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36 CHAPTER 3: INSTALLING THE HARDWARE
The ISDN U port uses an RJ-45 connector. In the U.S. and Canada, you do
not need a separate NT1 between the bridge/router and the ISDN outlet
because the NT1 is built into the model 44x bridge/router.
For more information on ISDN cables, see “ISDN S/T Cable” on page 170.
Model 45x and 54x 56/64K CSU/DSU
Models 45x and 55x bridge/routers have a 56/64K CSU/DSU connector.
The 56/64K CSU/DSU port uses an RJ-48S connector.
For more information on CSU/DSU cables, see “56/64K CSU/DSU Cable”
on page 173.
Model 46x and 56x T1/FT1
Models 46x and 56x bridge/routers have a T1/FT1 RJ-48 connector.
The T1/FT1 Telco port uses an RJ-48 connector.
56/64 Kbps
CSU/DSU cable
LinkLine
Act
Line
Error
Connect
Fault
(CSU/DSU)
B1 B2
WAN
DDS
wall outlet
RJ-48 T1 cable
LinkLine
Act
Line
Error
Connect
Fault
(CSU/DSU)
B1 B2
WAN
wall outlet