Sip Protocol - DBL Technology HT-912T User Manual

option.
E) Registration Mode
Use to compatible different PBX, do not need to configure under normal
circumstances.
F) DTMF Signaling
By using DTMF, the telephone transfer phone-signal to call clearinghouse by audio
tape. That is to say, two different frequencies of sound are combined into 16 kind
of tone. Telecommunications or telecom service hotline like 1860 identifies these
special sounds by DSP, which use to certain the dial-number. DTMF has 2 styles:
Inband and Outband.
1) Inband DTMF
This style makes the special dial-tone together with talk-tone and transfer out
without any treatment. So Inband only has one way to set DTMF signaling.
2) Outband DTMF
This style uses special methods and transfers the dial-tone to certain the
correctness. The special methods are the called protocol, such as RFC2833.
G) QOS Signaling
is network quality of service and ability of higher priority service that
QOS
network supports, including dedicated broadband、 control and delay jitter、 packet
loss rate improvement and so on. This option can label for QOS which is
designated by call signaling packets, in order to improve the network quality of
service.

3.3.3.3. SIP Protocol

SIP (Session Initiation Protocol) is identified by IETF, use to create, change and
release the session of one or several participants. These sessions are like Internet
Multimedia Conference, IP phone or Multimedia Distribution. The session participants
could communicate by Multicast, Mesh Unicast, or mixture of the two.
If use SIP protocol, choose SIP Terminal, and enter SIP configuration page.