Ok, here's what you do.

First, you have to tell the switch to make a call but drop the line. Dial a 1-800 number and play a 2600Hz tone into the receiver. This will trick the switch into dropping the line but leave the circuit open. Then, instruct the J1P057B frame to add a secondary relay to the Datakit 202 modem on the J1P056B1 for the telemetry. That way, it won't report back to the central office, but you'll have an input to the switch. When you have this input, instruct the DCTU to run a line-dry test by engaging the SM263 power amplifiers, but don't disconnect the line, you want it wet instead of dry. This has the effect of blowing out the tone generator at the local office, which, when your friends phone rings, won't actually ring but will experience an overload on the primary input. They'll know, trust me.

You have to grab your phone and move it quickly back and forth near your wide-open mouth while it's calling the person. It's best to tilt your head back a little while you do it. The more people who witness this, the louder it will ring.

You have to get THEIR phone and change your ringtone.

Call them 78 times in a row, that usually does the trick.

You send an SMS and you call right behind it

You need to figure out how to make caller ID not show your number when you call them...

https://www.youtube.com/watch?v=Rf_jKzB3SLY