Telos Xstream MXP ISDN Codec

Zephyr XSTREAM MXP, Portable ISDN Codec (2001-00080)BSW PART: XSTREAMMXP

The Telos Zephyr Xstream MXP (model 9502) is a portable transceiver specially designed for use with a single ISDN line or other low-bitrate transmission paths. It combines the newest Xstream features with the utility of a digital four-channel stereo mixer, all in a rugged, road-ready portable chassis. Two-channel flexibility over a single ISDN circuit or two synchronous links can be used to transmit and receive 20 kHz stereo audio to and from a single location, or two mono channels to and from separate locations. Four headphone outputs and two XLR outputs are fed by two different local mixes - monitor send or receive audio, or both.

Features:

* Digital stereo mixer with four mic/line switchable inputs (main mixer stage feeds codec directly)

* Two local mixes (Mix 1/Mix 2) with selectable source controls for monitoring local and/or return audio

* Mix 1 output to front panel 1/4" headphone output with volume control

* Mix 2 output to three rear panel 1/4" headphone outs with independent volume controls and 2 XLR jacks

* Selectable AGC/limiter processing presets by Omnia

* Built-in 48-volt phantom power for two mic inputs

* G.722, G.711 and MPEG Layer-3 and Layer-2 coding for compatibility

* MPEG4 AAC coding for CD-quality audio

* MPEG 4 AAC-LD coding for high audio quality with low delay

* All Telos products include a 5 year warranty

* 10Base-T Ethernet port allows remote control and streaming of MP3-coded audio over a LAN, WAN or the Internet

TCP/IP network connectivity. Studio rackmount versions are available.

Note: Audio codec systems require two units for operation.

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)

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