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CUCM to sip provider

Is it possible to directly connect a CUCM to a sip provider without the use of a gateway?

1 ACCEPTED SOLUTION

Accepted Solutions

Hi,yes, that's possible,

Hi,

yes, that's possible, although not recommended.

You should use at least a simple firewall. A better option would be to use CUBE.

G.

6 REPLIES

Hi,yes, that's possible,

Hi,

yes, that's possible, although not recommended.

You should use at least a simple firewall. A better option would be to use CUBE.

G.

New Member

If I do put a firewall in

If I do put a firewall in between will there be any issues with NAT

 

Hi,it depends (on the network

Hi,

it depends (on the network topology, among others).

I have seen a customer with a Linux box with a set of iptables rules functioning as a filter between the telco provider and a CUCM cluster.

G.

New Member

Is it possible to have

Is it possible to have multiple sip trunks connect to the CUCM to the sip provider 

SIP Does not work very well

SIP Does not work very well (if at all) through a NAT. If you want to NAT the SIP trunk, you really need a session border controller (e.g. CUBE) instead.

 

GTG

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Cisco Employee

Depending on what the telco

Depending on what the telco requires, it might not be feasible without a CUBE in between.

HTH

java

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