Tinny Audio (Drain Pipe) - Mitel MiVoice Business Voice Quality And Troubleshooting Manual

Voice Quality Troubleshooting Guide
THE ISSUE IS
OCCURRING ON . . .
One end of the call only
(single IP phones).
Silence occurs during
an IP phone call.

TINNY AUDIO (DRAIN PIPE)

THE ISSUE IS
OCCURRING ON . . .
Calls involving the VoIP
network.
IP or TDM calls over
digital trunks.
Calls with a specific
external phone.
Calls involving a
speakerphone.
52
Table 21: Silence
PROBABLE CAUSE
Default gateway IP address or subnet
mask not configured correctly in IP
Phone.
IT administrator was performing
maintenance on routers during
business hours. Router sent a redirect
signal to either the IP phone or MiVoice
Business platform while the call was in
progress. The redirect signal caused
the connection to be broken.
Table 22: Tinny Audio (Drain Pipe)
PROBABLE CAUSE
Call is using compression.
Faulty digital link descriptor
programming.
External party is using a phone that is
not TIA-compliant (for example: a cell
phone or a residential wireless phone).
One party is using a speakerphone.
CORRECTIVE ACTION
Check Gateway IP address of the IP phone.
Access the Configuration (Debug) Menu on
the phone to view its settings and network
parameters, including its Gateway IP
address (refer to the MiVoice Business
Troubleshooting Guide for instructions).
Perform router maintenance after business
hours.
CORRECTIVE ACTION
Configure Bandwidth Management and Call
Admission Control to ensure adequate
bandwidth. See Bandwidth Management in
the MiVoice Business System
Administration Tool online help for details.
Remove compression and add bandwidth.
Access the Digital Link Descriptor form in
the System Administration tool. Ensure that
the link descriptors are programmed
correctly.
Refer to "Identifying the Source of Echo" on
page 55 to confirm that the echo is
originating in the far-end equipment. Inform
customer that this issue is not being caused
by Mitel equipment.
Reduce volume of speakerphone.
Relocate speakerphone away from reflective
surfaces.
Instruct user to move closer to
speakerphone.
Switch to handset.
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