3com MSR 20 User Manual

Page of 240
SIC-1SAE
27
Figure 15   RS449 DCE cable
RS530 DTE cable 
Figure 16   RS530 DTE cable
RS530 DCE cable 
Figure 17   RS530 DCE cable
For the pinouts of synchronous/asynchronous serial cables (with DB-28 
connectors), see Low-End and Mid-Range Series Routers Cable Manual.
n
These cables are optional items. Please select one when purchasing a SIC-1SAE 
card; by default, the cable is not provided.
Connecting the Interface
Cable
w
WARNING:
Before plugging or unplugging the interface cable connected to the SIC-1SAE 
card, power off the router. Online insertion or removal tends to damage the 
port and even the device.
Before connecting the SIC-1SAE card to a remote device, identify the type of 
the device, such as its synchronous/asynchronous mode and DTE/DCE mode, 
and the signaling criterion, baud rate and time clock required by the access 
device.