they seem to work fine when I run them on a POTS line from ma bell.

 

[Darthion]

Some of the newer multi function machines present themselves as modems not faxes. If you have CM 5.x you can set the "xoip" option on the station form for fax or modem. If you do not have CM 5.x you can set both fax and modem to pass thru.

This may not solve all of your issues, but it should reduce them greatly.

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