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 Teams/Skype clients. The Ribbon SBC 1000/2000 system will send calls to a Teams/Skype client with ext and phone-context configured properly, and when received, the Teams/Skype client will appropriately set the calling number based on the phone-context value:
Call Route Table
We create a call routing table with the following 3 call routing entries in it. Two of the entries point to Transformation tables for calls that originate from SIP and PSTN devices to a Teams/Skype client, and the third call routing entry points to a Transformation table for a call that originates from a Teams/Skype client to a PSTN device:
Row | Transformation Table | Destination Type | Signaling Group | Media Selection | Media Transcoding | Call Control Profile | Fork |
|---|---|---|---|---|---|---|---|
1 | normal | registra | G.711 | Enabled | None | No | |
2 | normal | ISDN | G.711 | Enabled | None | No | |
3 | normal | Teams/Skype | G.711 | Enabled | None | No |
Click each Transformation table link above to view its summarized behavior.
Transformation Tables
Local SIP Phone to Teams/Skype
Summarized transformation behavior:
- 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 Teams/Skype client. Ribbon 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 |
| Called Extension |
| Mandatory |
2 | Calling Address/Number |
| Calling Extension |
| Mandatory |
3 | Calling Address/Number |
| Calling Phone Context |
| Mandatory |
Mmessage Flow:
Local SIP Phone to Teams/Skype
PSTN to Teams/Skype
Summarized transformation behavior:
- Calls with Called Number of 14085551000 will be sent to Teams/Skype with phone-context set to san_jose.example.com
- Calls with Called Number of 14155553000 will be sent to Teams/Skype with phone-context set to san_francisco.example.com
Row | Input Field | Match Field/ Field Value | Output Field/ Replaced by Field | Field Value | Match Type |
|---|---|---|---|---|---|
1 | Called Address/Number |
| Calling phone context |
| Optional |
2 | Called Address/Number |
| Calling phone context |
| Optional |
Message Flow:
PSTN to Teams/Skype
Teams/Skype to PSTN
Summarized transformation behavior:
- Calls with Called Number of 1 plus ten digits and phone-context of san_jose.example.com will be sent to the PSTN with Calling Number set to 14085551000
- Calls with Called Number of 1 plus ten digits and phone-context of san_francisco.example.com will be sent to the PSTN with Calling Number set to 14155553000
Row | Input Field | Match Field/ Field Value | Output Field/ Replaced by Field | Field Value | Match Type |
|---|---|---|---|---|---|
1 | Called Address/Number |
| Called Extension |
| Mandatory |
2 | Calling phone context |
| Calling Address/Number |
| Optional |
3 | Calling phone context |
| Calling Address/Number |
| Optional |
Message Flow:
Teams/Skype to PSTN
Note: SIP message sent by the Ribbon SBC 1000/2000 system should have the From and To headers as follows:
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>
Overview
Content Tools