Introduction - If you have any usage issues, please Google them yourself
SCM------ Wǔ input unit call system 1. 1 to 5 with 5 wards switch analog input call signal, the highest priority No. 1 1 to 5 followed by lower priority 2. LED display with a number of call signals not signal call is shown 0 has multiple signal call, display the highest priority call number (other call number display with lights) 3. Where a call issued by 5 seconds of the call sound 4. Low priority call on the store, processed high-priority call, then low-priority call handling (additional).