Lucent Technologies Release 8.2 manual of the screen, Stratum, Port Network

Other Networking-Related DEFINITY Screens A Screens Reference

Synchronization Plan

This screen assigns primary and secondary external synchronization sources. This provides synchronization between the switch and digital facilities that the switch is connected to. When the switch is connected to digital facilities, the switch (both Processor Cabinets and Expansion Cabinets) must be synchronized to the incoming data rate of 8,000 frames-per-second. This timing information reference may be derived from DS1 facilities or from a Stratum 3 external clock. Loss of the reference signal, excessive phase changes, and variation in timing frequency can cause loss of data or dropped data connections. When no external digital facilities, including Stratum 3 external clocks, are present or when a switch is the "master" node of a network providing timing to the rest of the network, the timing can come from an oscillator on the switch’s tone/clock circuit pack.

The Synchronization Plan may not be required for some digital connections. The switch’s internal clock may suffice.

Page 1 of the screen

						Page 1 of X
		SYNCHRONIZATION PLAN
	SYNCHRONIZATION SOURCE (circuit				pack location)
	Stratum: _
	Port Network: _
	Primary: ___			Secondary: ___
Location Name		Slip	Type	Location		Name	Slip	Type
01C17	______________	D	UDS1-BD	_____	_______________		_	___
01C18	______________	Y	TBRI-BD	_____	_______________		_	___
_____	_______________	_		_____	_______________		_	___
_____	_______________	_		_____	_______________		_	___
_____	_______________	_		_____	_______________		_	___
_____	_______________	_		_____	_______________		_	___
_____	_______________	_		_____	_______________		_	___
_____	_______________	_		_____	_______________		_	___
NOTE: TN722B	& TN464B DS1 sources result in			stratum 4, type II synchronization

Stratum	Enter the stratum level to be used for synchronization.
	Valid entries	Usage
	3, 4	Stratum 3 capability is only possible when
		using a TN780 Tone Clock circuit pack.
Port Network	Only displays when the Stratum field is 3.
	Valid entries	Usage
	Display-only field.

		Administration for Network Connectivity
304	CID: 77730	555-233-504 — Issue 1 — April 2000