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ITG Engineering Guidelines Page 81 of
378
ITG Trunk 2.0 ISDN Signaling Link (ISL) Description, Installation and Operation
T-LAN traffic calculations
The following are calculation procedures for T-LAN:
1 Calculate Voice on IP Traffic
CCS/user=# of calls/set * Average Holding Time (in seconds)/100
Total voice CCS (Tv) = CCS/user*No. of VoIP users
The number of VoIP users (telephone sets) is the potential population
in the system that can generate/receive traffic through the ITG node.
This number may be estimated for a new Meridian 1 customer.
If the installation is for an existing Meridian 1 customer, the VoIP traffic
should be based on measured route traffic from traffic report TFC002,
which provides CCS for each route. A customer must provide the input
about how much private network voice traffic is expected to be offered
to the IP network.
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 to send or receive 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 ITG traffic (T) = Tv + Tx