MITEL 6900, 6970, 6800, AND 6700 SIP TERMINALS FOR MIVOICE MX-ONE
53 26/1531-ANF 901 14 Uen S 2019-10-18
11.28.1 LIMITATIONS
When the phone loses contact with the primary SIP registrar, it can take up to 10
minutes (refresh of the registration time) before the telephone registers towards the
backup registrar.
Mitel 6900/6800/6700 terminals, deployed with Log On/Off xml key, cannot use the key
when the primary proxy/registrar is not responding. As a workaround it is possible to
log on with the free seating procedure (*11*PIN*extension number#).
If the terminal is registered towards the backup registrar and if the user logs off with the
#11# procedure, the IP address to the primary SIP proxy is lost and it is only possible
to log on towards the backup SIP proxy. To go back to primary SIP proxy, the local
configuration settings have to be removed in the phone, see 9.2 Remove local config-
uration settings on page 19.
When the telephone is registered towards the backup registrar and when the user initi-
ates a call, the INVITE will be sent to the primary proxy first and then to the backup
proxy, which causes a delay of the call with 3-4 seconds.
11.29 REGISTRATION AT BRANCH OFFICES
The branch office scenario means that the telephones are registered to to PBX in the
main office and if the connection to the main office fails, the phones shall register to a
local SIP server.
When the connection to the main office is working again, the telephones shall register
towards this PBX again.
The way to configure this is to use sip backup proxy ip and sip backup registrar ip in
the aastra.cfg/startup.cfg file, see section 11.28 Redundancy on page 52 or see
11.22 Using DNS SRV Resource Records on page 49.
11.30 VOICE MAIL
When a user has got a voice mail and the message waiting key is flashing, the user can
listen to his voice mail by pressing this key. The telephone will send the *32# procedure
to the system.
If there is no message waiting, it can still be useful to call the voice mail system. This
is done by pressing the Services key and select VoiceMail. In this case the phone will
use the directory number to access the voice mail system.
The settings for these options are defined in the aastra.cfg/startup.cfg file. Below is an
example:
sip vmail:”*32#”
sip line1 vmail:”*32#”
sip explicit mwi subscription: 1
services script: http://$$PROXYURL$$:22222/services?user=$$SIPUSER-
NAME$$ voicemailnr=12345
11.31 CORPORATE DIRECTORY
From the phone it is possible to search in a corporate directory via the XML interface
described in XML API for Mitel SIP phones.
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