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SIP Operation Manual
6. Coding Principle
Instruction
Dial the phone number which you want to call and press # to call out immediately, or wait
until the “Inter DTMF Timeout” expires (defined in
Advanced Options\Inter Digits
Timeout
, default=4 seconds).
If the phone number fits the setting of the Digit Map, the gateway dials out the phone
number through the assigned interface automatically.
The phone number should have at least 2 digits (not including * and #).
Dialed Number Processing Flow
To maintain maximum flexibility, the number dialed will be looked up in several tables defined by
the gateway. If no match is found, it will look up the number form the registered Proxy Server. The
number look up flow is shown below:
Example for Call Out via VoIP – Contents of Invite
The phone book settings:
When dialing 88 or transferred to 88 with Digit Map, the gateway sends
INVITE sip:[email protected]:5060
When dialing 88123456 or transferred to 88123456 with Digit Map, the gateway sends
INVITE sip:[email protected]:5060
Digit Map
Table
Extension
Number
Phone
Book
Phone Book
Manager
SIP
Proxy
