Polycom RMX 2000 - Manual (Page 30)

Chapter 1- Hardware Description
1-24
11 Connect the RJ-45 terminated PRI cables into any of the slots labeled
PRI1 - PRI12:
Up to 9 PRI cables can be connected to an RTM ISDN card, with each
card providing connection for up to 7 E1 or 9 T1 PRI lines. When two
RTM ISDN cards are installed, up to a total of 18 PRI cables can be
connected.
LAN
Power
PRI Cables