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Envoy

Envoy

ISDN Remotes have never been easier

Features & Benefits

  • Built-in Terminal Adapter and NT1
  • Bidirectional 7.5 kHz audio at 56/64 kb/s.
  • Bidirectional 15 kHz audio at 112/128 kb/s.
  • Ancillary data capability
  • 4 mic inputs (2 mic/line switchable)
  • 3 headphone outputs

The Envoy includes codec, terminal adapter, NT-1 and mixer in a lightweight, easy-to-use package.

The Envoy is compatible with most other manufacturers' G.722 codecs for a 7.5 kHz feed. Or enjoy a full 15 kHz frequency response when connected with another Comrex unit, such as the popular Nexus ISDN codec.

The Envoy contains plenty of mixing and monitoring facilities to make your ISDN remotes a breeze.

The Envoy Mixer includes

  • 4 microphone inputs on standard XLR connectors. Two of these inputs are mic/line switchable.
  • The 4th mic/line input can be routed to the main program mix... or just to the headphones for local cueing.
  • 3 headphone outputs on 1/4" phone jacks. Headphones may be set up for either a mix or split feed of local and return audio.

PLUS

  • A separate line level output on XLR can feed a PA system, recorder, etc. This output may be muted with a front panel push switch.
  • The outputs are an externally controllable mix of local program audio and studio return.
  • Program inputs may be muted with a single front panel push switch.

Other Envoy features

  • Quick-dial memory feature allows one button dialing of up to 20 pre-stored numbers, plus last number redial.
  • Specific ISDN information, including SPIDs, switch types and LDNs, may be saved for up to 10 different sites.
  • The Envoy automatically adapts to answer ISDN calls at 56, 64, 112 or 128 kb/s.

And more cool stuff

  • The Envoy includes an ancillary data channel of 4800 baud, allowing a user to pass data between two computers... great for call screening or delivering sports scores.
  • A contact closure is available on the Envoy which is automatically enable upon connection.
  • An internal peak limiter is included.

Low delay

The coding delay is only 6 milliseconds to allow free-flowing, interactive communication.

Specifications

  • Connections:
    • Audio in: 3-pin XLR female
    • Audio out: 3-pin XLR male
    • Headphone out: 1/4" stereo phone jack
    • Tel Line and Tel Set: RJ-11C 6 pin modular jack
    • Contact closure: 1/8" 2-conductor mini-jack
    • Ancillary data port: 9-pin D connector
  • Levels:
    • Audio Input:
      • Inpedance: 10K ohms
      • Mic input: -85 to -40 dBu
      • Line input: -10 to +10 dBu
    • Audio Output:
      • Max output: +12 dBu
  • Frequency Response
    • 7.5kHz at 56/64 kb/s
    • 15 kHz at 112/128 kb/s
  • Switch Protocols supported
    • For North American "U" interface: National ISDN 1, AT&T 5ESS (Point to Point or Multipoint), Northern Telecom DMS100
  • Power:
    • External Supply: 120/240 VAC 60/50 Hz
  • Size:
    • 13"W x 9"D x 3.5"H
  • Weight Portable:
    • 3.5 lbs