82 CHAPTER 7: SUPPLEMENTARY VOICE CALL SERVICESTo toggle back and forth between the two calls, simply press and release theswitch hook button.3 To end an initial call when you hear the Call Waiting tone (instead of putting thecall on hold) hang up the phone and wait for it to ring. (The phone rings toindicate that there is a an incoming call and the B-channel LED flashes.)You are connected to the second call when you pick up. Or, if you already have acall on hold while on an active call and you want to end the active call beforereturning to the call on hold, hang up the phone and wait for it to ring back. Pickup the phone to reconnect to the call on hold.What if the active caller hangs up from the far end?If the active caller hangs up from the far end, the call on hold will remain on holduntil you retrieve it by pressing and releasing the switch hook button.What if the call on hold is dropped from the far end?If the call on hold is dropped from the far end, you will receive no notice. If youpress and release the switch hook button, you will remain on the same call.Disconnecting a Call on HoldTo disconnect a call on hold, you must first make a call on hold active in order todrop it. To make the call on hold active, press and release the switch hook button.Then, simply hang up the phone to drop the active call.The ISDN LAN modem can support a maximum of two simultaneous voice calls perphone port. An incoming call is rejected and the caller hears the “user busy” toneif you already have two calls up (one active and one on hold). An incoming CallWaiting call will also be rejected if you are making an outgoing call and the call isnot yet active, or if your telephone is already ringing for an incoming call. In otherwords, you are only able to receive a call using the Call Waiting feature when youhave one active call.
