Avaya IP500 Analog Phone 8
700417231 

• Provides 12 RJ45 ports - The first 8 ports are analog extension ports for the connection of analog telephones.  It can be fitted with an IP500 daughter card that uses an additional 4 ports for connections.
• Power Failure Transfer - When fitted with an IP500 Analog Trunk daughter card, the combination supports 1 power failure extension to trunk (loop-start only) connection
• Maximum -  4 per IP500 control unit

Avaya IP500 Analog Phone 8 

• Provides 12 RJ45 ports - The first 8 ports are analog extension ports for the connection of analog telephones.  It can be fitted with an IP500 daughter card that uses an additional 4 ports for connections.
• Power Failure Transfer - When fitted with an IP500 Analog Trunk daughter card, the combination supports 1 power failure extension to trunk (loop-start only) connection
• Maximum -  4 per IP500 control unit