Patton electronic SmartNode 4110 Series CED retransmission, Mode profile voip profile-name, Volume

SmartWare Software Configuration Guide 47 • VoIP profile configuration

Step	Command	Purpose
4	node(pf-voip)[name]#fax volume	Adjusts the volume of the fax signals re-generated
(optional)	volume	on the receiver side. The volume is in dB, in the
		range -18.5 ... -3.5 (Default: -9.5dB).
5	node(pf-voip)[name]# fax max-bit-	Sets maximum allowed bit-rate for fax relay
(optional)	rate { 2400 4800 7200 9600	(Default 14400 Bit/sec).
	12000 14400 }
6	node(pf-voip)[name]# fax detection	Selects the method when fax transmissions are
(optional)	{ ced-tone fax-frames }	detected: By CED tone or by fax frames (Default:
		ced-tone). It takes longer to detect Fax frames than
		CED tones, but the risk of misdetection is mini-
		mized.
7	node(pf-voip)[name]#no fax error-	Disables error correction mode (Default: enabled).
(optional)	correction	If the error correction mode is disabled, the con-
		nected fax devices cannot negotiate error correc-
		tion mode. Connections with error correction mode
		enabled are more sensitive to packet loss. Disable
		error correction mode when packet loss is more
		than 2–3%.
		Note Error correction mode does
		not cancel IP packet loss.
8	node(pf-voip)[name]#no fax hdlc	Disables HDLC image transfer (Default: enabled).
(optional)		If HDLC mode is enabled, the SmartNode removes
		bit-stuffing, checks CRCs of fax frames arriving
		from the PSTN and regenerates the CRCs before
		sending fax frames towards the PSTN. HDLC can
		only be enabled together with error correction.
		Disable HDLC when the fax peer does not support
		this mode.

T.38 CED retransmission

Even if the user has configured redundant transmission for low-speed and high-speed packets the T.30 Indica- tor messages are not included in this process. If the CED message gets lost, the remote device only receives the CED Tone that is sent in-band. But the transmitted in-band tone may be short due to T.38 switchover or too much distortion, such as by using a low bit-rate voice coder like G.723. In this case it is possible that the remote device never starts the initial T.30 procedure, because it has never received the CED tone. For that rea- son SmartWare sends the CED three times in an interval of 100ms with the same sequence number. With this command, you can disable this feature or set the number of retransmissions to a user defined value.

Mode: profile voip profile-name

Step Command Purpose

1[name] (pf-voip)[name]#[no] fax ced- Specifies the number of CED retransmissions.

retransmission number Default: 2

VoIP profile configuration task list 587