3Com MSR 50, MSR 30 manual Fax protocol pcm g711alaw g711 μlaw, Undo fax protocol

2687

[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-redundancynumber: Indicates the number of low-speed redundant packets.
	The number argument ranges from 0 to 5, and defaults to 0.
	hb-redundancynumber: 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.