3300 ICP Hardware User Guide
58 Release 3.3
3300 Universal NSU Protocols
The 3300 Universal NSU provides T1 or E1 connectivity and supports up to two links per unit.
The protocols supported by the interfaces are:
• T1 - PRI, Q.Sig, DPNSS, T1/D4
• E1 - PRI, Q.Sig, DPNSS, DASSII
• PRI variant - DMS-250, DMS-100, 4ESS, NI-2, 5ESS, and Euro ISDN (NET5, Q.SIG)
Protocol variant - EURO_STANDARD, EURO_NUMERIS, EURO_CAYMAN,
NI2_STANDARD, NI2_5ESS, NI2_GTD5, QSIG_ISO, QSIG_ETSI)
3300 Universal NSU DIP Switch Settings
Note: Q.SIG uses Master/Slave. All others use User/Network. T1/E1 running PRI or Q.SIG will
support XNET over PRI, NFAS, D-Channel Backup, and Min/Max functionality.
Hybrid Port DIP Switch Settings
DIP Switch Use Notes
1Tx Ground Ground when down; floating when up.
2Rx Ground Ground when down; floating when up.
3Impedance selector #1 120 ohm (enabled when down)
4Impedance selector #2 100 ohm (enabled when down)
5Impedance selector #3 75 ohm (enabled when down)
6LT/NT selector Up for NT; down for LT.
PRI/T1 Mode Connector DIP Switch Settings
Impedance 1 Tx Gnd 2 Rx Gnd 3
I #1
4
I #2
5
I #3
6
LT/NT
100 Up Up Up Down Up Down
E1/MF-R2 Mode/Connector DIP Switch Settings
BNC Adapter
Required Impedance
1
Tx
Gnd
2
Rx
Gnd
3
120
ohm
4
100
ohm
5
75
ohm
6
LT/NT
No 120 Up Up Down Up Up Up
No 120 Up Up Down Up Up Down
Yes 75 Note Note Up Up Down Up
Yes 75 Note Note Up Up Down Down
Note: Site dependant - normally Tx is grounded and Rx is not grounded, but that depends on which
remote connection is grounded.