[VoiceOps] SPID parameter in LNP redirects

Alex Balashov abalashov at evaristesys.com
Fri Sep 20 14:26:05 EDT 2013

Hi all,

A question for you: do LNP-over-SIP providers--the kinds that return RFC 
4694-encoded SIP redirects with the LRN in the 'rn' parameter in the 
user part of the Contact URI--commonly return the SPID/OCN as well?

One major provider we know does;  they return a 'spid' on all numbers, 
regardless of whether 'rn' does.  However, others don't return any 
operator-identifying information at all apart from the LRN.

Does anyone have a sense, anecdotally, of how common it is to give back 


Alex Balashov - Principal
Evariste Systems LLC
235 E Ponce de Leon Ave
Suite 106
Decatur, GA 30030
United States
Tel: +1-678-954-0670
Web: http://www.evaristesys.com/, http://www.alexbalashov.com/

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