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fax sending problems

- we have local offices with 2801 and 2821 routers, IOS 12.4(8) with CCM 4.1.

- the fax (Panasonic KX-FT906, KX-FT25 or Canon FAX-B110) is connected to the FXS analog (VIC2-2FXS) port of the 2801 router.

- when a call is placed to the remote fax, the call is routed to the ISDN BRI port (VIC2-2BRI-NT/TE) and not to IP cloud (The control packets go to the CallManager, which says to the FXS port to communicate directly with the BRI port. The data packets travelling directly between the FXS and BRI ports)

- the call is set up and the caller begins to transmit the page(s)

- at the remote site the called fax begin to print out the received page(s)

- after the last page sent the caller shows "Transmisson error"

- it looks like the faxes do not change after the last page sent a normal "end-of-session" message that may be interpreted by the caller as a transmission error

- it looks like the router brakes down the call before this exchange of this "end-of-session" message take place

2 REPLIES
Silver

Re: fax sending problems

You might be running into a bug here. Check this Bug-Id: CSCdk13133

Re: fax sending problems

Are you running H323?

Did you configure Fax-Relay or Fax-Passthrough?

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