Offered traffic is a measurement that is normally obtained directly from the trunk group or line being examined.
In the DMS, offered traffic is called “incoming attempts” for trunks and “origination attempts” for lines.
These figures are referred to as “peg counts” – in actuality they are software registers peged by the call processing software whenever such an event occurs.
In the DMS, these registers are available from OM’s – Operational Measurements.
Every switch, whether it be Nortels DMS or Lucent’s 4/5e track the same information.