====== CCME ======
===== General =====
  * Either H.323 or SIP can be used as a trunking protocol to interconnect Unified CM and Unified CME.
  * Software
    * Cisco IOS 12.4-11XW6 or above for CUCME 4.2
    * IP Voice Feature Set

===== Scalability =====

^  **Platform**  ^  **Max Phones**  ^  **Max DN**  ^  **Flash/RAM**  ^  **License**     ^
|  2801          |  24              |  120         |  64/256         |  FL-CCME-SMALL   |
|  2811          |  36              |  144         |  64/256         |  FL-CCME-36      |
|  2821          |  48              |  144         |  64/256         |  FL-CCME-MEDIUM  |
|  2851          |  96              |  288         |  64/256         |  FL-CCME-96      |
|  3725,3745     |  144             |  500         |  64/256         |  FL-CCME-144     |
|  3825          |  168             |  500         |  64/256         |  FL-CCME-168     |
|  3845          |  240             |  720         |  64/256         |  FL-CCME-240     |

===== IOS Version =====

^  **IOS Version**  ^  **CUCME Version**  ^
|  12.4(9)T         |  4.0                 |
|  12.4(11)T        |  4.0(2)              |
|  12.4(4)XC        |  4.0(3)              |
|  12.4(11)XJ       |  4.1                 |
|  12.4(15)T        |  4.1                 |
|  12.4(11)XW1      |  4.2                 |
|  12.4(15)XY       |  4.3                 |

===== Features =====
^ **Features** ^  **CUCME 4.2**  ^  **CUCME 4.1**  ^  **CUCME 4.0(1)**  ^  **CUCME 3.3**  ^
| Extension Mobility |  ✔  |  |  |  |
| Media Security |  ✔  |  |  |  |
| Presence with BLF status |  ✔  |  ✔  |  |  |
| Video |  ✔  |  ✔  |  ✔  |  |
| Phone Security |  ✔  |  ✔  |  ✔  |  |
| Local MOH |  ✔  |  ✔  |  ✔  |  ✔  |
| SIP phone support |  ✔  |  ✔  |  ✔  |  |
| SCCP phone support |  ✔  |  ✔  |  ✔  |  ✔  |