Lucent Technologies Release 8.2 manual Performance, Overview, Definitions

D Capacities and Performance

Performance

Overview	This section presents methods for estimating:
	• the impact on the processor
	• the impact on the TDM bus
	• the number of C-LAN boards
	• the number of MedPro boards
	Given assumptions about:
	• the number of H.323 endpoints:
	~ # of road-warrior applications
	~ # of telecommuter applications
	~ # of native H.323 phones
	~ # of H.323 Tie trunks
	~ # of H.323 DID trunks
	• average number of C-LAN connections per H.323 endpoint
	• number of audio streams per DSP
	• grade of service (GOS)
	• average call holding times
Definitions	Offered Load. The telephone traffic arriving at a system for processing. The offered
	load is equal to or greater than the carried load.
	Carried Load . The telephone traffic actually processed by a system. The carried
	load is equal to or less than the offered load.
	Endpoint Carried Load. The average number of IP Softphones + H.323 trunks on
	active calls to the DEFINITY system.
	Socket Carried Load. The average number of active C-LAN connections between
	the local DEFINITY system and the IP Softphones + H.323 trunk-connected remote
	DEFINITY systems.
	Socket. A software data structure associated with a connection between the C-LAN
	board and an endpoint.
	Grade of Service (GOS). If the call load offered to a system can exceed its
	maximum capacity, there is a probability that some calls will be blocked. The GOS is
	a specification of the probability that one or more calls will be blocked. The
	probability is expressed in the form, P0...0X. For example, a GOS of P01 specifies
	that, in the long run, calls will be block 1% of the time; P0001 specifies that calls will
	be blocked 1/100th of 1% of the time.
	Full Availability. The capacity is sized to the carried load.

Administration for Network Connectivity
555-233-504 — Issue 1 — April 2000	CID: 77730	409