The (specifically the 1131/1 or 1131/2 models) is one of the most reliable and widely installed traditional analog intercom handsets, particularly in older residential apartment buildings, houses, and office complexes. Known for its simple design, electronic call tone, and robust build, this handset is a popular choice for replacing broken, older units, or upgrading audio entry systems.
| Symptom | Possible Cause | Action | |---------|----------------|--------| | No BUS LED | Power missing | Check L1/L2 voltage (24-30V DC) | | Cannot enter programming | Wrong code / phone type | Use analog phone; reset to default (see manual) | | Forwarding number not dialed | Line seizure fails | Check PSTN line tone; add prefix *03 for dial tone delay | | Relay does not trigger | DTMF not recognized | Ensure phone sends long tone; check DTMF sensitivity setting | | Call forwarded too quickly | Ring timeout too short | Increase *02 value |
For full technical documentation, you can search for the or view professional data sheets at Intercoms R Us .
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Urmet 1131 Wiring Instructions | PDF - Scribd
According to typical Urmet technical documentation, the 4+n system with the 1131 handset generally follows this connection logic: Description Microphone connection 2 Common Ground 3 Earphone connection 4 Door Lock button CA Electronic call wire urmet 1131 manual full
If you need help identifying your , troubleshooting a specific humming noise , or mapping an unlisted older model , let me know. Please tell me the brand name of your current system or describe how many wires come out of your wall . Share public link
Carefully remove the old handset. Label each wire with its terminal number (e.g., if a wire is on terminal 1 on the old unit, mark it "1").
Ensure the power to the intercom system is disconnected at the main building breaker if possible, or exercise caution if working with low voltage.
The unit typically consists of a metal enclosure with a hinged or removable cover, housing a transformer and a rectifier/regulator circuit board. The (specifically the 1131/1 or 1131/2 models) is
1.0 (Compiled for User Reference) Applicable Models: Urmet 1131 Series (Including variants 1131/0, 1131/1, 1131/2)
Separate the handset cover from the base by gently pushing the plastic clip at the bottom using a flat-head screwdriver.
Electronic call wire (receives signal from the main entrance panel).
Switch off the power supply to the intercom system to prevent shorts. This public link is valid for 7 days
The Urmet 1131 is an analog handset designed for traditional . It uses a dedicated wire for each primary function plus individual call lines for each apartment. Key Features
The output terminals provide the DC voltage for the system devices.
For full diagrams and technical catalogs, you can access these official and distributor sources: Urmet 1131 Wiring Instructions | PDF - Scribd