User`s manual

SIP User's Manual 5. Web Management
Version 5.0 59 December 2006
Table 5-3: Protocol Definition, General Parameters (continues on pages 58 to 64)
Parameter Description
Session Expires Method
[SessionExpiresMethod]
Defines the SIP method used for session-timer updates.
Re-INVITE
[0] = Use Re-INVITE messages for session-timer updates
(default).
UPDATE
[1] = Use UPDATE messages.
Note 1: The gateway can receive session-timer refreshes using both methods.
Note 2: The UPDATE message used for session-timer purposes is not included in
the SDP body.
Asserted Identity Mode
[AssertedIdMode]
Disable [0] = None (default).
Adding PAsserted Identity
[1].
Adding PPreferred Identity
[2].
The Asserted ID mode defines the header that is used in the generated INVITE
request. The header also depends on the calling Privacy: allowed or restricted.
The P-asserted (or P-preferred) headers are used to present the originating party’s
Caller ID. The Caller ID is composed of a Calling Number and (optionally) a
Calling Name.
P-asserted (or P-preferred) headers are used together with the Privacy header. If
Caller ID is restricted, the ‘Privacy: id’ is included. Otherwise for allowed Caller ID
the ‘Privacy: none’ is used. If Caller ID is restricted (received from Tel or
configured in the gateway), the From header is set to
<[e-mail]>.
Fax Signaling Method
[IsFaxUsed]
Determines the SIP signaling method used to establish and convey a fax session
after a fax is detected.
No Fax
[0] = No fax negotiation using SIP signaling (default).
T.38 Relay
[1] = Initiates T.38 fax relay.
G.711 Transport
[2] = Initiates fax using the coder G.711 A-law/µ-law with
adaptations (refer to note 1).
Fax Fallback [3] = Initiates T.38 fax relay. If the T.38 negotiation fails, the
gateway re-initiates a fax session using the coder G.711 A-law/µ-law with
adaptations (see note 1).
Note 1: Fax adaptations:
Echo Canceller = On
Silence Compression = Off
Echo Canceller Non-Linear Processor Mode = Off
Dynamic Jitter Buffer Minimum Delay = 40
Dynamic Jitter Buffer Optimization Factor = 13
Note 2: If the gateway initiates a fax session using G.711 (option 2 and possibly
3), a ‘gpmd’ attribute is added to the SDP in the following format:
For A-law: ‘a=gpmd:0 vbd=yes;ecan=on’. For µ-law: ‘a=gpmd:8
vbd=yes;ecan=on’.
Note 3: When ‘IsFaxUsed’ is set to 1, 2 or 3 the parameter ‘FaxTransportMode’ is
ignored.
Note 4: When the value of IsFaxUsed is other than 1, T.38 might still be used
without the control protocol’s involvement. To completely disable T.38, set
FaxTransportMode to a value other than 1.
Detect Fax on Answer Tone
[DetFaxOnAnswerTone]
Initiate T.38 on Preamble
[0] = Terminating fax gateway initiates T.38 session on
receiving of HDLC preamble signal from fax (default)
Initiate T.38 on CED
[1] = Terminating fax gateway initiates T.38 session on
receiving of CED answer tone from fax.
Note: This parameters is applicable only if ‘IsFaxUsed = 1’.
SIP Transport Type
[SIPTransportType]
Determines the default transport layer used for outgoing SIP calls initiated by the
gateway.
UDP
[0] (default).
TCP
[1].
TLS
[2] (SIPS).
Note: It is recommended to use TLS to communicate with a SIP Proxy and not for
direct gateway-gateway communication.