Panasonic KX-TD500 System Reference Manual page 244

2.10 Flexible SCO/GCO Assignment
Description 1. CO lines of the same trunk group can be assigned to both GCO (as a
group unit) and SCO (as a single unit) at a time.
Assuming that Trunk Group 01 consists of the following CO lines.
TG01
Case 1.
GCO-01
EXT.100
(Appearance of the call indication in Case 3.)
SCO has priority over GCO when incoming CO calls come.
When an outside call via CO line-10101 comes in on an extension, the
call indication appears on SCO-10101, not on GCO-01.
However it may appear on GCO-01, if SCO-10101 is in use as follows.
(Example)
1. SCO-10101 is in use.
2. Indication of the call which comes in on Ext.100 via CO line-10101
appears on GCO-01.
1.
EXT.100
SCO-10101 is lit
in green.
CO line 10101
CO line 10102
CO line 10103
CO line 10104
Case 2.
SCO-10101
SCO-10102
SCO-10103
SCO-10104
EXT.100
2.
SCO-10101
SCO-10102
GCO-01
GCO-01 is flashing
in red or green.
3-D-26
Case 3.
SCO-10101
SCO-10102
GCO-01
EXT.100
SCO-10101
SCO-10102
GCO-01
EXT.100