WMHS-III
Industrial Telephone with Handset
Line-powered steel wall phone for noisy cement, steel and power plants
Line powered24–56 V DCIP 65
HT-IHotline System with Normal Phones
Ring-down hotline for up to 4 desk phones on one pair
4 phonesSingle pair220 V ACBattery backup
Ask an engineer about HT-I on WhatsApp →
- Category
- Hotline Systems
- Environment
- Indoor
- Interface
- Stand-alone
Ideal for
- Control room to field hotlines
- Industrial plants
- Desk-to-desk direct lines
What it does
A direct line between the control room and the posts that matter, with no dialling. Lift any of up to four desktop phones and the others ring until someone answers. All four share a single pair of wires to one SMART controller, which has built-in battery backup and can sit anywhere on the line.
- 01
Up to 4 desktop phones on a single pair of wires
- 02
Lift to ring: others ring until answered, then talk privately
- 03
Auto disconnect if the caller hangs up first
- 04
Controller can sit at any point on the line
- 05
Built-in continuous online UPS battery backup
Specifications
Electrical · 2
| Power supply | 220 V AC (controller) |
|---|---|
| Battery backup | Built-in, continuous online UPS |
Connectivity · 2
| Phones | Up to 4 normal desktop phones |
|---|---|
| Cable | Single pair wire |
Compare with similar models
Differences first: interface, power, protection and output, then installation. Full specifications are in each model's table.
| Specification | HT-I Hotline System with Normal Phones | HT-A Hotline PA Telephone System | HT-IP Fibre-Optic Hotline Telephone System |
|---|---|---|---|
| Interfacediffers | Stand-alone | Stand-alone | Fibre |
| Power supplydiffers | 220 V AC (controller) | 220 / 110 V AC (controller and each hotline PA telephone) | 230 V AC |
| Cablediffers | Single pair wire | Single pair (2-core telephone cable) to controller; long loop up to 1 km of 2-core 0.5 sq mm | Not specified |
| Battery backupdiffers | Built-in, continuous online UPS | Online built-in | Not specified |
| Phonesdiffers | Up to 4 normal desktop phones | Two desktop hotline PA telephones | Not specified |
| Environment | Indoor | Indoor | Indoor |
Part of a system
Hotline network
Direct lines with no dialling, from control rooms to the posts that need an answer now. Three SMART hotlines cover one pair of copper, PA paging on pick-up, and single-mode fibre between sites.
Downloads
PDFSMART HT-I datasheet131 KBQuestions
What happens in a power failure?
The controller has built-in continuous online UPS battery backup.
Related models
All hotline systems →Need HT-I for a project?
Tell us the quantity, the plant and the timeline. We reply with a quotation.