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This chapter describes how to configure a SWAN interface.  The physical link should be set up as shown in
chapter 2, according to the type of modem or device at the other end of the connection and the type of SWAN port.

STEP ONE
The first step in the SWAN interface configuration is to define its physical characteristics.  These parameters are
presented in the Physical Menu Table.

Physical Menu  CONFIG=>INTERFACE=>SWAN=>PHYSICAL

Mode

Asynchronous or Synchronous.  This parameter is determined by the mode of the
device at the other end of the connection.

Clock Source

Applies for 

Synchronous Mode

.  Whether this interface provides clock for the device at

the other end of the cable or vice-versa. When the interface is connected to a modem,
the 

Clock Source

 is always 

External

.

Receive Clock

Applies for 

Internal Clock Source

.  When this interface provides clock, it can either

compare incoming messages with the clock it is generating (

Internal

) or with the clock

it receives from the sender along with the message (

External

).  

Externa

l is

recommended.

Speed

Applies for 

Internal Clock Source

.  Determines at which speed the data will be sent

across the line.

Media for SWAN
Cable

Type of cable -- RS-232, V.35 or X.21. Usually the type is cable is detected by the
router.