User`s manual

EAGLE

Multi-Standard Dual-Channel Digital Audio Codec

1. EQUIPMENT DESCRIPTION

1.1. Basic design concepts

The EAGLE is a multi-format dual audio codec for ISDN lines. Offering, in a single unit, the

entire set of utilities needed to establish either two independent two-way mono audio circuits, or

one stereo, or one 20 kHz mono circuit between two remote points, with top sound quality and

ease of use. Along with each audio channel, a transparent two-way end-to-end data channel

can be enabled.

It is equipped with a full-duplex Intercom, which allows communication with both audio

channels, individually and simply, with no external operations or cables.

Its monitoring functions, also available on the front panel, make it possible to listen to all signals

generated and received with the equipment, without affecting the studio’s audio.

The equipment’s connection capabilities are also noteworthy, with the ability to connect to a U

ISDN interface (ANSI), S ISDN interface (ETSI) or through a V35 port.

Through the Automatic Startup System, the equipment’s startup mode can be programmed, so

the technician can define all communication parameters, including phone numbers. The

technician just has to select the switch corresponding to the desired configuration, and it will

automatically start up when the power is turned on, generating calls to the pre-set numbers.

1.2. Functional specifications:

• Multi-standard dual two-way digital audio codec for ISDN lines, with Intercommunication. It

can make two independent ISDN calls at 64 kbps or one at 128 kbps, using U or S interfaces

and EUROISDN or NATIONAL-1 protocols; or with the V.35 interface, it can make one digital

connection at 64 kbps, one at 128 kbps, or one at 256 kbps.

• Connection to an RS-422 multi-station network, for simultaneous control and updating of up

to 128 units.

• Independent dialing for each of the B channels.

• In the 64 kbps modes, it is possible to have separate encoding algorithms for the B

channels.

• Two LCD indicator panels (2 lines x 24 characters). Indicate status, numbers dialed,

phonebook, menu, and setup options.

• Off-hook, automatic and manual mode selection.

• Call status indicated on LCD screen (in progress, connected, in use, busy, call rejected, etc.)

• Intercom circuit, with microphone input and headphone output on front panel.

• Alphanumeric phone book with 256 entries. Configuration of audio encoding and editing

modes can be done simply and intuitively, using the equipment’s keypad.

• Configurable audio inputs and outputs: analog at the line level and/or digital in AES/EBU

format. Send, return or their sum can be selected at the outputs.

• Generation of DTMF tones, for control of remote equipment.

• Flash EPROM-type internal memory, to update your equipment with future firmware versions

with no need to open up the unit.

• Up to 30 different startup configurations can be defined, selectable through microswitches;

these will automatically be activated when the equipment is turned on.