11-15-2004 01:48 AM - edited 03-15-2019 03:07 AM
Hi!
Help me, please.
I use CCM_3.3(4)sr2 and PIX525_soft_6.3(1).
Scheme:
PSTN -> Voice GW(from ISP) -> PIX(my) -> CCM(my).
IP Adress:
phone number -> 10.1.0.2 -> X.X.X.X -> 172.16.0.3
If incoming call were from other CCM then all ok.
If incoming call were from PSTN, then I listening ringin my Cisco IP Phone, but I don't hear anything.
In PIX logs:
Message CALL PROCEEDING received from 172.16.0.3/1720 to 10.1.0.2/13923 before SETUP
What is the problem?
Excuse me for my English.
11-15-2004 01:59 AM
Where is the other CCM? Also outside the firewall?
If so then (unless you have different rules set for the gateway) it sounds like you have a one-way voice issue on the Voice GW... If this is an IOS router have your ISP make sure that:
1) the 'IP routing' command has been entered into the gateway
2) the 'h323-gateway voip bind srcaddr
See this link for more info:
http://www.cisco.com/en/US/tech/tk652/tk698/technologies_tech_note09186a008009484b.shtml
11-15-2004 02:27 AM
>Where is the other CCM? Also outside the firewall?
Yes!
Yes. My ISP using Cisco 5xxx series router Voice GW
But when calling entered my phone number, Hi listening from robot: "This number temporaly not working". And Hi doesn't listen ringing!
01-07-2005 07:39 AM
It may be the problem with your PIX and the Skinny.
Do you have the fixup command on your PIX for the Skinny protocol.
Also I hope when calls originate and terminate in the same Cisco cluster you are not passing those through the PIX.
Cisco 5XXX series dont support voice.
01-08-2005 03:59 AM
Yes, fixup command exists in PIX for h323, skinny, etc.
we have Call manager cluster, running at stand-alone cluster mode, behind two PIX firewall running in failover mode. Are you saying that Cisco Call Manager clusters have some problem if they are behinde a PIX firewall?
we don't see any problem while two 1760 VG calls each other through PIX.
However, one AS5400 gw calls any gateway( 1760 or other AS5400) through PIX, it fails. AS5400 could not get q931-alert packet from remote gateway so we could not hear any ring or voice .
What do you mean by saying "Cisco 5XXX series dont support voice."
01-08-2005 09:50 AM
Can you post your PIX configs please.
We had some skinny firewalling problem with FWSM before which was resolved by Cisco with a special patch.
Also the previous post says their ISP uses Cisco5XXX voice routers. As far as I know theres no 5xxx series router in Cisco also if there is such router it doesnt support voice.
01-07-2005 01:07 AM
Hello,
I read your problem. We have similar problem working with PIX. Could you solve it? If so, could you please explain how you did it?
Tahsin Bekdemir.
Network Admin.
01-11-2005 06:25 AM
Hi
I fixed this problem.
My ISP is using Cisco Voice Gateway.
After my ISP entered command:
"ip tcp path-mtu-discovery" on Voice GW
all working.
01-11-2005 08:08 AM
Hi unicom,
after your e-mail, I tried it in our case also, then it solved our problem also.
Thank you very much...
Tahsin.
01-11-2005 11:31 PM
Not at all.
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