[SIPForum-discussion] sip uri format with the +sign

[Manpreet Singh]

Nikos

 

With no +, there is not always a good indication where the format has
country code. The whole intention was to make interworking between ISUP
and SIP clear from NOA perspective. Unless discussed on the
international interconnection, + or no + confirms if the numbers
contains country code or not. All international interconnections require
a + beyond the national domain otherwise they are treated as National.

 

Thanks  

 

________________________________

From: Nikos Leontsinis [mailto:leontsinis at gmail.com] 
Sent: Wednesday, January 04, 2012 2:47 PM
To: Manpreet Singh
Cc: discussion at sipforum.org
Subject: Re: [SIPForum-discussion] sip uri format with the +sign

 

Hello Manpreet,

 

What about the case where there is no (+) and the number is in the
format (country code) (national code) which is 

the case for most if not all international voip what would the absence
of the + indicate?

 

AFAIK the nature of address is an old isup feature to faciliate routing
by  creating 2 routing tables inside the legacy switch. I fail to see
its relevance in the modern NGN switches.

 

 

/nikos

 

 

On 4 January 2012 20:03, Manpreet Singh <msingh at ibasis.net> wrote:

Nikos

 

This would be to put the Nature of address logic in the B number.  +
would be international NOA and without + could be national or unknown
and routing could be done differently. 

 

Thnx 

 

________________________________

From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of Nikos Leontsinis
Sent: Saturday, December 31, 2011 11:13 AM
Cc: discussion at sipforum.org
Subject: Re: [SIPForum-discussion] sip uri format with the +sign

 

I see that there are many carriers having adopted the sip uri with the +
in front

example:

sip:+1-212-555-1212:1234 at gateway.com
<mailto:sip%3A%2B1-212-555-1212%3A1234 at gateway.com> ;user=phone

This is not mandatory looking at the rfc 3261 is there any motivation
behind this decision?

 

/nikos





 

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Nikos Leontsinis
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