HPE FlexNetwork MSR Series User Manual

197
Item Description
Fax Protocol
Configure the protocol used for fax communication with other devices.
• T.38 —With this protocol, a fax connection can be set up quickly.
• Standard T.38—It supports H.323 and SIP.
Configure the fax pass-through mode.
• G.711 A-law.
• G.711 μ-law.
The pass-through mode is subject to such factors as loss of packet, jitter, and delay, so
the clocks on both communication sides must be kept synchronized. Only G.711 A-law
and G.711 μ−law are supported, and the VAD function should be disabled.
Number of
Redundant
Low-speed T.38
Packets
Low-speed data refers to the V.21
command data.
This option is configurable when
T.38 or standard T.38 is selected as
the fax protocol.
IMPORTANT:
Increasing the number of redundant packets
improves reliability of network transmission and
reduces packet loss ratio. A great amount of
redundant packets, however, can increase
bandwidth consumption to a great extent and
thereby, in the case of low bandwidth, affect the
fax quality seriously. Therefore, the number of
redundant packets should be selected correctly
according to the network bandwidth.
Number of
Redundant
High-speed T.38
Packets
High-speed data refers to the TCF
and image data.
This option is configurable when
T.38 or standard T.38 is selected as
the fax protocol.
Max
Transmission
Rate of Fax
Specify the maximum fax transmission rate:
24000 bps
—Set the maximum transmission rate to 2400 bps.
4800 bps
—Negotiate the baud rate first in accordance with the V.27 fax protocol. The
maximum transmission rate is 4800 bps.
9600 bps
—Negotiate the baud rate first in accordance with the V.29 fax protocol. The
maximum transmission rate is 9600 bps.
14400 bps
—Negotiate the baud rate first in accordance with the V.17 fax protocol. The
maximum transmission rate is 14,400 bps.
Allowed Max Voice Speed of the Codec Protocol
—Determines the maximum fax
rate depending on the codec protocol.
• If G.711 is adopted, the maximum fax transmission rate is 14,400 bps and the fax
protocol is V.17.
• If G.723.1 Annex A is adopted, the maximum fax transmission rate is 4800 bps and
the fax protocol is V.27.
• If G.726 is adopted, the maximum fax transmission rate is 14,400 bps and the fax
protocol is V.17.
By default, the
Allowed Max Voice Speed of the Codec Protocol
option is adopted.
• If G.729 is adopted, the maximum fax transmission rate is 7200 bps and the fax
protocol is V.29.
IMPORTANT:
If an option other than the default option is adopted, the maximum rate is negotiated first
in accordance with the corresponding fax protocol.
Fax Training
Mode
Specify the fax training mode:
• Local—The gateways participate in the rate training between fax terminals. In this
mode, rate training is performed between fax terminals and gateways,
respectively, and then the receiving gateway sends the training result of the
receiving fax terminal to the transmitting gateway. The transmitting gateway
finalizes the packet transmission rate by comparing the received training result
with its own training result.
• Point-to-Point—The gateways do not participate in the rate training between two
fax terminals. In this mode, rate training is performed between two fax terminals
and is transparent to the gateways.

HPE FlexNetwork MSR Series Specifications

General

Brand	HPE
Model	FlexNetwork MSR Series
Category	Network Router
Language	English