MP1800 Router Install Manual V1
.2
Usually, syn/asyn serial port is connected to the external Modem or TA
(terminal adapter) and serves as the dialup interface. Just select the
appropriate baud rate. The syn serial port can work in DTE and DCE
modes. The two devices that are directly connected should work in DTE
and DCE mode respectively. The DCE device provides the syn clock and
specifies the communication rate, while the DTE device accepts the syn
clock and communicates according to the specified baud rate. Usually, the
router serves as DTE device. Whether the type of the device connected to
the router is DTE or DCE refers to the MP1800 manuals.
Typical DTE and DCE devices
Device Type
Interface Type
Typical Device
DTE Pin
type
PC
Router
DCE Hole
type
MODEM
Multiplexer
CSU/DSU
2.
Rate and transmission distance
Sync/async serial supports different signal standards and baud rate in
different working modes. Choose cables according to prevailing actual
conditions. The maximum transmission distance of the signals and the set
BR depend on the selected cables.
V.24 cable rate and transmission distance:
BR (bps)
Max. transmission distance (m)
2400 60
4800 60
9600 30
19200 30
38400 20
64000 20
115200 10
V.35 cable rate and transmission distance:
BR (bps)
Max. transmission distance (m)
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