Avaya VoIP Monitoring Manager Reference Release 3.0 Manual de usuario descargar pdf (Pagina 115)

Troubleshooting

107

Handling Jitter

Removing Jitter

Jitter can result from bad queuing strategies set-up on network equipment. Check your equipment

manual for recommended settings. To remove jitter the endpoints need to collect packets and

hold them long enough to allow the slowest packets to arrive, allowing them to be played at even

intervals in the correct sequence, which causes additional delay.

Jitter Effects

Jitter can create audible voice-quality problems if the variation is greater than 60ms. Symptoms of

excessive jitter could be reported as crackling or static. A faulty microphone or other hardware

problems can be reported as a similar sound problem to jitter but they are not related. You need

to rule out that this is not the cause of the problem.

See Also

Troubleshooting

Interpreting the Values Using Summary Reports or Detailed Reports

Interpreting RSVP Status

The RSVP status can change during a session. For example, if the RSVP status for a single

endpoint in a session has changed between significant states (such as Failed and Success) then

VoIP Monitoring Manager will use the label Various to represent this situation. However, if the

status has only changed from Pending to Success, then VoIP Monitoring Manager will report

Success. Also, the RSVP status can be different for each endpoint in the session. For example,

RSVP may be disabled for one endpoint in the session, and enabled for the other.

The RSVP status can be:

Unknown:

Information about the RSVP status was not available.

Disabled:

The end-point has been configured to ignore RSVP signaling.

Not in Use:

RSVP is enabled for use but there is no receiver RTP channel

session active, or no attempt has been made by the sender to protect

the receiver’s RTP channel (i.e. no Path message has been

received).

Reservation Pending:

This state indicates that the receiver has responded to the first Path

message it has received since the call started with a Resv message,

and is waiting for a ResvConf to confirm the reservation is installed.

Reservation Failed:

This state indicates that the receiver has had a reservation fail or

timeout, or an existing reservation was torn down prematurely.

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Avaya VoIP Monitoring Manager Reference Release 3.0 Manual de usuario Pagina 115