Avocent Cyclades-PR2000 Swan and Async Interfaces, Clock Source is always External

Cyclades-PR2000

CHAPTER 6 THE SWAN AND ASYNC INTERFACES

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. The async interface, provided on an RJ-45 connector, is the same as the SWAN interface except that the synchronous option does not appear in the CONFIG =>INTERFACE =>SWAN =>PHYSICAL menu and the only encapsulation option is PPP.

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

Parameter	Description
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). External is
	recommended.
Speed	Applies for Internal Clock Source. Determines at which speed the data will be sent
	across the line.
Media for SWAN	Type of cable -- RS-232, V.35 or X.21. Usually the type is cable is detected by the
Cable	router.

Chapter 6 - The SWAN and Async Interfaces 45