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cnft38params
tcf-method
err-corr-enable
nsf-oride-enable
nsf-ccode
nsf-vendor
Command Modes
VoIP switching/trunking
Usage Guidelines
Follow standard CLI procedures for this command.
Examples
The following example shows that the T.38 fax transfer parameters for a line number 2 are configured
with a maximum fax transmission rate of 7200 bps, a fax information field size of 28 bytes, a primary
high-speed data packet size of 20 ms, a low-speed packet transmission redundancy of 3, a high-speed
packet transmission redundancy of 0, the network TCF verification method, UDP error correction
enabled, NFS code VISM override enabled, a country code of 500, and a vendor code of 4000:
Cisco VISM Installation and Configuration Guide
5-222
(Optional) Training check field (TCF) verification method for UDP based fax
transport. It can be one of the following values:
•
1 = Local—for TCP-based fax transport or UDP-based fax transport.
The local TCF method implies that the media gateways are actively involved
in the training and data rate management procedure, including the generation
of the TCF signal. Data rate management is performed by one of the media
gateways on the basis of local results, which are forwarded over the IP
network by the other media gateway. The data rate management gateway
generates the TCF training signal toward its group 3 fax terminal.
2 = Network—for UDP-based fax transport.
•
The network TCF method implies that the data rate management is
performed end-to-end between the group 3 fax terminals. The TCF training
signal is passed by the IP network.
(Optional) Forward error correction scheme for UDP-based fax transport. It can
be one of the following values:
1 = On (Default)
•
2 = Off
•
(Optional) VISM nonstandard facilities (NSF) code override of NSF,
nonstandard facilities command (NSC), and nonstandard facilities setup (NSS)
T.30 signals. It can be one of the following values:
1 = On (Default)
•
If you enable NSF override, the group 3 fax machines are prevented from
synchronizing with each other on the basis of a protocol other than the ITU-T
recommendations.
2 = Off
•
If you disable NSF override, the group 3 fax machines synchronize to the
standard T-series protocol.
(Optional) Country code in the NFS code which identifies the country where the
NFS fax equipment was manufactured, defined as one byte. Refer to ITU T.38 for
a complete description. It can be in the range from 0 to 65535. (Default = 181)
(Optional) Vendor code of the NFS fax equipment manufacturer, defined as two
bytes. It can be in the range from 0 to 65535. (Default = 18)
Chapter 5
Release 3.0, Part Number OL-2521-01 Rev. D0, June 2004
CLI Commands
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