[cisco-voip] Remote router fax - CME

[Nick Matthews]

This isn't even a fax problem at all.  Until you can replace the fax
machine with a phone and make voice calls, don't even worry about
faxing.

If the question is if you can place a phone over the VPN with CME the
answer is absolutely, yes.

For VPN issues like this it is usually either a number translation
issue or a VPN/firewall ACL matching on the right subnets/ports issue.
 H323 is tcp 1720, SIP is UDP 5060, SCCP is TCP 2000 (all defaults).
CME version is pretty old, but shouldn't be a problem.

-nick

On Sun, Feb 14, 2010 at 11:04 PM, Brian Schultz <bms314 at gmail.com> wrote:
> At the HQ, there is a CME 2811 router running 3.3.  I have a remote site
> with an 881 router running 12.4(20)T4.  There is a site-to-site VPN between
> the sites and an IP Phone hanging off of the 881 with a DID from HQ which
> works fine.  I've configured a fax machine off of an FXS port on the 881.
> From the local FXO, I can plar to the FXS port for the fax and that works
> great.
>
> My issue is that I'm trying to assign a DID from the HQ site and send that
> across the VPN to ring the fax.  First, I'm not sure that this is even
> supported as I've been unable to find any documentation on CCO.  At the HQ
> router, I have DID 8518 which I am expanding to 2551 and have a voip
> dial-peer to send extension 2551 across the VPN.  When I debug dialpeer
> number, I see it correctly matching the dial-peer.  However, the call just
> goes to a fast busy and I never see the call hit the remote 881.  Has any
> tried to do something similar to this and got it working?  Everything is
> working on the VPN and I have verified voice subnet to voice subnet
> traffic.
>
> **HQ**
>
> num-exp 8518 2551
> !
> dial-peer voice 2000 voip
>  description ** Remote Fax Machine **
>  destination-pattern 2551
>  session target ipv4:192.168.254.254
>  dtmf-relay h245-alphanumeric
>  codec g711ulaw
>  no vad
>
>
> **Remote881**
>
> dial-peer voice 2551 pots
>  description ** Fax Machine FXS **
>  destination-pattern 2551
>  port 0
>
>
> Thanks,
> Brian
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