Check the listing for details. Avaya Partner Voice Messaging PVM PCcard. Condition: Used. Listed at 19.99 USD. The Avaya Partner system is an older discontinued more traditional Phone System but will be in service for 20 more years to come. It does not require a PC or Administrative software for functionality and as long as you connect the phone lines and the phones to the right ports on the system you can make and receive and phone calls and is as close to plug and play as you will ever get! It has 175 built in features such as remote call forwarding to external phone numbers such as a cell phone number so you can still be accessible to your customers and not be at the office. The Partner ACS system starts with a capacity of up to 3 analog phone lines and up to 8 Partner phones and is comfortably expandable up to 12 analog phone lines and up to 32 Partner phones with mailboxes for all users. The Partner system’s maximum capacities are up to 31 lines and up to 48 extensions (can’t be obtained simultaneously).