14
MULTIPORT CSU/DSU
Switch S1-4: RTS/CTS Delay
The RTS/CTS delay is the amount of time it takes for CTS to change logic state
following an RTS transition. Use Switch S1-4 to select the RTS/CTS delay
(measured in msec).
Table 3-3. Settings for Switch S1-4.
RTS/CTS Delay in msec. at Various Line Rates
S1-4
Delay
56
19.2
9.6
4.8
2.4
Off
Normal
0.3
0.9
1.9
3.8
7.5
On
Extended
1.3
3.8
7.5
15
30
Switch S1-5: Anti-Stream Timer
The anti-stream timer protects multidrop networks from a drop that is
continuously transmitting. If the DTE keeps RTS raised for more than the time
value in 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. Use Switch S1-5 to enable the timer.
Table 3-4. Settings for Switch S1-5.
Timer Value in Sec. at Various Line Rates
S1-5
Timer
56
19.2
9.6
4.8
2.4
On
Disabled
not applicable
Off
Enabled
2
4
8
15
30
Switch S1-6: Data Format
Use Switch S1-6 to configure the CSU/DSU for synchronous or asychronous
connection to the DTE.
Table 3-5. Settings for Switch S1-6.
S1-6
Setting
Off
Synchronous
On
Asynchronous
