The HX Controller can support devices and network connections from a traditional telephony model (e.g., digital handsets, T1 network connections, BRI network connections) as well as pure IP (SIP trunks, IP handsets). The system provides the resources for managing the necessary translation from one environment to the other. Additionally, the 5000 CP HX Controller provides the necessary DSP resources to support services such as T.38 fax over IP and G.729 compression between IP and TDM devices.
Mitel 5000 CP HX

BESIDES ITS BUILT-IN DEVICES, THE HX CONTROLLER HAS
FOUR EXPANSION BAYS THAT SUPPORT THE FOLLOWING MODULES:
- Digital Device Module (DDM-16) provides 16 digital set ports (limited to three)
- Dual T1/E1 Module (T1M-2) provides connectivity for up to two T1/E1 spans (including PRI services)
- Single Line Module (SLM-4) provides connectivity for up to four analog devices
- Loop Start Module (LSM-4) provides connectivity for up to four analog trunk connections and includes support for calling line ID and faxing