[c-nsp] Cisco one-way voice problem

[Eric Knudson]

since he's doing it all on the same box (nat & voip) I would think
this would work if he just added an "h323-gateway voip bind" to the
dialer or ethernet. I would bind it to the 'outside' ip address, which
may not be feasible in the long term since he's got dynamic addressing
from his isp - Saad, can you test this?


On Mon, 20 Dec 2004 14:00:30 +0900, Mick Hastings
<mick_hastings at yahoo.com> wrote:
> Hi,
> 
> Im no expert but I hear that this is a very common probelm with VoIP and
> NAT.  Something to do with the upper layer protocols dynamically assiging
> UDP ports for RTP.
> 
> look at another list on here called gmane.comp.telephony.pbx.asterisk.user,
> there is a lot of info about VoIP and one way audio there.
> 
> cheers,
> Mick
> 
> "Saad" <saadbutt at mail.com> wrote in message
> news:41C31D29.A69ED73D at mail.com...
> >I have a small remote office VoIP setup and I am facing a problem. I am
> > using a Cisco 2612 Router with NM-2V module. One FXO and one FXS card is
> > installed on the voice module. The internet access is through ISDN line.
> >
> > The problem that I am facing is that when I make calls to the router to
> > any of FXO or FXS interface the office people can not hear me. On the
> > other hand when the office guys call me I can hear them but they cant.
> > I am pasting the ISDN dialup and voice port configuration here. Could it
> > be access list problem or something else?
> >
> >
> > interface Ethernet0/0
> > description connected to EthernetLAN
> > ip address 192.168.0.101 255.255.255.0 secondary
> > ip nat inside
> > half-duplex
> > !
> > interface TokenRing0/0
> > no ip address
> > shutdown
> > ring-speed 16
> > !
> > interface BRI0/0
> > no ip address
> > ip nat outside
> > encapsulation ppp
> > dialer rotary-group 1
> > isdn switch-type basic-net3
> > no cdp enable
> > !
> > interface Dialer1
> > ip address negotiated
> > ip nat outside
> > encapsulation ppp
> > no ip split-horizon
> > dialer in-band
> > dialer idle-timeout 0
> > dialer redial interval 60 attempts 5
> > dialer string 10001001
> > dialer hold-queue 10
> > dialer load-threshold 1 either
> > dialer-group 1
> > no cdp enable
> > ppp authentication chap pap callin
> > ppp pap sent-username test password 7 03105E080E
> > ppp multilink
> > !
> > ip nat inside source list 1 interface Dialer1 overload
> > ip classless
> > ip route 0.0.0.0 0.0.0.0 Dialer1
> > no ip http server
> > !
> > access-list 1 permit 192.168.0.0 0.0.0.255
> > dialer-list 1 protocol ip permit
> > !
> > snmp-server community public RO
> > snmp-server enable traps tty
> > !
> > voice-port 1/0/0
> > !
> > voice-port 1/0/1
> > !
> > voice-port 1/1/0
> > ring number 4
> > !
> > voice-port 1/1/1
> > ring number 4
> > !
> > dial-peer cor custom
> > !
> > !
> > !
> > dial-peer voice 1 pots
> > destination-pattern 101
> > port 1/0/0
> > !
> > dial-peer voice 2 pots
> > destination-pattern 102
> > port 1/0/1
> > !
> > dial-peer voice 3 pots
> > destination-pattern 103T
> > port 1/1/0
> > !
> > dial-peer voice 4 pots
> > destination-pattern 104
> > port 1/1/1
> > !
> > dial-peer voice 100 voip
> > destination-pattern 34T
> > session target ipv4:80.32.170.82
> >
> >
> > _______________________________________________
> > cisco-nsp mailing list  cisco-nsp at puck.nether.net
> > https://puck.nether.net/mailman/listinfo/cisco-nsp
> > archive at http://puck.nether.net/pipermail/cisco-nsp/
> >
> 
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
>