Mark R. Lindsey writes: > It is much more reasonable to expect the service-provider/enterprise > to implement the location conveyance. They'd add the location in > their proxies/B2BUAs/ALGs. For example, an enterprise building ALG > could add its location before sending the call to an SP.
enterprises (at least smaller ones) don't run their own proxies. they buy the service hosted and the service provider has no idea where the individual phones are. especially now when, for example, nokia enterprise phones allow you to make calls over 3G or WLANs everywhere. > In addition, it's the service provider that will likely perform SIP > peering with a PSAP. In the US, that's the typical model in already. > Service providers sometimes already know where their users are. Yes, > yes, I know this isn't the main point of location-conveyance. in finland, sweden, and some other european contries the standard for emergency calls is to prefix emergency number with community code of the caller. proxy can do that IF caller always keeps his/her current community code up to date, which is a big IF. there is thus no need for this location conveyance draft. > But besides all of this: we've got to get the PSAPs capable of > reliably using the location provided in the call. The capability to > send the location will be far simpler than actually having a PSAP > that can accept and use it. so you have big problem at both ends. not very motivating for implementers. -- juha _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
