Panasonic KX-TD500 System Reference Manual page 353

2. The E-1 card needs to be installed to free slot no.1, 5 or 9.
The physical port number for each E-1 Digital Trunk channel is as follows:
Slot No. Channel
1 1~16 ch
17~32 ch
5 1~16 ch
17~32 ch
9 1~16 ch
17~32 ch
X: Shelf No. (1=Basic, 2=Expansion 1, 3=Expansion 2)
Note:
• The channels #16 and #32 are used as to the signaling channel, therefore
these channels are not available for CO line programming.
3-F-93
Port No.
X0101~X0116
X0201~X0216
X0501~X0516
X0601~X0616
X0901~X0916
X1001~X1016