Inter-Tel 550.2126 Axxess 16 Port Single Line Card SLC+ Phones Uplink Ports : Two (2)

Uplink Ports : Two (2) open WIC slots and One (1) open NM module slot

and auto-dial numbers

A half duplex speakerphone is included with the Toshiba DP5022-SDM

5 REN per port

If you need a replacement Bizfon 680 expansion

Inter-Tel 550.2126 Axxess 16 Port Single Line Card SLC+ Phones Uplink Ports : Two (2)Inter Tel 550. 2126 Axxess 16 Port Single Line Card SLC+ Description: The Inter Tel 550. 2126 is an 16 port single line card designed for supporting single line telephones, faxes, or modems. The 550. 2101 has built in ring generators in order to provide ring voltage. The module is compatible with Inter Tel Axxess phone systems and is also know as the SLC+ card. Inter Tel 550. 2126 Features: 16 Port Card Integrated Ring Generators Compatibility: Single