Black Box MT160A Manual page 23

MicroCSU/DSU Cards and MicroRacks
Mode
The mode of operation, Switched or Dedicated, is selected with these switches. The
appropriate transmitter clocking modes can be selected for Dedicated DDS or
campus-area (private) operation.
SW2-5 SW2-6
On Off
Off Off
On On
Anti-Stream Timer
The anti-stream timer protects multidrop networks from a drop that is
continuously transmitting. If the terminal keeps RTS raised for more than 30
seconds, the timer forces RTS off internally. This allows the rest of the multidrop
network to resume operation. The CSU/DSU remains in the forced-off condition
until the terminal drops RTS.
SW2-7 Timer
On Disabled
Off Enabled
CTS Delay
The RTS/CTS turn-on delay can be set to Normal or Extended.
SW2-8 CTS Delay
Off Normal
On Extended
20
Mode
External Clock Mode
Network Clock Mode
(Looped Clock Mode)
Internal Clock Mode
Timer Value in Sec. at Various Line Rates
56
—
2
Delay in mSec. at Various Line Rates
56
0.3
1.3
Description
Transmit Clock derived from
terminal interface
Transmit Clock derived from
from the received line signal; Use
this mode for Dedicated DDS
operation
Transmit Clock derived internally
19.2 9.6
— —
4 8
19.2 9.6
0.9 1.9
3.8 7.5
4.8 2.4
— —
15 30
4.8 2.4
3.8 7.5
15 30