Appendix A
67
Figure 7: Connecting a BRI to an ISDN Telephone
Figure 8: Connecting a BRI to an NT
PRI
The PRI is usually connected to a PBX or switch (LE). Type and pin outs of these devices vary
depending on the manufacturer. In most cases, a straight RJ-45 to RJ-45 can be used to connect the
PRI with a PBX. A crossover cable is required to connect to a NT1, as illustrated in Figure 9.
Warning:
Network hazardous voltages are present in the PRI cables. If you detach the cable, detach
the end away from the SmartNode or interface card first to avoid possible electric shock. Network
hazardous voltages may be present on the device in the area of the PRI port, regardless of when
power is turned OFF.
Caution:
To prevent damage to the system, make certain you connect the PRI cable only to the PRI
Port and not to any other RJ-45 Socket.
Hardware Installation Guide, Revision 3.11
