[Ecrit] URN: for people with hearing loss

[Henning Schulzrinne <[e-mail]>]

Several countries have separate numbers (some short, some toll-free) where
people can send an SMS or fax for emergency assistance. (The US has made
the decision to use 911 for SMS as well, but that's not relevant for this
discussion. In those countries, such calls need to be routed separately and
you can't tell whether you are going to send a fax when dialing...)

One possibility is to use *sos.text *(with the understanding that this
includes fax; none of the countries I checked separate those), but I'm not
terribly happy with this label.

I want to avoid something like *sos.hearing-loss* since this assumes that
only people with hearing loss can use the service. Some countries do
require some kind of registration, but this does not seem like something we
want to encode in a URN.

Henning