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[Sysname-voice-dial] entity 10 pots
[Sysname-voice-dial-entity10] fax nsf-on
fax protocol
Syntax fax protocol { t38 | standard-t38 } [ hb-redundancy number | lb-redundancy
number ]
fax protocol pcm { g711alaw | g711μlaw }
undo fax protocol
View POTS/VoIP entity view
Parameter t38: Uses T.38 fax protocol. With this protocol, a fax connection can be set up
quickly.
standard-t38: Uses the standard T38 protocol, which supports H.323 and SIP.
lb-redundancy number: Indicates the number of low-speed redundant packets.
The number argument ranges from 0 to 5, and defaults to 0.
hb-redundancy number: Indicates the number of high-speed redundant packets.
The number argument ranges from 0 to 2, and defaults to 0.
pcm: Enables the transparent transmission in the passthrough mode.
g711alaw: Enables G.711 A-law.
g711ulaw: Enables G.711 μ-law.
Description Use the
fax protocol command to configure the type of protocol used for fax
communication with other devices.
Use the
undo fax protocol command to restore the default type of protocol
used for fax communication with other devices.
With the T.38 protocol adopted, if the call adopts H.323, the fax will use the
standard T.38 negotiation mode stipulated by the H.323; if the call adopts SIP, the
fax will use the standard T.38 negotiation mode stipulated by SIP.
By default, T.38 negotiation mode is used for fax.
■ Low-speed data refers to the V.21 command data, while high-speed data refers
to the TCF and image data.
■ To communicate with leading fax terminals in the industry, the standard T.38
protocol must be selected. Likewise, to communicate with other fax terminals
supporting a T.38 protocol, the T.38 protocol must be adopted. As the leading
devices do not support local training mode for fax, the point-to-point training
mode must be adopted in order to implement interworking with the leading
devices in the industry.