I am running a proprietary modem signal across Cisco VIC2-2E/M cards (with microwave for transport). 4 wire circuit.
The modem is a Motorola Astro Modem, it runs constantly. It is connected to a Motorola Quantar radio base station on one end, and a Motorola AstroTac 3000 comparator on the other. The Astro modems are constantly 'connected' to each other regardless if there is a radio signal or 'remote control' signal to transmit. When that happens, there are proprietary signalling done to determine if it is digital, analog, what channel etc.
The problem is the Astro modems keep losing the 'link'. I get constant timing errors and other errors I can't find what they are.
The delay on the circuit (this is what the Motorola equipment says) is about 98ms. That is right at the very edge of what it will function, I think 99 and it won't work. The delays isn't constant, but does change slightly from one test to another ( a couple of ms).
So it appears that there are delays in the Cisco transport. The IT person that runs the Cisco equipment says a 'ping' test shows very minimal delays (I recall something like 9ms, perhaps a bit more, but still much, much less).
Therefore I've theorized that the E&M cards are causing the delay- OR perhaps there are other settings that could minimize delays.
What settings in the E&M cards can be changed to optimize speed?