[SIPForum-discussion] without registering a IP phone , Can we make a call?

Thomas Trung trungdo at patton.com
Wed Oct 10 14:50:19 UTC 2012

Hi Michael,

The answer is no if you are using IP PHOne.

Yes, if you are using VOIP Gateway. Some of kind VoIP gateway can be support
sip peer-to-peer like sip trunking so you can make the call from the phone
connected to the first voip gateway to the another phone connected to the
second voip gateway.


Thomas Trung

From:  Michael Scofield <amit.chhikara at hotmail.com>
Date:  Tuesday, October 9, 2012 12:29 AM
To:  "discussion at sipforum.org" <discussion at sipforum.org>
Subject:  [SIPForum-discussion] without registering a IP phone , Can we make
a call?

Hi All,

one scenerio:

if one phone is registered to registrar server, 2nd phone is not registered
but 1st phone knows the IP address of 2nd IP Phone
 in that case we can make call between 2 IP Phones or not??

Please tell me if i am not clear.

Thanks in Advance.

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