13
MULTIPORT CSU/DSU
3.1.1 DIP S
WITCH
S
ET
S1
You can use the DIP switches on set S1 to configure the DTE rate, RTS/CTS delay,
anti-stream timer, data format, character length, and Extended Signalling Rate
(ESR). Default settings are shown in
Table 3-1
. All settings are shown in
Table
C-1
. Detailed descriptions for each switch in the set appear below and on
pages
13–14
.
Table 3-1. S1 Summary Table.
Position Function
Factory
Default
S1-1
DTE Rate
Off
DTE Rate equals
S1-2
DTE Rate
Off
Line Rate
S1-3
DTE Rate
Off
S1-4
RTS/CTS Delay
Off
Normal
S1-5
Anti-Stream Timer
Off
Off
S1-6
Data Format
Off
Synchronous
S1-7
Character Length
Off
10 Bits
S1-8
Extended Signal Rate
Off
Off
Switches S1-1, S1-2, and S1-3: Data Rate
Use switches S1-1, S1-2, and S1-3 to configure the DTE rate of the CSU/DSU. This
rate represents the synchronous or asynchronous rate at which the DTE must
connect to the CSU/DSU’s interface module.
Table 3-2. Settings for Switches S1-1, S1-2, and S1-3.
S1-1
S1-2
S1-3
DTE Rate
On
On
On
2.4 kbps
On
On
Off
4.8 kbps
On
Off
On
9.6 kbps
Off
On
Off
19.2 kbps
On
On
Off
38.4 kbps
Off
On
On
DTE Rate=Line Rate*
*NOTE
To achieve 56 kbps or 64 kbps, use this switch combination.
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