Mitel SX-2000 - Manual (Page 237)

Specifications
50003510 Revision A 223
Assumptions made for this example of receiver requirements
- CLASS hold time = 4.51 seconds average for incoming traffic
- For ACD applications the 100% of total traffic is assumed for the incoming traffic
- For heavy traffic conditions p.999 is recommended.
CLASS Receiver Requirements for Heavy Traffic
LS/CLASS
Circuits
Total Calls
per hour
Incoming
Percentage
of total
traffic
CLASS rcvr
Traffic Load
Erlangs
Required CLASS
receivers for ERLANG B
Grade of Service
P.99 P.999
4 50 35% 0.02 2 2
50 100% 0.06 2 3
8 99 35% 0.04 2 2
99 100% 0.12 2 3
12 144 35% 0.06 2 3
144 100% 0.18 3 3
16 251 33% 0.10 2 3
251 100% 0.31 3 4
20 360 31% 0.14 2 3
360 100% 0.45 3 5
24 478 31% 0.19 3 3
478 100% 0.60 4 5
28 594 30% 0.22 3 4
594 100% 0.74 4 5
32 730 29% 0.27 3 4
730 100% 0.91 5 6
36 829 29% 0.30 3 4
829 100% 1.04 5 6
40 962 28% 0.34 3 4
962 100% 1.21 5 7
44 1095 28% 0.38 3 4
1095 100% 1.37 6 7
48 1226 28% 0.43 3 4
1226 100% 1.54 6 7
Note: Shaded configurations exceed number of system allowable receivers (5)