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Table 4. Network Address Selection for Model 3510 (4 of 4)
Network
Network
Address
Address
56
57
58
59
60
61
62
63
64 (Default)
F = Front
R = Rear
DSU Strap Setting Descriptions
The following information provides DSU strap setting descriptions.
S1-1 and S1-2: Timing – The DSU comes from the factory with digital data system
(DDS) timing selected. DDS timing is required when the DSU is connected to the DDS
network. Three other types of timing (receive, internal and external) are available for
LADS use.
S1-3: Circuit Assurance – When enabled, the DSU does not turn on the DTE
Clear-to-Send (CTS) interface lead unless the CTS timing delay has expired and the
DSU receiver is getting a data signal from the network (received line signal detector
lead is on).
When disabled, the CTS interface lead turns on in response to the Request-to-Send
lead if there is a valid data or control signal from the network.
NOTE:
If the DTE Request-to-Send (RTS) interface lead is ON, and the DSU is not
receiving a data signal from the network, the DSU sends a continuous MARK
signal to the network.
1
2
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
R
R
15
Switch S4 Selection
3
4
F
R
F
R
F
R
F
R
F
F
F
F
F
F
F
F
R
R
5
6
R
R
R
F
F
R
F
F
R
R
R
F
F
R
F
R
R
R
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