====== CCME Intercom ======

===== General =====
  * When pressed, it will call the intercom extension which will beep an auto-answer with speaker phone and mute. This is what's provided the one way audio.
  * The recipient can setup a two way call by pressing the mute button to unmute the call.
  * Cannot be used on a shared line

===== SCCP Configuration =====

==== EPhone-DN intercom ====
  * Program an extension as intercom that automatically call another extension
  * Remember you need a pair of DN
  * intercom <number> where <number> is the number to call when the intercom button is pressed.
<code>
ephone-dn 51
  number B5000
  intercom B4999 label <display-name>
ephone-dn 52
  number B4999
  intercom B5000 label <display-name>
</code>

==== EPhone button ====
  * Assign intercom to ephone
  * Default will auto answer in mute
<code>
ephone 6
  button 2:51
ephone 7
  button 2:52
</code>

===== SIP Configuration =====

==== Voice Register DN Auto Answer ====
  * Configure auto answer on a DN
    * For some reason I cannot use alphanumeric char on the 7971 SIP phone
  * Assign a label as intercom
<code>
voice register dn 9
  number 2000
  label <intercom>
  auto answer
</code>

==== Voice Register Pool Number ====
  * Assign DN to recipient/secretary phones
<code>
voice register pool 10
  number 2 dn 9
</code>

==== Voice Register Pool Speed Dial ====
  * Assign [[ccme-sdial|Speed Dial]] on manager's phone
  * The number can be any intercom number including SIP or SCCP
<code>
voice register pool 11
  speed dial 1 2000 label "Secretary"
</code>

  * We can also assign [[ccme-sdial|Speed Dial]] on manager's phone even if it is a SCCP phone
  * The number can be any intercom number including SIP or SCCP
<code>
ephone 12
  speed dial 1 2000 label "Secretary"
</code>

===== Whisper Intercom Configuration =====
  * Intercom call will answer even if the phone is busy

==== EPhone-DN intercom ====
  * Program an extension as intercom that automatically call another extension
  * Remember you need a pair of DN
  * whisper-intercom <number> where <number> is the number to call when the intercom button is pressed.
<code>
ephone-dn 51
  number B5000
  whisper-intercom B4999 label <display-name>
ephone-dn 52
  number B4999
  whisper-intercom B5000 label <display-name>
</code>

==== EPhone button ====
  * Assign intercom to ephone
  * Default will auto answer in mute
<code>
ephone 6
  button 2:51
ephone 7
  button 2:52
</code>

===== Other Options =====

  * barge-in - allow inbound call to force existing call to go into call hold state.
  * label - to label the intercom line
<code>
ephone-dn 1
  intercom <extension> [barge-in [no-mute] | no-auto-answer] [label <label>] [no-mute]
</code>