In the context of the argument Hadriel is putting forward, he is correct. IMS deployments exist, but you can still regard what is out there as essentially IMS islands connected by the PSTN.
For example, I suspect any Skype call you make to an IMS user is via the PSTN. And standards for direct interconnection of the enterprise SIP networks to IMS are relatively new, and we are still working on the bells and whistles. I would also note that some of the biggest users of mobiles for both voice and messaging are under 18, and they don't have Blackberrys, and the messaging they use is SMS over the CS network (i.e. PSTN), not over IP, at least in the 3GPP side of the house. Regards Keith > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of Henry Sinnreich > Sent: Friday, June 27, 2008 8:54 PM > To: Hadriel Kaplan; Hannes Tschofenig; Elwell, John > Cc: [email protected]; Paul Kyzivat; Dan Wing > Subject: Re: [Sip] Toward the Evolution of SIP and Related > Working Groups > > > See above - cell phones *are* the PSTN, at least so far they are. > > Any IMS folks here to agree with this? :-) > > Henry > > > On 6/27/08 12:31 PM, "Hadriel Kaplan" <[EMAIL PROTECTED]> wrote: > > > > > > >> -----Original Message----- > >> From: Henry Sinnreich [mailto:[EMAIL PROTECTED] > >> Sent: Friday, June 27, 2008 3:11 PM > >> To: Hadriel Kaplan; Hannes Tschofenig; Elwell, John > >> Cc: [email protected]; Paul Kyzivat; Dan Wing > >> Subject: Re: [Sip] Toward the Evolution of SIP and Related Working > >> Groups > >> > >>> 1) Because most of their calls still go to/from the PSTN. > >> > >> I wonder if this may still be true: > >> - All employees have cell phones > > > > All cell phones *are* on the PSTN, for all intents and purposes to > > which the email was about. > > > >>> 3) Because voice means business/money for many Enterprises > >> > >> I wonder about this too. Except for the marketing and > support folks, > >> talking > > > > And sales, and brick-and-mortar retailers, and food delivery, and > > repair shops, and hotels, and restaurants, and financial trading > > floors, and most things found in thick yellow books or on business > > cards. I'm not saying commerce doesn't happen in other ways (duh), > > just that it also happens over voice. I have no idea if it's > > more/less than email or http or whatever (and I bet the > answer to that is regionally-specific), just that it's darn big. > > > > > >> Using voice at work (at some cost to the enterprise) seems > to me just > >> a bad habit or bad legacy, and is rather the exception, > not the rule. > >> > >> BTW: Don't you have a plain cell phone, iPhone or Blackberry? > > > > See above - cell phones *are* the PSTN, at least so far they are. > > > > -hadriel > > _______________________________________________ > Sip mailing list https://www.ietf.org/mailman/listinfo/sip > This list is for NEW development of the core SIP Protocol Use > [EMAIL PROTECTED] for questions on current sip > Use [EMAIL PROTECTED] for new developments on the application of sip > _______________________________________________ Sip mailing list https://www.ietf.org/mailman/listinfo/sip This list is for NEW development of the core SIP Protocol Use [EMAIL PROTECTED] for questions on current sip Use [EMAIL PROTECTED] for new developments on the application of sip
