Edwards 4-AUDTELS — the EST4 audio and telephone interface/riser module, mounting to the back of the 4-CPU main processor.
This is the card that gives an EST4 panel its voice and firefighter telephone paths. It processes the microphone and telephone units mounted beside the CPU and is the source of the telephone riser that supports remote handsets.
- 85 mA standby and 101 mA alarm at 24 VDC; ground fault impedance 5 kΩ
- Telephone riser Class A or Class B; five active telephones plus the master handset, or six without it
- Riser line impedance 52 Ω and 0.2 µF maximum; 15 kΩ end of line (EOL-15) on Class B
- Four audio inputs or outputs at 1 VRMS, each programmed with the 4-CU utility
- Wiring 22 to 12 AWG twisted shielded pair; 32 to 120 °F, 0 to 93% RH
- UL, ULC, FM, CSFM and NYC Fire Dept.
It is an interface card, not a complete audio system: it mounts on a 4-CPU, and the 4-MIC paging microphone and 4-FT master handset are ordered separately. 4-AUDTELS-E is the EN54 version and 4-ANNAUDTEL the equivalent for a 4-ANNCPU annunciator.
Documents
FAQ
Where does the 4-AUDTELS mount?
It mounts to the back of the 4-CPU main processor and processes the microphone or telephone units mounted directly to the right of the CPU.
What does it provide?
Audio input and output, and the source for a telephone riser that supports remote firefighter handsets and warden stations.
How many remote telephones can be active?
Five active telephones plus the master handset, or six without it, on a Class A or Class B riser.
Is there a version for annunciators?
Yes. The 4-ANNAUDTEL interface module mounts to a 4-ANNCPU annunciator CPU.
