NEC Xen Topaz Features And Specifications Manual page 318

NEC Business Solutions Ltd
To set up a Tandem Call:
Chapter 4 - 310
1. Answer first trunk call.
2. Press HOLD to place the first trunk call on Hold.
3. Place second trunk call.
4. Press Transfer key (PGM 15-07 or SC 851: 06) or hang up.
This sets up an Unsupervised Conference with both outside parties.
The line keys for the trunks light steadily (red).
To disconnect the Conference, use Forced Trunk Disconnect (i.e., Press line key + 724).
XEN Topaz
Features