Digital devices: Their have a 4-wire connection to the exchange.
The dialing number can be programmed for all devices and call forward, hold and conference call are feasible with them (using the function buttons).
- 7401plus: It can handle 1 main line. Function button 1 and 2 cannot be programmed on the device.
- 7410plus: Device can handle 3 calls from trunk line and extension and has a connection jack for outer speaker.
- 7406plus: Device can handle 3 calls from trunk line and extension. It is a hands-free device and has a display.
- 7407plus: Device can handle 3 calls from trunk line and extension. It is a hands-free device and has a display.
Between 2 calls 2 seconds waiting is needed!