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Beginner

Hair pinning

Is it possible to configure a hair pinning config where two IP phones try to call each other via the same Gateway without configuring a POTS dial peer? What are the relevant configs for MGCP / H.323 / SIP Gateways?

Any help would be appreciated.

RS.

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What is throwing me off here is that the tendency is to assume that IP phones are leveraging a call procesing agent of some sort. A host that is responsible for call control. We are typically used to a client/server model when it comes to IP phone signaling. We assume phones are dumn, IOW.

So, with that in mind, Java was mentioning CME because it is a feature that can be loaded on a gateway to allow IP phones to register and communication. CME is basically a PBX (or key system if you must) and a SIP registrar/proxy. CME stands for Communications Manager Express. It is a licensed feature (i.e. pay for it).

You asked about SIP phones. So, CME with SIP configs can be found on CCO. One example:

http://www.cisco.com/en/US/products/sw/voicesw/ps4625/products_configuration_example09186a00808f33eb.shtml

Now, if your phones can operate in a peer-to-peer mode then you I suppose you can use a cisco gateway to route calls using voip dial-peers. You would need to have the ability to route IP-to-IP calls. This is also a licensed feature set. Search for Cisco Unified Border Element (CUBE).

HTH.

-Bill (@ucguerrilla)

HTH -Bill (b) http://ucguerrilla.com (t) @ucguerrilla

Please remember to rate helpful responses and identify

View solution in original post

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Hall of Fame Cisco Employee

So, are you asking how to get two phones in the same GW to call each other and not hairpinn??

First of all, if all you got is a GW, then MGCP is not an option.

You can use CME, review the online documentation on it.

HTH

java

if this helps, please rate

www.cisco.com/go/pdihelpdesk

HTH

java

if this helps, please rate
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Hi Jamie,

Basically I want 2 phones in the same GW to call eack other. Is there any way to do it via H.323 / SIP, if so are there any sample configs?

Thanks,

RS...

Highlighted

What is throwing me off here is that the tendency is to assume that IP phones are leveraging a call procesing agent of some sort. A host that is responsible for call control. We are typically used to a client/server model when it comes to IP phone signaling. We assume phones are dumn, IOW.

So, with that in mind, Java was mentioning CME because it is a feature that can be loaded on a gateway to allow IP phones to register and communication. CME is basically a PBX (or key system if you must) and a SIP registrar/proxy. CME stands for Communications Manager Express. It is a licensed feature (i.e. pay for it).

You asked about SIP phones. So, CME with SIP configs can be found on CCO. One example:

http://www.cisco.com/en/US/products/sw/voicesw/ps4625/products_configuration_example09186a00808f33eb.shtml

Now, if your phones can operate in a peer-to-peer mode then you I suppose you can use a cisco gateway to route calls using voip dial-peers. You would need to have the ability to route IP-to-IP calls. This is also a licensed feature set. Search for Cisco Unified Border Element (CUBE).

HTH.

-Bill (@ucguerrilla)

HTH -Bill (b) http://ucguerrilla.com (t) @ucguerrilla

Please remember to rate helpful responses and identify

View solution in original post

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