TANDBERG D13841.01 - Manual (Page 20)

TANDBERG 3G Gateway User Manual
20
3.2 Dial from UMTS
The gateway supports tree different UMTS Dial In services:
-
“
DiD
” 
Direct outwards dialing of a 3G handset.
-
“
IVR
” 
Dialing 3G terminals via selection menu.
-
“
Phonebook
” 
Selecting entry from gateway phonebook
Any of these services can be enabled or disabled, but at least one must be enabled for incoming
call routing to take place.
In order to enable parallel incoming calls, a PRI number range must be defined.
For more details on UMTS Dial In services, please see the section
‘
5.7 Services
’
.
DID
Direct Inward Dialing (DID) will provide you with direct ISDN numbers for your IP endpoints i.e. it
will do a direct mapping between your ISDN number and the H.323 Alias or vice versa. In order to
use DID you will need to have assigned multiple ISDN numbers to your ISDN PRI or BRI line, as
each ISDN number will map to a single IP endpoint.
Example:

Your ISDN number range is from 67124000 to 67124050 and DID is enabled.

You want your IP endpoints to have the numbers (H.323 Alias) in the range 94000 -
94050.
In the services Configuration, set (remove) Prefix/Nr to 67124, set Service Type to
DiD and (add) Prefix/Nr to 9.

To call an IP endpoint with H.323 Alias 94020 from ISDN, dial the ISDN number
67124020.

The gateway starts to call the IP endpoint and the
“
connecting
”
picture and sound are
activated.

When the call is connected audio and video are transmitted through the gateway.
IVR
Interactive Voice Response (IVR), also called extension dial-in, is an automated answering
system that directs the call to the IP endpoint indicated by the caller. The caller uses telephone
tones (DTMF) to enter the H.323 Alias or extension.
IVR is useful if you have limited numbers on your ISDN PRI or BRI line.