​Telos Xstream ISDN Codec

* G.722, G.711 and MPEG Layer-3 and Layer-2 coding for compatibility MPEG-2 AAC coding for CD-quality audio
* MPEG-4 AAC-LD coding for high audio quality with low delay
* 100Base-T Ethernet port allows remote control and streaming of AAC or MP3-coded audio over a LAN, WAN or the Internet (TCP/IP network connectivity also include web browser remote control and easy upgrade of system software via FTP)
* Livewire input/output support for easy one-connector-integration into Axia local audio networks
* Analog and AES/EBU inputs and outputs with independent sample rate converters
* Front-panel headphone jack with level control
* Auto-configuring 90-240 volt power supply
* Optional V.35/X.21 interface available
* All Telos products include a 5 year warranty


ZEPHYR XSTREAM GENERAL SPECIFICATIONS

Full duplex, high-fidelity ISDN transceiver using MPEG-2 AAC, MPEG-4 AAC-LD, ISO/MPEG Layer 3, ISO/MPEG Layer 2, and G.722, fully compliant with international standards. Stereo or mono transmit configurations, both with stereo receive.

Frequency Response
20 - 20kHz @ 48kHz fs (+0/-1dB, swept sine tone procedure)

THD+N
Far loopback (end-to-end), 48kHz fs, analog I/O, input at 1kHz +20dBu, .004%

Dynamic Range
A Weighting, AAC, Layer 3 or 2 end-to-end: 101dB typical

SOFTWARE UPGRADES
Downloadable from Telos; uses FTP over 10Base-T Ethernet connection.


ZEPHYR XSTREAM ISDN TRANSMISSION MODES

Stereo and Dual-Mono Modes Using Two ISDN “B” channels:
* MPEG-2 AAC Joint Stereo @ 20kHz or 15kHz for maximum fidelity.
* MPEG-2 AAC independent Stereo @ 20kHz or 15kHz.
* MPEG-4 AAC-LD Joint Stereo @ 14kHz for high quality with low delay
* MPEG-4 AAC-LD Independent Stereo @ 14kHz for high quality with low delay
* Layer 3 Joint Stereo @ 16 kHz or 15kHz for high fidelity and compatibility.
* Layer 3 Independent Stereo @ 16kHz or 15kHz for compatibility and surround-sound transmission.
* Layer 3 Indepenedent Dual-Mono allows each “B” channel to independently transmit and receive 15.8kHz.
* Layer 2 Joint Stereo @ 20kHz or 15kHz.
* Layer 2 Independent Stereo @ 7.8 or 9.8kHz.
* G.722 Mono-Dual allows each “B” channel to independently transmit and receive 7kHz. Stereo Modes Using One ISDN “B” channel:
* MPEG-2 AAC Stereo 64 @ 7kHz or 10kHz.

Mono Modes Using One ISDN “B” channel:
* MPEG-2 AAC @ 20kHz or 15kHz for maximum fidelity.
* MPEG-4 AAC-LD @ 15.8kHz for high quality with low delay
* Layer 3 @ 20kHz or 15kHz for high fidelity and compatibility.
* Layer 2 @ 7.8kHz or 9.8kHz.
* Layer 2 Mono@ 8.6kHz (24kHz fs).
* G.722 @ 7kHz.

ISDN Telephone Mode:
* G.711 is used to call a standard POTS telephone for low-grade voice communications at 300Hz - 3.4kHz.

LINE BIT RATES
56 or 64kbps per channel, front panel selectable.

LIMITER
Zephyr Xstream:
Soft clipper prevents A/D converter overload without loss of dynamic range.
Zephyr Xstream MX and MXP only:
Internal DSP-based AGC/limiter with Omnia* audio processing. Includes presets for music & voice, selectable per channel.

SEND INPUT
Active balanced with RF protection.
Zephyr Xstream:
LINE: -12 to +4dBu nominal level.
Clip point: 18dB above chosen nominal.
Bridging: < 10K ohms (x2)
XLR female/quarter-inch TRS combo connector.
Zephyr Xstream MX and MXP:
XLR female/quarter-inch TRS combo connector.
LINE/MIC: -12, +4/-55, -35dBu nominal level.
Clip point: 16dB above chosen nominal.
Bridging: < 10K ohms (x2)

RECEIVE OUTPUT
XLR male, active differential
Level: Front panel selectable for -10 or +4dBu, nominal.
Impedance: 33 ohms (x2)

AES/EBU DIGITAL I/O (Zephyr Xstream only)
Sample rates supported: 32, 44.1 and 48kHz
Rate conversion: Input and output independently selectable. Can be bypassed.
Input clock: From external source or Zephyr telco clock.
Output clock: From sample frequency, external source, or AES/EBU input.

MULTIPLEX/DEMULTIPLEX
Internal channel splitting/combining of two network channels for stereo modes.
MPEG-2 AAC: Telos Zephyr protocol.
Layer 3: FHG/Telos Zephyr protocol.
Layer 2: CCS CDQ* protocol compatible.

OPTIONAL V.35/X.21 DIRECT DIGITAL INTERFACE
Two ports, both V.35/X.21. Automatically selected when the appropriate cable is connected.

ISDN INTERFACE
Compatible with National ISDN, AT&T 5ESS, Northern Telecom DMS-100, Siemens EWSD, INS 64(Japan) and EURO-ISDN. Compatibility and approval pending in some countries; contact Telos for current status. Supports “S” (4-wire) & “U” (2-wire) ISDN interfaces.

LAN INTERFACE
10Base-T Ethernet port using RJ-45 connector. Supports TCP/IP (HTTP, Telnet and FTP).

ISDN VOICE TELEPHONE MODE
2 channels using G.711 standard, μLaw or A-Law. 300–3,400Hz. DTMF provided (CCITT standard). ISDN Modem Mode supports single Xport POTS
connection.

REMOTE CONTROL AND ANCILLARY DATA
RS-232 9-pin D-Sub female (DCE): Asynchronous; 8 data, no parity, 1/2 stop, 2400-57,600 bps. 10Base-T Ethernet port using RJ-45-style connector. Bi-directional ancillary data: Serial connection at 9600bps; eight contact closures.

CONTROL PORTS
Eight bi-directional inputs/outputs for end-to-end contact closure emulation. Inputs: Closure to ground; integral pull-up to 5 volts. External pull-ups can be used to support higher voltages. Outputs: Open collector, sinks up to 125mA to ground.

RESOLUTION
Send Input: MPEG, 24 bits; G.722, 16 bits
Receive Output: MPEG, 24 bits; G.722, 16 bits

POWER SUPPLY
90-240 VAC (50/60 Hz) auto-configuring.
100 watts peak
CE approved

DIMENSIONS, ZEPHYR XSTREAM AND ZEPHYR XSTREAM MX
19" (48cm) standard rackmount front panel
17 1/8" (43cm) wide behind front panel
12 1/2" (32cm) deep
3 1/2" (9cm) high

DIMENSIONS, ZEPHYR XSTREAM MXP
18 1/4" (46cm) wide
14" (36cm) deep
4 1/4" (11cm) high

SHIPPING WEIGHT
17 pounds (7.7kg)