P-Preferred Identity Header For Bla Accounts - Mitel 6867i Administrator's Manual

sip line1 mode: 3
sip line1 user name:4085582868
sip line1 display name: Alice
sip line1 screen name: Alice

P-PREFERRED IDENTITY HEADER FOR BLA ACCOUNTS

The IP Phones support the BLA specification, draft-anil-sipping-bla-02, which states that the
P-Preferrred-Identity header (RFC3325) gets added to the INVITE message to indicate the
Caller-ID that is used for the call.
Note: The P-Preferred-Identity for BLA accounts is also sent for hold/unhold messages.
BLA SUPPORT FOR MESSAGE WAITING INDICATOR (MWI)
The IP Phones have an option for a Busy Line Appearance (BLA) configured line to send a
SUBSCRIBE SIP message for a Message Waiting Indicator (MWI).
Notes:
1. If you change the setting on this parameter, you must reboot the phone for it to take
affect.
2. Both the "sip explicit mwi subscription" and "sip mwi for bla account" parameters
must be enabled in order for the MWI subscription for BLA to occur.
3. The MWI re-subscription for the BLA account uses the value set for the "sip explicit
mwi subscription period" parameter to re-subscribe.
4.Whether or not the "sip mwi for bla account" parameter is enabled, the priority
for displaying MWI does not change.
You can configure this feature using the configuration files or the Mitel Web UI.
Limitations
The following are limitations of the BLA Support for MWI feature:
• The phone shows MWI for the first matching identity if more than one line with different
user names has the same BLA account.
• If a normal line has the same user name as the BLA user of another line, the phone shows
MWI only for the normal line.
Operational Features
5-208