Weed Eater 2600 manual Voice Port Testing Commands, Configuring Voice Level Adjustment section on

Cisco High-Density Analog Voice and Fax Network Module

Configuration Tasks

Table 4	Troubleshooting Voice Port Configurations (continued)
Problem		Suggested Action
Jerky or choppy speech		Variable delay, or jitter, is being introduced by congestion in the
		packet network. Two possible remedies are to:
		• Reduce the amount of congestion in your packet network.
		Pings between VoIP endpoints will give an idea of the
		round-trip delay of a link, which should never exceed 300 ms.
		Also examine network queuing and dropped packets.
		• Increase the size of the jitter buffer with the playout-delay
		command. (See the “Configuring Adaptive Jitter Adjustment”
		section on page 20.)
Clipped or fuzzy speech		Reduce input gain. (See the “Configuring Voice Level
		Adjustment” section on page 21.)
Clipped speech		Reduce the input level at the listener’s router. (See the
		“Configuring Voice Level Adjustment” section on page 21.)
Volume too low or missed DTMF		Increase speaker’s output level or listener’s input level. (See the
		“Configuring Voice Level Adjustment” section on page 21.)
Echo interval is greater than 25 ms		Configure the echo-cancel enable command and increase the
(sounds like a separate voice)		value for the echo-cancel coverage keyword. (See the
		“Configuring Echo Adjustment” section on page 21.)
Too much echo		Reduce the output level at the speaker’s voice port. (See the
		“Configuring Voice Level Adjustment” section on page 21.)

Voice Port Testing Commands

These commands allow you to force voice ports into specific states for testing. They require the use of Cisco IOS Release 12.0(7)XK or 12.1(2)T or a later release, and they apply to Cisco 2600 series, Cisco 3640, and Cisco 3660 routers. The following types of voice-port tests are covered:

•Detector-Related Function Tests (optional)

•Loopback Function Tests (optional)

•Tone Injection Tests (optional)

•Relay-Related Function Tests (optional)

•Fax/Voice Mode Tests (optional)

Cisco IOS Release 12.2(2)XT and 12.2(8)T

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