User manual

KBU 64
User Manual
80-10100000-095–8
5.4 Backup to Dual Kilostream Links at Two Sites
In a dual 64Kbit/s synchronous Kilostream link application, it is
necessary that when a failure of the link occurs, the failure is detected
and a backup is automatically initiated via the ISDN.
The unit then monitors the faulty Kilostream, to which data is
automatically restored once the link is functional and has been checked.
ISDN
(Backup Circuit)
SITE A
SITE B
SITE C
User
Equipment
User
Equipment
64 K bps Kilostream Line
channel 1
N
T
U
N
T
U
channel 1
KBU 64
channel 2
KBU 64
KBU 64
64 K bps Kilostream Line
channel 1
N
T
U
N
T
U
Figure 5.3 Dual Kilostream Backup Link to Two Sites