Estimate Voice Traffic Calculations - Nortel 1000 Description, Installation And Operation Manual

Traffic forecasting is a process that often requires several tries to achieve
satisfactory results. For example, a WAN might not have enough bandwidth
to support all the IP trunks required; therefore the codec choice or the number
of trunks provisioned must be adjusted.

Estimate voice traffic calculations

Follow the steps in Procedure 4 to calculate an estimate of voice traffic.
Procedure 4
Estimating voice traffic
1 Calculate Voice on IP traffic.
CCS/user=# of calls/set * Average Holding Time (in seconds)/100
Total voice CCS (Tv) = CCS/user x No. of VoIP users
The number of VoIP users (telephones) is the potential population in the
system that can generate/receive traffic through the IP Trunk 3.01 (and
later) node. This number may be estimated for a new Meridian 1
customer.
If the installation is for an existing customer, base the VoIP traffic on
measured route traffic from traffic report TFC002, which provides CCS for
each route. A customer must determine the amount of expected private
network voice traffic.
2 Calculate Fax on IP traffic
CCS/user sending fax = # of pages sent/fax * Average Time to send a
page (default 48 seconds)/100
CCS/user receiving fax = # of pages received/fax * Average Time to
receive a page (default 48 seconds)/100
Total fax CCS (Tx) = CCS/fax sent*No. of users sending fax + CCS/fax
received* No. of users receiving fax
The user sending or receiving a fax can be the same person or different
persons. It is the number of faxed documents and the average number of
pages per faxed document that are important. The time unit for fax traffic
is also the busy hour. The busy hour selected must be the hour that gives
the highest combined voice and fax traffic.
3 Total the ITG CCS.
Total IP Trunk 3.01 (and later) traffic (T) = Tv + Tx
ITG engineering guidelines
IP Trunk Description, Installation, and Operation
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