Heavy Reading analyst Sterling Perrin wrote in September last year that Verizon had "done an excellent job defining the requirements for these new core packet-optical elements." (See Packet Optical Transport Goes for the Long Haul.)
AT&T is among the carriers that have backed the One Voice initiative, which is working on an IMS-based approach to solving the voice-over-LTE issue. (See Operators Rally Round IMS for LTE Voice.)
The carrier has issued a request for information (RFI) to the relevant vendors, believes Trebnick, so the potential VoIP architecture refresh is still in its very early stages.
The main vendors in the loop here include AlcaLu, Genband Inc. (which is hoping to buy Nortel's VoIP assets), Nokia Networks , and, of course, AT&T's incumbent supplier Sonus Networks Inc. (Nasdaq: SONS). (See Genband Bids $282M for Nortel's VoIP Unit and Nortel VoIP Auction Set for Late Feb.)
— Ray Le Maistre, International Managing Editor, Light Reading