DH22

About the DH22 Digital Hybrid

Are you looking for the very best, most affordable dual digital telephone hybrid available? You just found it. The DH22 Dual Digital Hybrid incorporates the latest in DSP technology to provide you with the best sound and
easiest installation.

The 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.

Our 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, we've 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. We've also added a speaker amplifier so you can connect a speaker directly to the unit and monitor callers without headphones.

Features & Benefits

• The world's best, most affordable dual digital hybrid
• Two digital hybrids in one chassis
• 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 auto mix-minus
• Selectable AGC
• Selectable caller ducking
• Selectable auto-answer/auto-disconnect
• Remote control and status
• Automatically accepts all worldwide voltages
• Worldwide compliant, including FCC, CSA, CE and CTR21
• Dry line capability

Specifications

Specifications subject to change

Caller 1 and 2 Outputs: XLR male
0dBu nominal, adjustable, balanced, 50 Ohm impedance

Aux Output: XLR male
0dBu nominal, adjustable, balanced, 50 Ohm impedance

Telco 1 and 2 Lines: R-J11 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 1 and 2 Sets: 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, ±1 dB
Signal to noise ratio: >56 dB
Distortion: <0.2%

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%

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: Hybrid 1 and 2 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, -55/0dBu nominal,
adjustable, balanced, bridging, 20k Ohm impedance

Mix-Minus
Caller-to-Send separation: 50dB nominal
Tail time: 32 milliseconds

Operating Temperature
32-100°F/0-38°C

Humidity
0-80 percent

Controls
Hybrid 1 and 2 On/Off Buttons
Volume Up/Down Buttons
On Status, Off Status
Hybrid 1 and 2 Send Audio Presence
Hybrid 1 and 2 Caller Audio Presence

Adjustments
Send Input Level
Caller 1 abd 2 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 18dB)
AGC Select
Caller 1 Mix Select
Auto Mix-Minus Select
Aux Mix Select

Power: IEC Type
Auto Adjusting 100-240VAC, 2A, 50/60Hz, 30W

Null
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
6.4 lb/2.9 kg (dry)
11.3lb/5.13 kg (shipping)

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