The DH20 is a high quality single line telephone interface that interconnects a standard telephone line and your audio equipment, allowing you the ability to send audio to and receive audio from a connected telephone line. The DH20 is ideal when the very best audio quality is required for talk shows, news feeds, production, recording studios, and internet applications.
Features
- DSP digital technology ensures the very best audio quality and the deepest, most reliable hybrid null
- Easy to install, simple to operate
- Built-in speaker amplifier
- Balanced audio in and out
- Mic or line input
- Selectable AGC ensures every caller is at the same audio level
- Selectable caller ducking
- Selectable auto-answer/auto-disconnect compatible with most telephone central offices including loop current interruption and busy/reorder tones
- Remote control and status
- Automatically accepts all worldwide voltages
- Worldwide compliant, including FCC, CSA, CE and CTR21
- Dry line capability
Specifications
| Caller Output: XLR male | 0dBu nominal, adjustable, balanced, 50 Ohm impedance |
| Aux Output: XLR male | 0dBu nominal, adjustable, balanced, 50 Ohm impedance |
| Telco Line: RJ-11 connector | POTS (plain old telephone service) line or analog extension from a PBX or dry line (no DC offset voltage).
A-Lead supervision provided |
| Telco Set: RJ-11 connector | A-Lead supervision provided |
| Telephone Transmit | Nominal send input of 0 dBu referenced to -15 dBu onto the telephone line. |
| Frequency Response: | 250 Hz to 3.5 kHz, +/-1dB |
| Signal to noise ratio: | >56 dB |
| Distortion: | <0.2%25 |
| Telephone Receive | Nominal telephone line level of -15 dBu referenced to caller output of 0 dBu |
| Frequency Response: | 250 Hz to 3.5 kHz, +/-1 dB |
| Signal to noise ratio: | >56 dB |
| Distortion: | <0.2%25 |
| Remote: | DB-25 Female |
| Remote Send Input: | 0dBu nominal, adjustable,
unbalanced, 20k Ohm impedance |
| Remote Caller and Aux Output: | 0dBu nominal, adjustable,
unbalanced, 50 Ohm impedance |
| Control Inputs: | Remotely activate any of the following functions with a switch closure to ground: On, Off, and Monitor Mute
Status Outputs: Remotely check the status of the hybrid using the On and Off status outputs. Status outputs are open collector outputs rated at 30VDC and 40mA maximum |
| Monitor Output: | Tip=+phase, Ring=ground,
Sleeve=ground, 1W output into an 8 Ohm load |
| Send Input: XLR female | Mic/Line selectable, -55/0 dBu nominal,
adjustable, balanced, bridging,
20k Ohm impedance |
| Mix-Minus | |
| Caller-to-Send separation: | 50 dB nominal |
| Tail time: | 32 milliseconds |
| Operating Temperature | 32-100Deg F/0-38Deg C |
| Humidity | 0-80 percent |
| Controls | On/Off Buttons
Volume Up/Down Buttons |
| Status LEDS | On Status, Off Status
Send Audio Presence
Caller Audio Presence |
| Power: IEC Type | Auto Adjusting 100-240VAC, 2A, 50/60Hz, 30W. Power cable not included. |
| Send-to-Caller separation: | 55dB nominal |
| Tail time: | 32 milliseconds |
| Dimensions (LxDxH) | 17.125 x 10.125 x 1.75 43.6 x 25.7 x 4.44 cm |
| Weight | 6.35 lb/2.88 kg (dry)
10.95 lb/4.97 kg (shipping) |
