Here the administrator may define a list of phone extensions for his IP Centrex environment, plus create abbreviated dialing for external phone numbers. The Abbreviated Dialing feature works with both SIP and H.323, with adequate support from either the SIP Server or Cisco TCL IVR.
A PortaBilling® customer can set up dialing rules as an international prefix, outside prefix, direct number (e.g. 911), or abbreviated dialing for his accounts.
NOTE: To be able to add abbreviated numbers, first type the maximum number of digits that a short number must consist of into the Maximum Abbreviated Number Length field and click Save on the toolbar.
For example, if you save ‘3’ in the Maximum Abbreviated Number Length field, you will be able to use abbreviated numbers like 1, 2, 34, 145, 999, etc.
To add a new abbreviated dialing
number, click the 
Add
button and enter the following information:
| Field | Description |
|---|---|
Abbreviated # |
The number the end user will dial on his phone (extension number). |
# To Dial |
The number that the call will be forwarded to. You may enter the ID of one of the customer’s accounts or any phone number. If you leave this field blank, then the abbreviated number is considered to be a direct number, or “dial as is”. This is useful for making sure that special numbers (e.g. 112) are never converted by other translation rules. Note: Phone numbers must be entered in the E.164 format. |
Description |
Description of this abbreviated number, e.g. “Andrew’s IP phone”. |
SIP |
If #To Dial represents the ID of one of the customer’s accounts, you will see the SIP “lamp” icon here. It will light up if the account is currently being used by a SIP UA to register with the SIP server; otherwise it will be gray. |