## Error Conditions

Assuming proper administration, most of the problems reported by telephone users are likely to be LAN-based. Quality of Service, server administration, and other issues can impact user perception of IP telephone performance.

The Avaya one-X Deskphone Edition for 9600 IP Telephones Installation and Maintenance Guide covers possible operational problems that might be encountered after successful 9600 Series IP Telephone installation. The following User Guides also contain guidance for users having problems with specific IP telephone applications:

- Avaya one-X Deskphone Edition for 9620 IP Telephone User Guide
- Avaya one-X Deskphone Edition for 9630 IP Telephone User Guide