33
Chapter 5
Telephony
Initiation Protocol) and RTP (Real-time Transport Protocol) respectively. If you are
unsure, please always keep the default value.
DTMF Relay Setting:
DTMF is Dual Tone Multi Frequency. Options available are SIP-Info,
RFC2833, and In-band. If you are unsure which one to choose, please always keep the
default value.
•
SIP INFO:
If it is selected, the modem router will capture the DTMF tone and transfer it
into SIP form. Then it will be sent to the remote end with SIP message.
•
RFC2833:
If it is selected, the modem router will capture the keypad number you
pressed and transfer it into digital form then send to the other side; the receiver will
generate the tone according to the digital form it receives. This function is very useful
when the network traffic congestion occurs and it still can remain the accuracy of
DTMF tone.
•
In-band:
If it is selected, the modem router will send the DTMF tone as audio directly
when you press the keypad on the phone.
Registry Expiration Time:
Expiration time for the registration message sending.
Registration Retry Interval:
Set the time duration for your SIP Registrar server to keep
your registration record. Before the time expires, the Modem Router will send another
register request to SIP Registrar again. If you are unsure of it, please always keep the
default value.
“No answer“ Time
: Set a time period, after which the caller is told that the call is not
answered and he or she can leave a message if the voice mail function is enabled.
T 38 support:
Select the checkbox to enable this function. T 38 specifies a protocol for
transmitting a fax across IP network in real time. It allows the transfer of fax documents
in real-time between two standard Group 3 facsimile terminals over the Internet or
other networks using IP protocols. It will only function when both sites support this
feature and are enabled.
End With ’#’:
Choose whether to use “#” as the end signal of your dialing or not.
When the
Status
column change to , your telephone information is successfully
registered. At this time, you can pick up your phone, dial the number, and call via
Internet!
5 4 Telephone Book
You can store all contacts on your modem router, have a telephone book, set speed dial
number for some contacts and enable warmline functions.
5 4 1 Telephone Book
Follow the steps below to have a telephone book on the modem router.
