- Simplex/Full Duplex/Asymmetric Serial Data to Single Pair of Fibers
- Asymmetric Serial Data with separate EIA530/HSSI to Single Pair of Fibers
- Multiple HSSI Over Single Pair Of Fibers
- Multiple HSSI Over Single Fiber
What we are doing in the first application is simply the job of a Fiber Optic Modem [FOM]. The Metrodata AP3000 can be used therefore as a serial to fiber converter. An example of EIA530 Serial Over a Fiber Optic Link is shown in the Diagram below. The "OC-3 Fiber" reference is nothing to do with the speed of the link, it is simply in reference to the AP Module that we would use [All our Fiber Modules are OC-3].
In the second application we are providing slightly more functionality by providing the ability to support 2 separate serial interfaces, operating at different rates. This is particularly useful in medium data rate asymmetric satellite applications. Where you might have a HSSI satellite modem operating at 29.123Mbits and an EIA530 Modem operating at 187.321Kbits. You cannot use an EIA530 Modem in both directions as EIA530 has a maximum speed of 20Mbits [and this link is running at 29.123Mbits]. It is not cost effective to use a pair of HSSI Modems, as they are much more expensive than 1 x EIA530 Modem and 1 x HSSI Modem.
In the third application we are using the Access Processor almost as an HSSI Aggregation Switch. The maximum data rate we support on HSSI is 90Mbits. Generally speaking, the only equipment that runs HSSI at such rates is a Satellite Modem. Typically the maximum rate of most other HSSI devices is STS-1 or 51.84Mbits.
In the fourth application we are looking at much the same functionality as the previous app. The ability to transport Tx and Rx on the same fiber is provided by using a WDM Modification to our existing STM-1 Single Mode Fiber Module.