Hewlett-Packard Mediant 2000 User's Manual
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Brand: HP
Category: Gateway
Type: Operation & user’s manual for HP Mediant 2000
Pages: 496 (6.06 Mb)
Version 5.8 373 October 2009
SIP User's Manual 6. Configuration Parameters Reference
Parameter Description
Web: Fax Relay ECM Enable
EMS: Relay ECM Enable
Determines whether the Error Correction Mode (ECM) mode
is used during fax relay.
[FaxRelayECMEnable]
[0]
Disable = ECM mode is not used during fax relay.
[1]
Web: Fax/Modem Bypass Coder
Type
EMS: Coder Type
Enable = ECM mode is used during fax relay (default).
Coder used by the device when performing fax/modem
bypass. Usually, high-bit-rate coders such as G.711 should be
used.
[FaxModemBypassCoderType]
[0]
G.711Alaw= G.711 A-law 64 (default).
[1] G.711Mulaw = G.711 µ
Web/EMS: CNG Detector Mode
-law.
Determines whether the device detects the fax Calling tone
(CNG).
[CNGDetectorMode]
[0]
Disable = The originating device doesn’t detect CNG;
the CNG signal passes transparently to the remote side
(default).
[1]
Relay = CNG is detected on the originating side. CNG
packets are sent to the remote side according to T.38 (if
IsFaxUsed = 1) and the fax session is started. A Re-
INVITE message isn’t sent and the fax session starts by
the terminating device. This option is useful, for example,
when the originating device is located behind a firewall that
blocks incoming T.38 packets on ports that have not yet
received T.38 packets from the internal network (i.e.,
originating device). To also send a SIP Re-INVITE
message upon detection of a fax CNG tone in this mode,
set the parameter FaxCNGMode to 1.
[2]
Web/EMS: Fax CNG Mode
Events Only = CNG is detected on the originating side
and a fax session is started by the originating side using
the Re-INVITE message. Usually, T.38 fax session starts
when the ‘preamble’ signal is detected by the answering
side. Some SIP devices don’t support the detection of this
fax signal on the answering side and thus, in these cases it
is possible to configure the device to start the T.38 fax
session when the CNG tone is detected by the originating
side. However, this mode is not recommended.
Determines the device's behavior upon detection of a CNG
tone.
[FaxCNGMode]
[0]
= Does not send a SIP Re-INVITE upon detection of a
fax CNG tone when CNGDetectorMode is set to 1 (default).
[1]
Web: Fax/Modem Bypass Packing
Factor
EMS: Packetization Period
= Sends a SIP Re-INVITE upon detection of a fax CNG
tone when CNGDetectorMode is set to 1.
Number of (20 msec) coder payloads that are used to
generate a fax/modem bypass packet.
The valid range is 1, 2, or 3 coder payloads. The default value
is 1 coder payload.
[FaxModemBypassM]