[cisco-voip] Remote router fax - CME

[Brian Schultz]

I can make phone calls just fine from the remote site.  The IP Phone is
registered back to HQ CME and uses the HQ trunks.  The fax machine uses its
local dial-peers and call make outbound calls out its local FXO line.

I don't believe this is a VPN issue as I have full IP connectivity between
the voice subnets across the VPN.  All ports are open across the VPN.

Do the dial-peers that I listed look correct?  I agree, it is definitely not
a fax problem.  My question is, how can I route a call to a remote site to
an FXS port with CME as the back end?  I thought I could do it with
dial-peers, but haven't had any success.



On Sun, Feb 14, 2010 at 11:07 PM, Nick Matthews <matthnick at gmail.com> wrote:

> 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
> > _______________________________________________
> > cisco-voip mailing list
> > cisco-voip at puck.nether.net
> > https://puck.nether.net/mailman/listinfo/cisco-voip
> >
> >
>
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