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3000 Series User Guide 15
Connecting to an ISDN Line
How you make the connection from your 3000 Series to an ISDN line
depends on whether your ISDN module is an ISDN U or ISDN S/T module.
Check the back panel of your gateway router to identify the ISDN module
installed.
ISDN U Module
Note: You can install this module only in slot 3 (D3).
The ISDN U module has a built-in Network Termination (NT1) device. The
NT1 provides for a direct connection to the ISDN network. When you use the
ISDN U module, you cannot use any other ISDN device on the ISDN line.
To connect your ISDN U module,
1. Connect one end of the RJ-45 ISDN cable (not supplied with your router)
to the RJ-45 ISDN connector on your ISDN U module.
2. Connect the other end of the ISDN cable directly into an ISDN wall jack.
D
ISDN U
B1
B2
D
01
ISDN S/T
B1
B2
3000 Series
3000 Series
VO
I
C
E
OICE
V
1
V1
D
1
D1
D
2
D2
D
3
D3
E
T
H
ETH
V
2
V2
V
3
V3
V
4
V4
DATA
A
L
M
ALM
O
K
OK
P
W
R
PWR
Internet or
Other WAN