Thanks to the extremely careful design and high-quality components, it is a new generation telephone exchange with reliable operation and extended services.

- 4 (expandable to 8) main line inputs.
- 4 analog trunk extension cards: EXCELLTEL CDX-CP1696 400CO (optional).
- Can be expanded with 8 GSM lines (CDX-CP1696 02 GSM extension module required).
- 16 (expandable to 48) extension outputs.
- Additional station expansion card: EXCELLTEL CDX-CP1696 008EXT.
- System telephones can be connected to 1-4 extensions (optional EXCELLTEL CDX-KEY and CDX-CP1696 CID cards are required).
- Compatible system phone: EXCELLTEL CDX-PH201.
- RJ11 trunk and extension connections.
- LED status display (main lines and supply voltage).
- Operating principle with spatial distribution.
- Built-in intercom adapter.
- Two doorphone outdoor units can be connected.
- The intercom takes the place of an extension station.
- Compatible doorphone outdoor units: EXCELLTEL CDX-101, CDX-102 and CDX-103.
- Normally open (NO), control contacts.
- Uninterrupted power supply can be provided from an external battery (optional).
- RJ-45 connection for computer call data processing (software optional).
- Programming from extensions 1-4, tone mode telephones.
- In the event of a power failure, switching the main line directly to extensions 1, 2, 3 and 4.
- Main line number display.
- Extension station calling number display with EXCELLTEL CDX-CP1696 CID card (optional).
- Automatic operator, selection function.
- 2 OGMs, 90 seconds with recordable message.
- Fax tone detection.
- Operator extension can be set.
- Real-time internal clock.
- Automatic or manual day/night switching.
- Programmable (1-4) digit extension numbers.
- Trunk and extension groups.
- Enable or disable main line accesses.
- Intelligent route selection function (LCR).
- Three-passenger conference call (between main line and two extensions).
- Control of outgoing calls per extension.
- Call duration limitation.
- Automatic callback when busy.
- On call.
- Music on hold (from internal or external audio source).
- Call forwarding.
- Call pickup.
- Call forwarding.
- Do not disturb feature.
- Adjustable Flash time.
- Distortion: less than 10%.
- Cross-talk attenuation: greater than 70dB.
- Transmission loss: 0.37dB.
- Ring voltage: 70VAC +/-10%, 50Hz.
- Plastic housing.
- It can be placed both horizontally and vertically.
- Supply voltage: 230VAC/50Hz.
- Operating temperature: 0°C - 45°C.
- Operating humidity: 20% - 80%.
- CE certification.