7-28 DBS 576 (USA) issued October 2000 576-36-700Chapter 7. SLT Features Section 700 - OperationIntercom CallingDescriptionThe System provides two methods of intercom calling:• Voice Calling: Extension calls are connected immediately, without a ringing tone.• Tone Calling: A ringing tone is sent to the called extension.Extension Class of Service (COS) programming determines whether the default for the originatingextension is voice or tone calling. Regardless of the default, you can toggle between voice or tonecalling by entering the Tone-Voice Call feature code. For example, if the extension default is tonecalling, you can make a voice call to another extension by entering the Tone-Voice Call feature accesscode.OperationTo make a call using Intercom Calling:Hardware Requirements• N/ARelated Programming• FF1-0-03: Extension COS (Intercom Calling Type)• FF1-0-03: Extension COS (Voice Call Send)• FF1-0-03: Extension COS (Voice Call Receive)• FF3: Extension COSConsiderations• Both the called and calling parties must belong to an Extension COS that allows Voice Calling.• You cannot change from voice calling to tone calling.Action Result1. Lift the handset. Intercom dial tone2. Dial the extension number.3. If your extension is set for tone calling and you want tomake a voice call, enter 1.Or, if your extension is set for voice call and you want tomake a tone call, enter 1.4. Speak when your call is answered5. Replace the handset.