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

[Rajib Deka]

It might be possible if the IP phone allows you to manually enter the URI
of the end point you are dialing. I have an experience of doing this with a
soft IP phone, unfortunately I forgot the name of the phone. Most of the
proxies have settings to enable guest calls.
-Rajib
On Mon, Nov 26, 2012 at 1:26 PM, Srinivas Rao <dadisrao at gmail.com> wrote:

> if you have a static ip you can make a call with out any sip server
>
> regards
> dsrao
>
>
> On Tue, Nov 13, 2012 at 10:09 AM, Rudra Kant Kanth <rudra.k1 at gmail.com>wrote:
>
>> Hi Thomas, Mike...
>>
>> For any phone (in our case, SIP phone) to speak out to an IP phone, this
>> phone has to be registered somewhere. I am not 100% clear in drawing the
>> picture what would happen if a VoIP gateway in placed in b/w. The job of
>> Voice Gateway would be to provide some initial greetings or routing the
>> call to an IP (which is our IP phone here, the IP of whose we know
>> already); but; if someone wants to speak with the user on this phone, then,
>> I understand that the phone has to be registered to something. This can be
>> any gatekeeper, but, there has to be a gatekeeper which can pass the
>> signalling onto this phone for the phone to ring and eventually answer.
>> For any two phones across anywhere to speak with each other (be it a SIP
>> or an IP phone), these phones must be registered.. Let me know if I am
>> incorrect...
>>
>> Regards,
>> Rudra
>>
>>
>> On Wed, Oct 10, 2012 at 8:20 PM, Thomas Trung <trungdo at patton.com> wrote:
>>
>>>  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.
>>>
>>> Regarding
>>>
>>> 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.
>>>
>>>
>>> Regards,
>>> Michael
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>
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-- 
Rajib Deka
Software Engineer
Servion Global Solution
Chennai, India

Mobile No: + 91 91767 80669
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