13-4940-00251 Commend SIP Doorphone
4
Device Limitations
This is a list of problems or not supported features when the Commend SIP Doorphone is
connected to the Mitel 3300 ICP.
Feature Problem Description
De-registration
Not supported. The Commend SIP Doorphone has no means on the
client to de-register.
Recommendation: Contact your local Commend reseller for further
details
All Call Features
The Commend SIP Doorphone has only a single call button to initiate
outbound calls to a pre-provisioned DN, and therefore cannot support
call features.
Recommendation: Contact your local Commend reseller for further
details
DTMF
For In-Band DTMF on SIP to SIP calls, you could hear the played
tones on the Commend SIP Doorphone, but the tones would not
activate the door relay.
use RFC2833
Codec Support
The Commend 8028 does not support G729
Recommendation: Use G711 or G722 codec.
Resiliency
Not supported – The Commend Doorphone does not switch to
secondary MCD when the primary MCD is not available.
Recommendation: Contact your local Commend reseller for further
details
Miscellaneous
The Commend SIP Doorphone dos not support non-preferred
Provisionial Response (PRACK or no PRACK) and did not maintain
long calls through Session Timer resets (neither UPDATE nor re-
INVITE).
Recommendation: Contact your local Commend reseller for further
details
