Mitel Deutschland GmbH 68635RFP36U-01 User Manual
SIP-DECT OM System Manual
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The following states are not supported:
•
Handset battery state (HBS)
always “Unknown”
•
Software Status (SWS)
always set to “Warning” to indicate the limited feature set
•
Silent charging state (SCS)
always “Unknown”
GAP DECT phones do not support the active monitoring (Handset activity status /HCS). In general, there
is no guarantee for the correct interworking of the 3
is no guarantee for the correct interworking of the 3
rd
party DECT phone with SIP-DECT.
7.29.10 RESTRICTIONS
The described mechanisms check the status information in the OMM. Therefore the solution has certain
limitations.
limitations.
The OMM determines the availability of the DECT device which does not necessarily represents the
availability of the user.
availability of the user.
•
It is not possible to determine whether a user actually carries his device with or not.
•
The check of the availability does not include the infrastructure to which the OMM is connected (e.g.
call manager, etc.). A user appears as available even if the call manager fails.
•
Feature (especially call diversion) when managed by the call server can undermine the monitoring.
•
If a user is removed from the OMM, the monitoring stops without escalation. It cannot be checked if
the user belongs to an alarm scenario configured in the alarm server or any other application
scenario.
scenario.
7.30 SRTP
Together with the new RFP 35/36/37 IP and 43 WLAN, SIP-DECT supports SRTP to encrypt the RTP
voice streams and SDES for the SRTP key exchange.
voice streams and SDES for the SRTP key exchange.
There are three options for SRTP:
•
SRTP only: only SRTP calls will be accepted, all other will be rejected (the audio part of the SDP
contains RTP/SAVP)
•
SRTP preferred: all calls will be initiated as secured, but accepted if they are not secured (the
audio part of the SDP contain RTP/AVP)
•
SRTP disabled: only RTP calls will be initiated as not ciphered and incoming ciphering algorithm
will be not accepted. All communications are established unencrypted.
SIP-DECT provides the cipher suite AES_CM_128_HMAC_SHA1_80.
SRTP calls from DECT phones with DECT handover require that the SRTP functionality must be
homogenously available on all effected RFPs. To allow mixed installations with the older RFP types
32/34 and 42 WLAN, the SRTP feature can be enabled or disabled per site. Whereby, SRTP can only be
activated on sites with only RFPs 35/36/37/43 included.
homogenously available on all effected RFPs. To allow mixed installations with the older RFP types
32/34 and 42 WLAN, the SRTP feature can be enabled or disabled per site. Whereby, SRTP can only be
activated on sites with only RFPs 35/36/37/43 included.