APT ­E1/T1 MULTI-CHANNEL CODEC
Reliable Multi-Channel STL for Synchronous Links

Overview

The APT MULTI-CHANNEL CODEC can transport multiple channels of audio over T1 or E1 links. In its 1U Frame, it can accommodate up to 3 slimline audio cards delivering simplex/duplex and analog/digital audio via a universal 37-way D-type connector.

Based on a rock-solid DSP-based architecture designed for round-the-clock operation, this modular unit offers hot-swappable cards for uninterrupted audio, redundant power supplies and exceptional audio quality with linear, aptX® Enhanced and many other coding schemes.

Powerful
Performance

Audemat ScriptEasy Powerful Performance

  • Multi-Channel Codec supporting up to 3 audio cards delivering simplex/duplex and analog or digital audio
  • Outstanding audio quality with low delay, cascade-resilient aptX Enhanced
  • Many other standards and optional coding options available*
  • Robust DSP-based platform for mission-critical operation
  • Redundant Power Supplies as standard, no single point of failure
  • Hot-swappable cards enable uninterrupted audio

Powerful
Control

Audemat ScriptEasy Powerful Control

  • User-configurable suite of audio, link, sync and PSU alarms
  • Single network connection for central management of the full frame
  • WorldCast Systems network management (NMS) allows control of multiple frames simultaneously
  • Support for SNMP

Powerful
Savings

Audemat ScriptEasy Powerful Savings

  • Exceptional channel density in space-saving 1RU format
  • Flexible & modular system that can scale according to your requirements
  • Dual T1/E1 line connection on a single transport module allows drop/insert applications
  • Seamless Migration from T1/E1 to IP networks with minimal investment

Features

  • Reliable DSP-based architecture
  • Enables transport of up to 12 simplex or 6 duplex channels
  • Provides broadcast-grade audio using aptX Enhanced or Linear PCM 
  • Support for a wide range of other coding and companding schemes
  • Multiple levels of redundancy and back-up
  • Enables Drop & Insert applications

 

 

 

 

Modules

APT MCU

Master Controller Module (MCU)

The MCU module controls the operation of all other modules in the system, allocating them time slots on the backplane and sending configuration information. It enables: 

  • Status Monitoring - The processor constantly polls the status of individual transport modules and makes failsafe decisions based on this status. The module also monitors the frame temperature and the power supplies of the system.
  • Hardware Alarms - The alarm port on the MCU module provides seven GPIO relay contact closures in order to indicate critical status and alarm conditions.
  • Hot-Swappable Operation - Once a Multi-Channel Frame is configured, it is able to continue to operate in the event of an MCU card failure as each card will hold its local settings. The MCU can then be “hot swapped” and will recover the current system settings from the individual modules.
  • Configuration Pre-sets - The MCU can store pre-defined configurations as pre-sets. A pre-set can also be used by the alarm system and for backup scenarios. Also, a pre-set can be loaded manually from the NMS GUI or external switch inputs

 

E1 / T1
E1 / T1

E1/T1 Transport Module

The T1/E1 module is one of the most common choices for audio transport due to the reliability and widespread availability of T1 and E1 circuits.

Key advantages include:

  • Line Redundancy - Each module comprises two T1/E1 framer devices and two line interfaces enabling line redundancy.
  • Drop & Insert  - The T1/E1 module provides a failsafe circuit that, in the event of totalfailure of the module, connects the upstream T1/E1 circuit to the downstream T1/E1 circuit, thereby preserving the integrity of the data path to any other devices on the network ring.
  • Contribution Data & Clocking - Any data received by the X.21 port is then placed onto the T1/E1 transport link. In combination with the external clock input, this module provides versatile system timing options to connect to almost any network.
E1 / T1
E1 / T1

Universal Audio Module

The slimline universal audio module for the APT E1/T1 MULTI-CHANNEL CODEC offers a 37-way D Type connection. Four physical slots on the 1U chassis allow the population of up to three payload modules (Audio or Aux) and one T1/E1 transport card.

This results in 12 simplex and 6 duplex channels. Each module offers four audio channels which can be either four encode, four decode or two encode and two decode.

Offering a high level of flexibility and channel density, the universal audio card can provide either dual stereo or quad mono channels in simplex mode. Individual channels can be enabled and disabled or routed to different destinations. For example, on a T1/E1 link, stereo A can go to the main T1/E1 link and stereo B on the secondary, the drop and insert circuit.

The E1 module is available with both RJ45 and BNC connectors.

Applications

With a modular, single-platform approach, multiple layers of redundancy and exceptional scalability and flexibility, the APT E1/T1 MULTI-CHANNEL CODEC is the perfect solution for Studio-Transmitter Links, Studio-Studio Links, Remote broadcast, backhaul and studio linking applications. 

Typical Program Disctribution Network with Redundant Encoder

 



 
user report

User report

«It’s been my experience that the audio quality of devices built by APT is unsurpassed, and the multi-channel codec is no different. It’s a real pleasure to listen to. The unit is built extremely well, and I have the utmost confidence in it.»
Doug Irwin CPBE, DRB, AMD, RF Engineer /Project Manager, iHeartMedia, Los Angeles & Technical Editor, Radio Magazine, USA 

Specifications

APT E1/T1 MULTI-CHANNEL CODEC

 

 

Universal Audio Module
Audio Inputs / OutputsAnalog and AES/EBU on 37 pin D-Type connector, delivered with XLR breakout cable
Audio ModesSimplex:  2x stereo Input or 2x stereo output, Duplex: 1x stereo Input and Output
ImpedanceDigital, 110/110 Ω transformer balanced, Analog, Hi/Lo or 600 Ω (order option)
Digital Ref InputAES, transformer balanced, Imp. 110 Ω
Digital OperationOutput FS, 32 kHz, 44.1 kHz, 48 kHz
Audio Bandwidth10Hz to 20kHz mono & stereo 
Standard Coding AlgorithmsaptX Enhanced 16 & 24 Bit, Linear PCM 16, 20 & 24 Bit, MPEG 1/2 Layer II*, ITU G.57, J41*
Coding Delaymin. 2ms on aptX Enhanced and higher depending on chosen algorithm 
Dynamic Range16 Bit  >85dB,  24 Bit  >110dB
E1/T1 Transport
T1/E1 Line Ports2x RJ45, transformer balanced / 1x RJ45 ext. BITS clock 
T1/E1 ModesDrop/Insert or Dual Line (one Clock domain)
Data PortX.21 (DCE) Data rates 64 kbps to 1984 kbps 
Payload RateE1: 31TS (1.984kbps) / T1: 24TS (1.536kbps)
Clock Source

Internal, BITS, Loop-Timing

FramingE1: ITU G.703/704 (CRC-4 MF, DF) / T1: ESF and SF/D4
Aux/GPIO Data Module
Serial Data (5 ports)5x RS232 ≤ 9.600 Baud @ 64 kbps
GPIO8 opto-coupler inputs / 8 relay contact closures 
System Controller (MCU)
Ethernet Port100BaseT for Management access 
Alarm Relays7 Relays for user defined alarms
ControlAPT NMS, SNMP, ext. preset switches (loads up to four configuration presets)
Physical specification
19” rack mount 1U, Dimensions (H/W/L)44mm x 482mm x 370mm / 1.75” x 19” x 14.5”
Payload Capacity3x Universal Audio Module OR ; 2x Universal Audio Module, 1x AUX/GPIO Module
Weight5Kg / 11lbs
Dual Power Supply

90-250 VAC / 47-60 Hz or 36-72VDC ; AC/AC, AC/DC, DC/DC (order options)

Power Consumption< 60W
Guaranteed Working Temperatures0°C - +45°C
HumidityUp to 95% relative humidity (non-condensing)

* Cost option

Order information

REFDescription
STP00032MCU System controller and NMS Software for APT Codec frame 1U (E1/T1 version only)
E1/T1 Transport Modules (4HP) 
STP00037-A0E1 multiplexer RJ45, 2 Line Ports and ext. Clock (120 Ohm), X.21Data Interface
STP00037-A2E1 multiplexer BNC, 2 Line Ports and ext. Clock (75 Ohm), NO Data Interface
STP00052-A0T1 multiplexer RJ45, 2 Line Ports and ext. Clock (120 Ohm), X.21 Data Interface
STP00052-A2T1 multiplexer BNC, 2 Line Port, ext. Clock (75 Ohm), NO Data Interface
Universal Audio Modules (4HP)
STP00040-A04Ch. Audio Card (front/rear) analog/digital, analog Imp. HI/LO (with breakout cable)
STP00040-A14Ch. Audio Card (front/rear), analog/digital, analog Imp. 600 Ω (with breakout cable)
Algorithm Options
CD00126MPEG Layer II option (per audio card)
CD00125ITU J.41/J.57 option (per audio card)
CD00127ITU J.41/J.57 and MPEG Layer II option (per audio card)
Aux//GPIO Data Module (4HP)
STP00043Auxiliary Data Card
Codec Frame
TFP0109-A0APT Codec Frame with AC/AC PSU
TFP0109-A1APT Codec Frame with DC/DC PSU
TFP0109-A2APT Codec Frame with AC/DC PSU

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Brochures

  • APT E1/T1 MULTI-CHANNEL CODEC

    Published on Jun 22, 2017

Manuals

  • APT ­E1/T1 MULTI-CHANNEL CODEC - Manual

    Published on Feb 15, 2017

Software

  • WorldNet NMS Software

    Published on Jun 8, 2016

Catalog

  • Corporate Catalog

    Published on Apr 20, 2017
  • WorldCast Systems Overview

    Published on Jun 8, 2017
  • The Essential Guide To Audio Over IP for Broadcasters

    Published on Jun 27, 2016

Press Kit

  • APT Multichannel E1/T1 Codec - Press Kit

    Published on Feb 16, 2017
  • WorldCast Systems Logo - Press Kit

    Published on Feb 16, 2017