I can't remember if the computer had an internal modem or it was connected by a serial port. Either way it would have been harder to just mirror the traffic. We

I can't remember if the computer had an internal modem or it was connected by a serial port. Either way it would have been harder to just mirror the traffic. We looked into some tracing tool but it cost hundreds of dollars. Decided the workaround was easier, especially since the Mac OS 9 was a few years old at that point and the users would eventually upgrade.