1/5/2007
EAG Gateway Series Administration Guidelines
MAG-06007 Rev. A
number range is: 1 ~ 6.
T.38 Change Port
Set whether to change the UDP
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port when gateway changes to T.38 function. The default value is
No.
․
Yes:
Use new UDP port;
․
No:
Use the RTP port established during the initial connection.
T.38 ECM Mode
Select
On
or
Off
to indicate whether to invoke T.38 error detection mode. Default value is: Off.
․
On:
Enable error detection mode. When error occurs and is detected, gateway automatically
re-sends fax.
․
Off:
Disable error detection mode.
V.21
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Dective
Setup whether to enable V.21 fax error detection. Default value is: On.
Note:
It is not necessary to enable V.21 if fax machine can send normal signals. Set this parameter to
Off to reduce DSP processing load.
․
On:
Enable
․
Off:
Disabled
T.38 NSF
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Modify
Setup whether to shield from non-standard fax transmission. Default value is: On. Recommendation:
Set it to on.
․
On:
Shield from non-standard transmission.
․
Off:
Not shield from non-standard transmission.
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Port has two meanings in network technology. One is the physical port, via which other equipments can be
connected. The other is the logical port, interfacing with different network protocols. Logical port can be of two
types as well, depending what protocols we are talking about. One is TCP port, the other is UDP port. UDP port
is a protocol port for data packages. No connection between client and server is required to use this port.
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V.21 is an ITU-T recommendation for full-duplex communication between two analogue dial-up modems
using audio frequency-shift keying modulation at 300 bauds to carry digital data at 300 bit/s. If fax machine
doesn’t get any fax signal, the gateway can detect any fax signal throughV.21.
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Non-standard fax facilities are those whose operation features are not defined by ITU. Some of those features
are encoded in FIF but their encoding method was not defined.
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