System information

CHAPTER 4. TRUNK OPTIONS AND REQUIREMENTS 4-3
Ordering caller identification
Inbound caller identification
Caller ID or Automatic Number Identification (ANI) is used by TeleVantage as a means of
identifying incoming calls. Many useful TeleVantage features rely on caller identification.
Customized greetings, customized routing lists, and call rules for individuals all use caller
identification.
It is highly recommended that you order a caller identification service for all of your trunk lines.
Q For analog trunks, order Caller ID.
Q For T1, E1, ISDN BRI, or analog DID trunks, order ANI.
Outbound caller identification
TeleVantage allows you to specify custom outbound Caller ID information on ISDN trunks.
Not all ISDN providers support custom numbers as outbound Caller ID—some restrict you to
using only registered numbers for your trunks, and some do not allow you to set custom Caller
ID at all. If you want to specify custom numbers as outbound caller ID on your ISDN trunks,
ask your ISDN provider if they support custom calling party numbers, sometimes referred to as
custom Caller ID or customer-defined Caller ID.
For more about configuring outbound Caller ID, see Administering TeleVantage.
Ordering Direct Inward Dial
When you order DID, your site is given a block of sequential telephone numbers. You then
assign these numbers to individual phones within TeleVantage. In this way callers can dial users
assigned to those phones directly, without having to go through an auto attendant or operator.
DID generally transmits the last three or four digits of the phone number dialed. TeleVantage
recognizes the DID digits and routes the call to the appropriate user or auto attendant. DID
enables you to set up private phone numbers for users without having to dedicate trunks.
Another service, Dialed Number Identification Service (DNIS) works in the same way as DID,
but is used for toll-free lines such as 800, 877, and 888 numbers. In TeleVantage, DID refers to
both DID and DNIS.
To use DID, you must configure your TeleVantage trunks to recognize it. For instructions, see
Administering TeleVantage.