====== CCME Call Transfer ======
  * blind
    * Transfer without consultation using Cisco Proprietary method
    * Default in CUCME 4.0 or earlier
  * full-blind
    * Transfer without consultation based on the industrial standard H.450.2
  * full-consult
    * Transfer with consultation based on the H.450.2 standard and a second line is available
    * Calls fall back to full-blind if the second line is unavailable. 
    * This is the default in Cisco Unified CME 4.0 and later versions.
    * Transfer-system needs to be set at full-consult for the "transfer by directory" to work.
  * local-consult
    * local call is consult and 
    * non-local call is blind

===== Configuration =====

==== Transfer Mode (Optional) ====
  * System wide setting
  * Full consult is the default
<code>
telephony-service
  transfer-system {blind | full-blind | full-consult | local-consult}
</code>

  * Line setting overwrite the system on an individual phone
  * Full consult or full blind based on H.450 standard
  * Cannot use the Cisco proprietary method on the line
<code>
ephone-dn 1
  transfer-mode {blind | consult}
</code>

===== Transfer Pattern =====
  * Allows transfer of telephone calls from Cisco IP Phone to other phones e.g. PSTN.
  * The blind setting here can overwrite the system wide setting
<code>
telephony-service
  transfer-pattern 2095559... [blind]
</code>

==== Transfer to SIP ====
By default, call transfer to non-local number is blocked e.g. PSTN. However, this also includes SIP number so we need to include the SIP number in the transfer pattern
<code>
telephony-service
  transfer-pattern 73..
</code>

===== Recall =====
  * For a blind transfer, if the call is not answered after a certain time, the call will be recalled back to the party originating the transfer.
  * If the originating party is busy, it will make two attempt before dropping the call
  * Default recall time is 0s = off. We are not doing a call transfer recall
  * System wide setting
<code>
telephony-service
  timeouts transfer-recall <secs>
  no timeouts transfer-recall
</code>

  * EPhone DN setting overwrite system wide setting
<code>
ephone-dn 1
  timeouts transfer-recall <secs>
  no timeouts transfer-recall
</code>

===== Transfer VMail =====
  * Press the TrnsfVM button, enter the mailbox number to transfer the call to the voice mail box.
  * Configure the softkey template and add to ephone
  * Add pattern to allow transfer to VMail number as it is not an ephone number
<code>
ephone-template 1
  softkeys connected [Park] [Hold] [Transfer] [TrnsfVM] [Confrn] [ConfrnList] [RmLstC]
!
ephone 1
  ephone-template 1
!
telephony-service
  transfer-pattern 19.. blind
</code>