Gentner DH20 Communication Telephone Interface

The DH20 is a high quality single-line and dual-line telephone interface, designed to interconnect 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 and DH22 are ideal when the very best audio quality is required for talk shows, news feeds, production, recording studios, and internet applications.

Features:

• Crystal clear, consistent audio quality
• Continual adaptation to telephone line conditions
• Selectable automatic mix-minus and caller automatic gain control (AGC)
• 1W power amp with volume control on front-panel
• Selectable mic/line level input
• On/Off control via front panel and rear panel remote connection
• Analog receive filter for telephone line noise reduction
• Selectable caller control (ducking)
• Balanced inputs and outputs
• Auxiliary output for recording
• Simple installation and operation
• Adjustable send/caller audio level control
• Selectable single-ring auto-answer and auto-disconnect

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 30V DC 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
• 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 inches
  • 43.6 x 25.7 x 4.44 cm
• Weight:
  • 6.35 lbs./2.88 kg (dry)
  • 10.95 lbs./4.97 kg (shipping)