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

[Raees Shaikh]

Hi All,

The phone just ignores the sip invite received from an unknown source.

Regards
Raees
On Nov 16, 2012 2:58 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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