Denwa Communications DW-820 User Manual page 114

Sections
SIP Account
Codecs
DTMF
Call
Session Timer
Description
To display current Account settings or to select which account
to display.
To display and configure available/unavailable codecs list.
Codec means coder-decoder which is used to transfer analog
signal to digital signal or vice versa.
Familiar codecs are PCMU(G711U), PCMA(G711A), G722
(wid-bandth codecs),G729 and so on.
To display and configure DTMF settings.

Type: Support Inband, Info, RFC2833 or
their combination.

How To Notify DTMF: Only available when DTMF Type is
Info/Info+Inband/Info+RFC2833.

DTMF Payload: To configure payload type for DTMF.
Note: By default, DTMF type is RFC2833 which is the
standard. Type Inband uses inband frequency to indicate
DTMF tone which is most used to be compatible to
traditional telephone server. Type Info use SIP Info message
to indicate DTMF message.
To display and configure call-related features.

Max Local SIP Port: To configure maximum local sip port
for designated account.

Min Local SIP Port: To configure minimum local sip port
for designated account.

Caller ID Header: To configure which Caller ID format to
fetch for displaying on Phone UI.

Auto Answer: If enabled, IP phone
answered when there is an incoming call for
designated account.

Provisional Response ACK: 100% reliability for all
provisional message, this means it will send ACK every
time the IP phone receive a provisional SIP message
from SIP server.

User=phone: If enabled, IP phone will send user=phone
within SIP message.

Anonymous Call: If enabled, all outgoing call for the
designated account will ben anonymous number.

Anoymous Call Rejection: If enabled, all incoming
anonym-out call for the designated account will be
rejected.

Missed Call Log: To display the miss call log.

Prevent SIP Hacking: Enable to prevent SIP from hacking.
To display or configure session timer settings.

Active: To enable or disable this feature, If enable, the
will be auto-