User manual

The Front & Rear Panel Descriptions
80-10100000-09 3–7
3.5 ISDN
A fixed lead and plug is supplied for connection to your ISDN outlet,
providing two 64Kbit/s channels.
In the UK, the ISDN access point (NT1) has two sockets. The sockets
are internally connected to each other so either may be used for the KBU
64
When a KBU 64 is connected to an ISDN network, the network assigns
an address, called the Terminal Endpoint Identifier, to the KBU 64. To
prevent the network becoming confused if KBU 64 devices are powered
OFF or exchanged, at least 30 seconds should elapse between plugging
a KBU 64 into the NT1 and powering ON the KBU 64.
See Figure 3.3 below for details of the RJ45 pin numbering.
Cable Entry
point
Pin 8
Latch, at rear
Pin 1
Figure 3.3 RJ45 Connector showing pin connections
The pin assignment on the RJ45 is with pin 1 on the left, with the plug
pins facing you and the cable entry pointing downwards.