SIP phone as station

Description

The original AlphaCom SIP phone integration is based on SIP-phones related to AlphaCom connected as external Trunk lines. <br\> This implies no individual configuration for each SIP-phone or access to many of the useful AlphaCom features. <br\> For achieving extended functionality the SIP-phones are integrated as AlphaCom stations. <br\> Integrated SIP-phones have functionality equal to an ATLB telephone. <br\> SIP-phones are related to "physical" numbers in the same manner as IP stations. <br\> Each SIP-phone requires a "SIP station" license as in the original SIP phone integration. <br\>

Restrictions

SIP stations configured in the AlphaCom user table has all the same features and settings available as Stentofon stations. <br\> However because of the limitations of the SIP phones and protocol some features are not supported.

Functions Not Supported

Group Calls to SIP stations
Program distribution to SIP stations
Member of a Simplex Conference
Use functional open/private mode (7886/7887)
Volume setting
Extended line test (Tone test)

Configuration

Configuration of the SIP Station in AlphaPro

From the Users & Stations window in AlphaPro, select a user and ebnable the 'SIP station' flag
Configure Directory number and Display text
Select a supported codec for the SIP station to use

Note: AlphaPro 10.56 or higher is required

Configuration of the SIP station

SIP phones have various local set-up and configuration options, <br\> the level of integration will depend on the configuration available on the current phone model.

Best Integration Level <br\>

SIP phones with automatic dialing when "off hook" and SIP INFO digit signaling.

When lifting handset the SIP-phone will do an automatic set-up of a call. AlphaCom will give dial tone and interpreter the digits dialed "live" giving immediate response, ASVP messages and event trigging of station in use etc. This will give same functionality as dialing digits from an ATLB-telephone. SIP-clients configurable with auto-loud-speaking for incoming call can also support the standard Intercom functionality "OPEN" mode when receiving call. <br\> Medium Integration Level <br\>

SIP phones with SIP INFO signaling but without automatic dialing when "off hook"

When starting a feature (make a call) digits must be collected in the SIP phone before sent to the AlphaCom for interpretation. This will not give any feedback to the user before the collected digits is sent to the AlphaCom in the “INVITE” message. (Usually trigged by pressing the handset button, timeout or a dedicated “send” key.). <br\> Further dialing after activation of a feature like Inquiry or programming of wake up will be supported by SIP INFO signaling. Event-handler events can not be activated before the SIP client sends the information. (Station in use etc. will not be trigged when the user starts to dial locally) <br\> Basic Integration Level <br\>

SIP phones without SIP INFO signaling.

Activation of features will be supported in the same manner as Medium Integration level, but the SIPD only support digits during conversation sent as SIP INFO signalling. Stations without this type of signalling will not be able to do any feature activation during conversation or use features requiring extra parameters. X-lite is an example of a SIP client not supporting SIP INFO signalling. In conversation functions like inquiry, transfer and search will not work. Features requiring extra parameters like WakeUp and Follow Me will not work.

Configure the SIP phone with the following parameters

Basic level must be programmed for all SIP stations.
Medium and Best level can only be programmed if supported in the SIP station.

Basic Integration

The IP address of AlphaCom
Directory number matching directory number as configured in AlphaPro
Codec matching the codec as configured in AlphaPro

Medium Integration

Digit signalling with SIP INFO signalling. 
DTMF signalling in Audio band must be turned off if SIP trunks are to be used.

Best Intergration

Configure the "auto off hook dialling" sequence with the text: HOOK <br\>

Line Down Reporting

Line down reporting on SIP phones from AlphaCom is based on the "Registration expire" time out. This time out is default several hours on most SIP phones. If faster fault reporting is needed the time out must be adjusted.

The timeout can also be adjusted as a general parameter in AlphaCom NVRAM:

ex_profile.timeouts.sip_max_expire

0 = Use time out as defined in the SIP phones <br\> 0< = Time out in seconds

Configuration of Hotline Call

Hotline call is only available from SIP stations with best level of integration with option for "off hook auto dialling". <br\> When this is configured the SIP phone will get the AlphaCom dial tone when lifting the handset and the hotline timer is started.