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12 User Manual
1.1 Capacity
1.1.1 Capacity
You can connect the following number of extensions and outside lines to your system.
* ISDN (BRI) port 2 and ISDN (BRI) port 3 can be selected to be used for a CO line or ISDN extension
line (Default : port 2 — CO line/port 3 — Extension). The maximum capacity of the system depends
on the line selection. See below.
Basic
System
Module
Expansion
Maximum
Capacity
KX-TD612
CO line (ISDN (BRI) line)
(Analogue CO Line)
Extension line
4 (2)
—
12
2 (1)
1
—
6 (3)*
1
12
Line Selection ISDN CO Line
ISDN
Extension
Line
Extension
Line
3 ISDN (BRI) ports are selected for CO line 6 0 12
2 ISDN (BRI) ports are selected for CO line 4 8 12
1 ISDN (BRI) port is selected for CO line 2 16 12