Lucent Technologies Comcode 108678723 manual Final notes, Application scenarios, Test results

DEFINITY ECS Release 8.2 ATM Installation,	Issue 1
Upgrades, and Administration 555-233-124	April 2000

1Preparing for Installation and Upgrades

Determine ATM Switch Suitability 1-12

Table 1-6. Application scenarios

Number of 2-party calls	2516	0	0	0	0	1258
Number of 3-party calls	0	1118	0	0	0	279
Number of 4-party calls	0	0	629	0	0	78
Number of 5-party calls	0	0	0	402	0	25
Number of 6-party calls	0	0	0	0	279	18

Table 1-7. Test results

Constraint 1: Timeslots	1	1	1	1	1	1
Constraint 2: PMP roots	1	1	1	1	1	1
Constraint 3: PP	1	1	1	1	1	1
Constraint 4: PMP leaves	1	1	1	1	0	1
Constraint 5: PMP endpoints	1	1	1	1	1	1
Constraint 6: Total SVCs	1	1	1	1	1	1
Constraint 7: Per-port SVCs	1	1	1	1	1	1
Constraint 8:Performance	1	1	1	1	1	1
Constraint 9:Trunk bandwidth	1	1	1	1	1	1

Final notes

The goal is to engineer the network so that in all reasonable applications, you always run out of DEFINITY time slots before running out of ATM switch resources. This is required to provide acceptable service to the customer.

These calculations factor in phone calls only. There is no specific accommodation for the ATM SVC cache, or for special features such as music, announcements, and group paging. The theory behind using 500 as the number of timeslots in a port network rather than the real number (484) is to allow for a normal amount of these special features. If you use multiple music on hold, group paging, and so forth, you may need special engineering.

This calculator determines that an application is PROBABLY feasible if it can handle reasonable activity mixes. The three columns in Table 1-7 that have bold entries define what is meant by reasonable. These tests require that the switch be able to handle a complete suite of 2-party calls, a complete suite of 3-party calls, and a mixed suite that involves some calls of each type. For best results, your application should pass all the constraint tests.

Any ATM switch that processes transit traffic (that is, connections that do not either originate or terminate on any of the port networks directly attached to it) may require special engineering. This is possible if the number of trunks on the