The Avaya IP 500 Analog Phone 2 Card (700431778) provides 12 RJ45 ports for your business needs. The first two ports are analog extension ports for the connection of analog telephones. It can also be fitted with an IP500 trunk interface card that uses an additional 4 ports for connections. This card also supports up to 4 per IP500 or IP500 V2 control unit running IP Office, and 3 per IP500 V2 control unit running IP Office Partner Version.