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Specifications
Release 3.3 59
Mitel Networks™ 3300 R2 NSU Components
Front panel
• RS-232 serial port (DB9 connector to a PC) for maintenance purposes such as field
installation, database upgrade, access to logs, and modem connection for remote access
• Ethernet port (RJ-45 connector) for future use
• Faceplate LEDs - Miscellaneous, Link Status, and Message Link Controlled
• FIM port for fiber connection to the 3300 Controller
• Two CIM ports
• Reset pin.
Rear panel
• DIP switch up (1) position for FIM connection; down (2) for CIM connection
• Two E1 ports (RJ-45 connectors) for network connection
• Two hybrid port status LEDs
• Two hybrid port DIP switch complexes
• Power connector
• Protective ground to ground the chassis.
3300 R2 NSU Protocols
R2 is a protocol converter that allows the 3300 R2 NSU to access an R2 National Public
Switched Telephone Network (PSTN) using MF-R2 digital trunk signaling. The 3300 Controller
also receives and processes Calling Line Identification (CLI) and allows the information to be
displayed on the user's telephone display screen.
The 3300 R2 NSU supports the CCITT Blue Book, Volume VI, Fascicle VI.4, Specifications of
Signaling System R2, Recommendations Q.440 to Q.490 (with the exception of Echo
Suppression (Q.479), Test Calls (Q.490) and international signals).
The 3300 R2 NSU converts the following:
• Incoming MF-R2 signals from the PSTN into Digital Private Network Signaling System
(DPNSS) signals for the system
• Outgoing DPNSS signals from the system into MF-R2 signals for the PSTN.