Factory Reset Of Phone Has Deleted 802.1X Shared Secret; Audio Problems; No Speech Path; Choppy Speech - Cisco 7821 Administration Manual

Cause
These errors typically indicate that 802.1X authentication is not enabled on the phone.
Solution
If 802.1X is not enabled on the phone, see 802.1X Authentication section.

Factory Reset of Phone Has Deleted 802.1X Shared Secret

Problem
After a reset, the phone does not authenticate.
Cause
These errors typically indicate that the phone has completed a factory reset while 802.1X was enabled. A
factory reset deletes the shared secret, which is required for 802.1X authentication and network access.
Solution
To resolve this situation, temporarily move the phone to a network environment that is not using 802.1X
authentication. After the phone starts up normally, access the 802.1X configuration menus to enable device
authentication and to reenter the shared secret. See 802.1X Authentication section for details.
Related Topics
Basic Reset, on page 195

Audio Problems

The following sections describe how to resolve audio problems.

No Speech Path

Problem
One or more people on a call do not hear any audio.
Solution
When at least one person in a call does not receive audio, IP connectivity between phones is not established.
Check the configuration of routers and switches to ensure that IP connectivity is properly configured.

Choppy Speech

Problem
A user complains of choppy speech on a call.
Cisco IP Phone 7821, 7841, and 7861 Administration Guide for Cisco Unified Communications Manager 10.0 (SIP)
Audio Problems
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