User manual

This is the KBU 64
80-10100000-09
1–1
1. This is the KBU 64
1.1 Introduction
The KBU 64 Kilostream Backup Unit provides an effective, easy to
implement, automatic backup for X21 Kilostream or other leased digital
data circuits, over the ISDN (Integrated Services Digital Network).
ISDN is a public switched digital network, enabling simultaneous multi-
service connection over a single pipe, consisting of two 64Kbit/s streams
and one 16Kbit/s control channel.
The KBU 64 is available either as a dual channel device (offering backup
facilities to two independent 64Kbit/s lines, or one 128Kbit/s line when
used in conjunction with a Fivemere MCX 128 multiplexer). It is also
available as a Rackmount version which allows up to a maximum of 13
units (i.e. 13 X Dual-Channel KBU 64s), each offering the same facilities
already discussed.
The KBU 64 is designed to sit in the data path between the Kilostream
Network Termination Unit (NTU) and your user equipment, see Figure
1.1.
Full details of the rackmounted KBU 64 are provided in KBU 64 User
Manual 80-10100001.