Note: The model number 1131 is most commonly associated with the Urmet 1131/21, a high-resolution analog dome camera often used in CCTV security systems. This article is tailored to that device.
Jumpers: The unit may contain internal jumpers to switch between "Buzzer" and "Electronic Call" modes. For a standard 1131 electronic setup, these are usually set to positions 2-3. Troubleshooting Common Faults
rather than stranded cable for more reliable terminal connections. Intercoms R Us Documentation & Resources
System Compatibility: Designed for 4+N wire systems (5 audio wires). Note that it utilizes an electronic call tone and is generally not compatible with older AC buzzer systems. Installation Steps:
- Lower the microphone sensitivity (VR3) slightly.
- Ensure the handset is not too close to a speaker (acoustic feedback loop).
- The manual suggests a specific wiring twist (1 turn per meter) to cancel induced noise from power lines.
Urmet 1131 Manual Full [work]
Note: The model number 1131 is most commonly associated with the Urmet 1131/21, a high-resolution analog dome camera often used in CCTV security systems. This article is tailored to that device.
Jumpers: The unit may contain internal jumpers to switch between "Buzzer" and "Electronic Call" modes. For a standard 1131 electronic setup, these are usually set to positions 2-3. Troubleshooting Common Faults
rather than stranded cable for more reliable terminal connections. Intercoms R Us Documentation & Resources
System Compatibility: Designed for 4+N wire systems (5 audio wires). Note that it utilizes an electronic call tone and is generally not compatible with older AC buzzer systems. Installation Steps:
- Lower the microphone sensitivity (VR3) slightly.
- Ensure the handset is not too close to a speaker (acoustic feedback loop).
- The manual suggests a specific wiring twist (1 turn per meter) to cancel induced noise from power lines.
