rivet

if the issue is internal calls then the opperator has to switch on call waiting ............. when a caller from the inside wants to get her (or him)..must say that )) they ring ie 201 they then gey the bust tone
they then press 1 on there handset (this then sends the call waiting tone)
to switch on call waiting at a phone

off hook

*7311 beep in ear
*7312 voice through speaker phone
*7313 voice through Handset