Version 7.2 579 Mediant 500L Gateway & E-SBC
User's Manual 27. Configuring Supplementary Services
• 'Call Forward Unconditional code' (SuppServCodeCFU)
• 'Call Forward Unconditional Deactivation' (SuppServCodeCFUDeact)
• 'Call Forward on Busy Code' (SuppServCodeCFB)
• 'Call Forward on Busy Deactivation' (SuppServCodeCFBDeact)
• 'Call Forward on No Reply Code' (SuppServCodeCFNR)
• 'Call Forward on No Reply Deactivation' (SuppServCodeCFNRDeact)
3. Click Apply.
Note: The call forward codes must be configured according to the settings of the
softswitch (i.e., the softswitch must recognize them).
Below is an example of an INVITE message sent by the device indicating an unconditional
call forward (“*72”) to extension number 100. The code is configured by the
SuppServCodeCFU parameter.
INVITE sip:*72100@10.33.8.53;user=phone SIP/2.0
Via: SIP/2.0/UDP 10.33.2.5:5060;branch=z9hG4bKWDSUKUHWFEXQSVOUVJGM
From: <sip:400@10.33.2.5;user=phone>;tag=DUOROSXSOYJJLNBFRQTG
To: <sip:*72100@10.33.8.53;user=phone>
Call-ID: GMNOVQRRXUUCYCQSFAHS@10.33.2.5
CSeq: 1 INVITE
Contact: <sip:400@10.33.2.5:5060>
Supported: em,100rel,timer,replaces
Allow:
REGISTER,OPTIONS,INVITE,ACK,CANCEL,BYE,NOTIFY,PRACK,REFER,INFO,SUB
SCRIBE
User-Agent: Sip Message Generator V1.0.0.5
User-to-User: 31323334;pd=4
Content-Type: application/sdp
Content-Length: 155
27.6.6 Local Handling of BRI Call Forwarding
You can configure the device to handle BRI call forwarding per BRI extension line, using
the Supplementary Services table.
Upon receipt of an ISDN Facility message from the BRI phone user, the device retrieves
and stores the user's call forwarding information. This includes whether the user has
activated or de-actived call forwarding as well as the type of call forwarding service (Call
Forward Busy, Call Forward No Reply, and Call Forward Unconditional). When the device
receives a call (INVITE message) for a user whose phone number is configured in the
'Local Phone Number' field of the Supplementary Services table and call forwarding has
been activated by the user, the device replies to the calling party with a SIP 302 (Moved
Temporarily) response containing the configured call forwarding number corresponding to
the call forwarding type. The call forwarding type and original called number (user's phone
number) is sent in the SIP Diversion header, for example:
Diversion: <sip:401>;reason=unconditional;counter=1
The call forwarding number is sent in the SIP Contact header, for example:
Contact: sip:567@10.33.77.17;user=phone
When call forwarding is activated and the user off-hooks the phone, the device plays the
stutter dial tone (Tone Type #15) as a reminder to the user that call forwarding is activated.
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