COMBIMUX DT99

COMBIMUX,
the 2 Mbps Multiplexer/Demultiplexer
with integrated Audio Codecs


General description

COMBIMUX is a universal system for the transmission of audio and data signals via 2 Mbps channels. Its 19" cabinet holds several I/O modules, e.g. encoders and/or decoders that  can be configured by jumpers and by software to operate in several ITU-T and ISO/MPEG audio coding modes. COMBIMUX does also perform the Drop & Insert functions. The equipment is configured by a PC using the COMBISOFT program that selects the coding procedure, allocates the time slots to the various audio signals and monitors the operational state.
COMBIMUX offers the shortest processing time: In J.41 mode only 3.6 milliseconds for a complete point to point transmission from the analog audio input through the 2 Mbps interfaces to the analog audio output.
COMBIMUX offers the following features:
  • Mono-directional or bi-directional transmission of audio signals and data (serial and parallel data) on 2 Mbps channels according to the following standards: ITU-T J.41, J,57, G.722, X.21 (audio and data); ISO MPEG 1 Layer II  (encoder and decoder) and Layer III (for the time being Decoder only), DAB/ADR (for the time being Encoder only), AC3.
  • Analogue and/or digital (AES/EBU) audio interfaces. The digital interfaces are equipped with sampling rate converters.
  • Transmission of IP signals over the 2 Mbps channel.
  • Automatic ISDN back up connection in case of 2 Mbps failures.
  • ASI (DVB-T) interfaces.
  • Several equipment can be cascaded (e.g. in order to increase the number of audio interfaces).
  • Drop & Insert functions.
  • E1Q modules with four E1 interfaces and integrated 240 x 240 time slot switch allow complex network structures to be realised.
  • Comfortable configuration and monitoring functions by means of laptops with user surfaces working under Windows 95, 98, 2000, NT and XP.
  • Remote configuration of  a neighbour COMBIMUX equipment via the 2 Mbps connection.
  • Remote configuration of any number of COMBIMUX equipment via IP.
  • Remote monitoring of any number of COMBIMUX equipment via SNMP.
  • The equipment is especially designed to operate in severe electromagnetic environments
  • Due to the interchangeability of the local I/O modules, the possibility to configure them by software or jumpers and to equip them with customer specified connectors, COMBIMUX satisfies the most various requirements.
  • Redundant or non redundant 230 VAC power supply. Redundant DC power supply of up to three I/O modules, non redundant DC power supply of up to six I/O modules.
  • All modules can be replaced under power.
COMBIMUX DT 99 is built into a 19" cabinet of four height units (h x w x d = 177 x 485 x 300 mm) that can be equipped with the following modules:
  • 1 CPU (central processor module): Always needed
  • 1 E1 or E1B or E1Q (2 Mbps interface module): Always needed
  • 1 or 2 (redundant) power supply units: At least one is always needed, two for redundant supply
  • The BGT cabinet offers the space for up to six local I/O modules (various interchangeable modules to be inserted according to the transmission requirements)
  • The BGTE cabinet offers the space for up to ten local I/O modules. The space for the additional I/O slots was gained by installing the two power supply units outside the BGTE cabinet, namely in an additional 19" cabinet of 4 HU, called BGTP. This cabinet has space for six power supply units that are supplying three COMBIMUX cabinets redundantly, resp. six cabinets non redundantly.


Configuration Software COMBISOFT

COMBISOFT serves the hardware configuration of COMBIMUX, to select the compression modes of the various audio signals, to allocate the time slots to the audio signals, to adjust the audio levels, to configure the alarm outputs, to monitor the operational state of the modules, etc. The program generates log files with the set-up changes (e.g. coding algorithm, time slot occupation. etc.) and state changes ( e.g. LOS, MPEG frame loss, etc.).
COMBISOFT is self-explanatory and very easy to use.
COMBIMUX can also be remotely configured and monitored via IP. It is therefore possible to remotely configure and monitor all COMBIMUX equipment of several networks from a central office.
COMBIMUX can be remotely monitored via SNMP if it is equipped with an SNMPU module.