3Com MSR 30, MSR 20, MSR 50 manual Interface attributes of SIC-8AS

SIC-8AS 63

Connecting the Interface Cable

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CAUTION: When connecting the optical fiber, observe the following

■Do not over-bend the optical fiber. Its curvature radius must be no less than 10 cm (3.9 in).

■Ensure that the Tx and Rx ends are correctly connected.

■Ensure that the fiber ends are clean.

w WARNING: Laser danger: Invisible laser radiation may be emitted from the fiber-optic ports which are connected to lasers. To protect your eyes against radiation harm, never stare into an open fiber-optic port.

Step 1: Insert the SFP optical module into its corresponding slot.

Step 2: Locate the Rx and Tx ports of the SIC-1FEF interface. Connect them to

another device with two optical fibers: Rx to Tx and Tx to Rx.

Step 3: Power on the router and check the behavior of the LINK LED on the SIC-1FEF panel. ON means an Rx link is present and OFF means the opposite. In the latter case, check the line status.

SIC-8AS

Introduction SIC-8AS, the 8-port asynchronous serial interface card, is mainly used to transceive and process the asynchronous data streams.

SIC-8AS has these features:

■Each asynchronous serial port provides a rate up to 115.2 Kbps.

■Supports the terminal access service and asynchronous dedicated line.

■Serves as the small-/medium-sized ISP dial-up access server when an asynchronous serial port is used for dial-up.

Interface Attributes The following table describes the interface attributes of SIC-8AS.

Table 35 Interface attributes of SIC-8AS

Attribute	Description
Connector	DB60
Number of connectors	1
Interface cable	Customized cable with 8-port RJ-45
	connector
Interface standard	RS232
Minimum baud rate	300 bps
Maximum baud rate	115.2 Kbps