Cortelco 8012 - Manual (Page 60)

60
Multiple Handset Operation
If more than one handset is registered to a base, internal calls can be made between
handsets and external calls may be transferred between handsets.
Internal Calling
1. Press . The display will show a list of available handsets.
2. Enter the number of the handset to be called.
3. If the handset number is valid, the called handset will ring and display HSX
Calling.
If the destination handset is not available, the calling handset will return to
standby mode.
4. Press to answer an internal call.
5. Press to end the internal call.