User`s manual

SIP User's Manual 138 Document #: LTRT-83303
Mediant 1000 & Mediant 600
Parameter Description
Fax Signaling Method
[IsFaxUsed]
Determines the SIP signaling method for establishing and transmitting a
fax session after a fax is detected.
 [0] No Fax = No fax negotiation using SIP signaling. Fax transport
method is according to the parameter FaxTransportMode (default).
 [1] T.38 Relay = Initiates T.38 fax relay.
 [2] G.711 Transport = Initiates fax / modem using the coder G.711 A-
law/µ-law with adaptations (refer to Note below).
 [3] Fax Fallback = Initiates T.38 fax relay. If the T.38 negotiation fails,
the device re-initiates a fax session using the coder G.711 A-law/µ-law
with adaptations (refer to the Note below).
Notes:
 Fax adaptations (for options 2 and 3):
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
 If the device 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:8 vbd=yes;ecan=on'.
For µ-law: 'a=gpmd:0 vbd=yes;ecan=on'.
 When IsFaxUsed is set to 1, 2, or 3, the parameter FaxTransportMode
is ignored.
 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.
 For detailed information on fax transport methods, refer to ''Fax/Modem
Transport Modes'' on page 399.
Detect Fax on Answer
Tone
[DetFaxOnAnswerTone]
Determines when the device initiates a T.38 session for fax transmission.
 [0] Initiate T.38 on Preamble = device to which terminating fax is
connected initiates T.38 session on receiving HDLC preamble signal
from fax (default).
 [1] Initiate T.38 on CED = device to which terminating fax is connected
initiates T.38 session on receiving CED answer tone from fax.
Note: This parameters is applicable only if IsFaxUsed is set to 1.
SIP Transport Type
[SIPTransportType]
Determines the default transport layer for outgoing SIP calls initiated by the
device.
 [0] UDP (default)
 [1] TCP
 [2] TLS (SIPS)
Notes:
 It's recommended to use TLS for communication with a SIP Proxy and
not for direct device-to-device communication.
 The value of this parameter is also used by the SAS application as the
default transport layer for outgoing SIP calls - only applicable for
Mediant 1000.
SIP UDP Local Port
[LocalSIPPort]
Local UDP port for SIP messages.
The valid range is 1 to 65534. The default value is 5060.