Comrex DH22 Dual telephone Digital Hybrid

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  • $1,150.00

  • Brand: Comrex
  • Model Number: DH22
  • Product Code: BS17326
  • Availability: 2-3 Days
  Usually dispatched in 2-4 working days

The Comrex DH22 is a high quality dual line telephone interface that interconnects two standard telephone lines and your audio equipment, allowing you the ability to send audio to and receive audio from the connected telephone lines. The DH22 is ideal when the very best audio quality and conferencing capabilities are required in talk shows, news feeds, production, recording studios, and Internet applications.

Comrex's newest DSP technology delivers better and more reliable sound quality. The DH22 delivers the deepest and most stable hybrid null, ensuring maximum isolation between the send and caller audio. That means no echo and no "bottom of the barrel" sound.

In addition, Comrex has added selectable automatic gain control (AGC) and caller ducking. With AGC, each call will be delivered to your equipment at the same level. Caller ducking reduces the caller's audio level when the announcer speaks, providing a more "controlled" environment. Also added is a speaker amplifier so you can connect a speaker directly to the unit and monitor callers without headphones.

Technical Details
  • Mic or line input
  • Automatically accepts all worldwide voltages
  • Worldwide compliant, including FCC, CSA, CE and CTR21
  • Dry line capability (U.S. version only)
  • Balanced audio in and out

  • Connections
    • 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 line or analog extension from a PBX or dry line (no DC offset voltage)
    • Telco Set: RJ-11 connector
    • 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: 1/4″ stereo jack: 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

    • 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
      • Distortion: <0.1%

      • 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
        • Distortion: <0.1%

        • Mix-Minus
          • Caller-to-Send separation: 50 dB nominal
          • Tail time: 32 milliseconds
        • Controls
          • On/Off Buttons
          • Volume Up/Down Buttons

          • Status LEDs
            • On Status, Off Status
            • Send Audio Presence
            • Caller Audio Presence

            • Adjustments
              • Send Input Level
              • Caller Output Level
              • Auxiliary Input Level
              • Auxiliary Output Level
              • Burst Adapt Select
              • Mic/Line Select
              • Caller Boost Select
              • Momentary/Latching Select
              • Auto Answer/Disconnect Select
              • Caller Control Select (0, 6, 12, or 18 dB)
              • AGC Select
              • Auto Mix-Minus Select
              • Aux Mix Select

              • Null
                • Send-to-Caller separation: 55dB nominal
                • Tail time: 32 milliseconds
                Power & Physical
                • Power: IEC Type, Auto Adjusting 100-240VAC, 2A, 50/60Hz, 30W
                • Size: 17.125″ L x 10.125″ D x 1.75″ H (43.6 cm x 25.7 cm x 4.44 cm)
                • Weight: 6.35 lbs (2.88 kg)
                • Operating Temperature: 32-100° F (0-38° C)
                • Humidity: 0-80 percent

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