Available from IRT Electronics , MDC-3661 ASI network interface adapters take a 2048 kb/s G.703 (E1) signal and packs it as private data into a DVB compliant, 188 or 204 byte (selectable) ASI transport stream.
ASI network interface adapters feature on board switch settings that set the ASI program number to a choice of 8 settings, allowing it to pass through ASI style of circuits such IRT’s ASI Mux/DeMux and fibre modules as well as ASI statistical multiplexers.
MDC-3661 ASI network interface adapters will also simultaneously decode an appropriate ASI input into 2048 kb/s G.703 (E1).
In the absence of an ASI input, the G.703 output is AIS (Alarm Indication Signal). AIS is packed into a 188 or 204 byte (selectable) ASI transport stream in the absence of a valid G.703 input.
For the G.703 input, front panel LEDs indicate if a G.703 input is present and if it is AIS. For the ASI input, front panel LEDs indicate if the ASI is present, if the ASI is at the correct input rate, if there is a sync error, or if the program number of input signal is missing or does not match the on board switch setting.
External relay contact alarms also are available on the rear connector assembly of these ASI network adapters.
MDC-3661 ASI network interface adapters are suitable for mounting in all IRT’s standard 1RU and 3RU frames.
Features of MDC-3661 ASI network interface adapters include:
- 2 Mb/s (E1) G.703 input to ASI output
- AIS signal generated when no input is present
- ASI input to 2 Mb/s (E1) G.703 output
- Selectable ASI program number