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This page contains a simple example to demonstrate the manipulation of the ext= and phone-context= tags of the SIP URI for calls to and from Lync clients. The Sonus

Spacevars
0company
SBC 1000/2000 system will send calls to a Lync client with ext and phone-context configured properly, and when received, the Lync client will appropriately set the calling number based on the phone-context value:

...

  • All Called Number of 4-digit whose number does not begin with '2' and Calling Number of 4-digit beginning with '2' will be sent to the Lync client. Sonus
    Spacevars
    0company
    SBC 1000/2000 will set phone-context to fremont.example.com and ext to the Calling Number.

Row

Input Field

Match Field/ Field Value

Output Field/ Replaced by Field

Field Value

Match Type

1

Called Address/Number

([^2]\d{3}$)

Called Extension

\1

Mandatory

2

Calling Address/Number

(2\d{3}$)

Calling Extension

\1

Mandatory

3

Calling Address/Number

(2\d{3}$)

Calling Phone Context

fremont.example.com

Mandatory

Mmessage Flow:

Panel
borderStylenone

Caption
0Figure
1Local SIP Phone

...

to Lync

Image Modified

 

PSTN to Lync

Summarized transformation behavior:

...

Row

Input Field

Match Field/ Field Value

Output Field/ Replaced by Field

Field Value

Match Type

1

Called Address/Number

14085551000

Calling phone context

san_jose.example.com

Optional

2

Called Address/Number

14155553000

Calling phone context

san_francisco.example.com

Optional

Mmessage Flow:

Panel
borderStylenone

Caption
0Figure
1PSTN

...

to Lync

Image Modified

 

Lync to PSTN

Summarized transformation behavior:

...

Row

Input Field

Match Field/ Field Value

Output Field/ Replaced by Field

Field Value

Match Type

1

Called Address/Number

(1\d{10}$)

Called Extension

\1

Mandatory

2

Calling phone context

san_jose.example.com

Calling Address/Number

14085551000

Optional

3

Calling phone context

san_francisco.example.com

Calling Address/Number

14155553000

Optional

Mmessage Flow:

Panel
borderStylenone

Caption
0Figure
1Lync

...

to PSTN

Image Modified

 

 

Note

Note: SIP message sent by the Sonus

Spacevars
0company
SBC 1000/2000 system should have the From and To headers as follows:

No Format
From: 5551234<sip:5551234;ext=1234;phone-context=example.com@192.168.1.10>
To: tel:2222<sip:2222;ext=2222;phone-context=example.com@192.168.1.20>