MS-720 Network Interface Quick Start Guide
Est 1978
The MS-720 Network Interface for 2-Way Intercom is a fully integrated networked classroom amplifier and wireless microphone receiver, ideal for audio in small rooms. This amplifier provides network-based intercom, paging, and emergency notification. It is user-friendly, easy to install, and features an intuitive interface. The unit utilizes Power over Ethernet (PoE+) and supports full duplex SIP communications. When used with an Uninterruptable Power Supply (UPS), paging can still be heard during power outages and emergencies. This unit can be installed as part of the EPIC (Education & Paging Intercom Communications) System®, SAFE (Signal Alert For Education) System®, or integrated with other building systems.
Functional Summary
General Purpose I/O
- (4) Discrete Inputs
- (4) Discrete Outputs
Serial Communication
- (1) RS232 Connection
Audio
- (1) Balanced Audio In
- (1) Balanced Audio Out
- (1) Amplified Speaker Audio Out
Remote Power
- (2) 24 V Out
Power
- PoE Ethernet
Interfaces
Remote Port (RmtCtrl)
- Audio Out (Balanced)
- Audio In (Balanced)
- RS232
- 24 V DC
Wall Plate Audio (WPA) Port
- Connects to the ITC2
IO Output Port
- Output 3
- Output 4
IO Input Port
- Input 3
- Input 4
USB Port
- For service only
Reset Button
- Press and hold for 5 seconds to reboot.
- Press and hold for 10 seconds until Activity Indicator flashes green to factory reset.
- Press and hold for 15 seconds until Activity Indicator illuminates red to enter rescue mode. Alternatively, disconnect PoE power, press and hold the Reboot button while applying PoE power.
LEDs
Ready
- Red: Booting and obtaining an IP address.
- Green: Operational and connected to an Ethernet port.
Activity
- Red: An event is active.
GPIO
- Blue: Output is closed.
- Yellow: Input is closed.
- White: Both input and output are closed.
Speaker Connection
- Speaker Out
Ethernet
- PoE Ethernet
Process
- Physically install components in the room, such as speakers and/or AV Touch Wall Control.
- Confirm dongle is connected to the USB port.
- Turn the amplifier on by connecting to PoE Power.
- Start EPIC System, update the firmware, and continue the setup using the EPIC System software.
Configuration Set Up in EPIC System
Follow the instructions in the EPIC System Admin Manual - Managing Devices.
Connector Details
Remote Control (RmtCtrl) Port Wiring:
- Pin 1: +Line Level Output
- Pin 2: -Line Level Output
- Pin 3: RS232 - TXD
- Pin 4: +24 V DC
- Pin 5: GND
- Pin 6: RS232 - RXD
- Pin 7: +Line Level Input
- Pin 8: -Line Level Input
General Purpose Output (GPO) / General Purpose Input (GPI) 3 & 4 Port Wiring:
- Pin 1: GND
- Pin 2: GPO 3
- Pin 3: GPO 4
- Pin 4: +24 V DC
- Pin 5: GND
- Pin 6: Input 4 (I/O)
- Pin 7: Output 3 (I/O)
- Pin 8: Output 4 (I/O)
Wall Plate Audio (WPA) Port Wiring:
- Pin 1: +Mic
- Pin 2: -Mic
- Pin 3: I/O In #1 (Call)
- Pin 4: +24 V DC
- Pin 5: GND
- Pin 6: I/O In #2 (Emergency)
- Pin 7: I/O Out #1
- Pin 8: I/O Out #2
GPIO 3 & 4 Port Wiring:
- Pin 1: GND
- Pin 2: GPI 3
- Pin 3: GPI 4
- Pin 4: +24 V DC
- Pin 5: GND
- Pin 6: Input 4 (I/O)
- Pin 7: Output 3 (I/O)
- Pin 8: Output 4 (I/O)
Troubleshooting
SIP Not Connected
Verify that the SIP settings are correct on the device. Try pushing Settings from the Configure tab on EPIC System again. Pushing Settings from the Devices List does not push SIP settings.
No Audio
If there is no audio going through the speakers (bells, paging, intercom, teacher mic), check the audio output to see if there is any audio passing through there. This can be done by connecting a pair of wired headphones to the audio out of the MS-720 and playing audio through the MS-720. If you hear audio through the headphones, it is most likely not a problem with the MS-720, and related to the speakers or speaker wiring.
Audio Enhancement – More Effective Classrooms
