Nx Networks 3000 - Manual (Page 31)

3000 Series User Guide 17
4. Connect one end of an ISDN cable to the NT1 U interface port and the
other end to the ISDN wall jack. The ISDN cable for this connection is
dependent on your NT1 device.
Setting the S/T Switch
There is an S/T switch on the ISDN S/T module. You can slide the switch to 0
or 1. Setting the switch to 0 means that no terminating resistor is in use.
Setting the switch to 1 means that the ISDN S/T module terminates the ISDN
cable with a 100-ohm resistor.
For point-to-point connections (shown in the following figure), set the switch
to 1. For all other configurations, consult your NT1 manual for the proper
setting. In a point-to-point connection, there is one ISDN device on an ISDN
line.
3000 Series
3000 Series
VOIC E OICE
V1 V1
D1 D1 D2 D2 D3 D3 ETH ETH
V2 V2 V3 V3 V4 V4
DATA ALM ALM OK OK PWR PWR
Internet or
Other WAN Telephone
Fax
NTI
D
0 1
ISDN S/T
B1
B2
S/T Switch