•Common usages of Alert-Info for common PBX
ring tones are not
interoperable, e.g.
–Alert-Info:
<file://ring.pcm>;alert=internal
–Alert-Info:
<file://intermal.ring.pcm>
–Alert-Info:
<sip:internal-ringtone@example.com>
–
•draft-ietf-bliss-shared-appearances needs to
specify a default ringtone
when using appearance Alert-Info parameter.