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New Member

One way voice on FXS Card

We are currently deploying a CCM 4.2 system. Each of our offices has an FXS port for paging. We placed a standard phone on the line and used it to call a local extention and it works fine. When we try to call to our corporate office, they can hear me but I can't hear them. This FXS card is in a 2801 that is being used as our firewall and has a VPN tunnel back to our corporate office. The FXS card is registering with an IP address of the tunnel. Could this be causing our issue?

Thanks,

Jack

1 REPLY
New Member

Re: One way voice on FXS Card

If you are using MGCP as the protocol try these commands on the router

mgcp bind control source-address serial 0/0

mgcp bind media source-address serial 0/0

no mgcp

mgcp

Also try this link if this doesnot work out

http://cisco.com/en/US/tech/tk652/tk698/technologies_tech_note09186a008009484b.shtml

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