[ns] Need help coming up with script for scenario

[Brenda Lindsay Williams]

Hi everyone...
Pls I'm working on a project which involves carrying out experiments on a
VoIP core network...based on QoS performance metrics...jitter, latency,
bandwidth consumption, e.t.c
I wanna connect 3-4 WAN models to the core network...
The core network consists of routers which routes packets amongst the
different WANs...
Pls can someone give me or suggest a tcl script depicting VoIP traffic in
such a scenario?
I'm carrying out a perfomance evaluation between ATM core network and
Gigabit Ethernet core network...using QoS parameters as performance metrics
Thanks.

regards,

Brenda