Cisco 1605-R How To Use Manual page 81

Figure 3-30 Connecting the 2-Port ISDN BRI Card
RJ-45 ports
B1
B2
VIC
2B-S /T TE
OK
ISDN BRI S/T 1
ISDN BRI S/T 0
Straight-through
RJ-45-to-RJ-45 cable
SEE
MAN UAL
BEF ORE
INTA LLA TION
S/T port
Connecting WAN and Voice Interface Cards to a Network 3-33
2-Port ISDN BRI Card
NT1 device