Cisco Systems WS-X6624-FXS Digital Signal Processing per Port, FXS Interface Features, Default

Features

Table 1 24-Port Analog Interface Module Features

Digital Signal Processing per Port

G.711, G.729, G.729A voice encoding

Silence suppression and voice activity detection

Comfort noise generation

Ringer, software programmable frequency and cadence, based on country

Dual tone multifrequency (DTMF) detection

Signaling, loop start

Modem detection

Line echo cancellation (32 ms)

Impedance (600 ohms)

Programmable analog gain, signaling timers

SPAN or port mirroring support

FXS Interface Features

Address signaling formats: In-band DTMF

Signaling formats: Loop start

Ringing tone: Programmable

Ringing voltage: Programmable, based on country

Ringing frequency: Programmable, based on country

Distance: 500 ohms maximum loop

Fax and modem transport parameters are listed in Table 2.

		Table 2	Fax and Modem Transport Parameters
		Parameter Name		Description	Default
		Fax relay enable		Enables/disables fax relay support in the gateway.	Checkbox checked
				Enabling this parameter will result in the gateway
				attempting fax relay negotiation as part of the call
				setup. If it is enabled but the far end does not
				support fax relay, the fax call will switch to
				pass-through mode.
		Fax error correction		ECM is a feature present in some higher-end fax	Checkbox checked
		mode (ECM) override		models that enables fax pages to be transmitted
				error free. If ECM is enabled, the transmission has
				a low tolerance to jitter and packet loss. This results
				in a higher number of failed fax calls. For better
				reliability (even with higher packet loss), ECM
				needs to be disabled. ECM is disabled by enabling
				the checkbox.
		Maximum fax rate		Defines the maximum fax transmission rate to be	14400
				used during the fax call. This can be used to restrict
				the bandwidth utilized for fax transmission.
	Catalyst 6500 Series 24-Port FXS Analog Interface Module Installation Note
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