The hour during the specified day with the highest total wideband call usage, when summed over all trunk groups. Peak hour and busy hour are synonymous. With conventional traffic theory data analysis, there are two methods for determining the peak hour. One is the time-consistent peak hour, meaning hourly usage values are averaged across days for each hour of the day. The other is the bouncing peak hour, meaning the highest usage is selected for each day without regard to the average across days. For the bouncing peak hour, the highest load on a given day may or may not occur during the time-consistent busy hour. These traffic reports and accompanying trunk group data worksheet only use the bouncing peak hour method. Note that if the total usage for the current hour equals the total usage for the previous peak hour, the peak hour is the hour with the greatest number of total seizures.

Group Number. A number that identifies each trunk group associated with the displayed data. Group numbers are displayed in numerical order, beginning with the lowest administered number and continuing to the highest administered number.

Group Size. The number of administered trunks in the trunk group.

Trunk Group Direction. Identifies whether the trunk group is incoming (inc), outgoing (out), or two-way (two).

Service Type. The administered Service Type for the trunk group. Valid entries are accunet, i800, inwats, lds, mega800, megacom, multiquest, operator, other, outwats-bnd, public-ntwrk, sdn, sub-operator, and wats-max-bnd.

Measurement Hour. The hour, using 24-hour clock, in which the measurements are taken. For the last-hour report, it is the last hour of measurement. Measurement hour for each trunk group is identical, but not necessarily the same as the indicated peak hour for the day. For the today-peak report, the measurement hour is the peak hour for each trunk group. Measurement hour for each trunk group can be different. For the yesterday-peak report, the measurement hour is the peak hour for each trunk group yesterday. Measurement hour for each trunk group can be different.

Total wideband call usage (in CCS) for all trunks in the trunk group. Represents the total time the trunks are busy processing wideband calls.

Total Seizures. The number of wideband call attempts. This measurement includes completed calls, false starts, don’t answers, and busies.

Incoming Seizures. The number of wideband incoming call attempts. This measurement includes completed calls, false starts, don’t answers, and busies. The number of Outgoing Seizures can be calculated as follows:

Group Overflow. The number of outgoing wideband calls attempted when the remaining trunk group capacity is insufficient to accommodate the call or the trunk group’s remaining bandwidth is in the wrong configuration. This measurement does not include unauthorized calls denied service on the trunk group (due to restrictions).

The number of wideband calls equals the number of actual calls, regardless of the number of trunks involved in the call.

Out of Service. The number of trunks in the trunk group out of service (listed as maintenance busy) at the time the data is collected.

Suggested action: If the trunks are removed from service by the switch, then the appropriate maintenance personnel should be notified. The objective is to keep all members of a trunk group in service. Generally, you should not make adjustments to the trunk group because of Out of Service trunks, but should get those trunks returned to service. For specific details, refer to the Trunk Out of Service report.

Suggested actions:

• If the group direction is outgoing or two-way, a high number in the % ATB field and nothing in the Grp Ovfl indicates everything is functioning normally. However, a more typical scenario is a high number in this field and a high number in the Grp Ovfl field. This indicates a possible problem that necessitates further analysis. Unless this trunk group is the last preference in the pattern, overflow is to the next choice trunk group, and the number in the Grp Ovfl field is of no great significance. Otherwise, the obvious choice is to add more trunks to the trunk group.

• If the group direction is incoming, a high number in this field is bad. It indicates some incoming calls are probably blocked. Generally, you want to add more trunks. Therefore, the % ATB and the number of calls blocked is low.

Percentage Outgoing Blocking. The percentage of offered wideband calls not carried on the trunk group. It does not include unauthorized wideband calls denied service on the trunk group (due to restrictions) or calls carried on the trunk group but do not successfully complete at the far end (where there is no answer). The calls not carried are calls made when the remaining trunk group capacity is insufficient to serve them. The Percentage Outgoing Blocking is calculated as follows:

The number of Outgoing Seizures is calculated as follows:

Outgoing Seizures = Total Seizures - Incoming Seizures

Similarly, the equation for calculating Outgoing Calls Offered is as follows:

Outgoing Calls Offered = Group Overflow + Outgoing Seizures