VIC2-2E/M E&M card and delay. Using with Motorola Astro Modem

Hello,
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?
Please help!!!!

Sorry for the delay, I got busy with other projects and have not gotten back to solving this.
I cannot get the configuration, another agency owns the system.
They way I got the delay was given by the Motorola equipment. My assumption is it is measuring the time it is taking to make the drop with its proprietary signalling.
I can't do a Ping test, since I can't access the system. Plus the only card I have access to is E&M, so of course doesn't do ping natively.
Motorola give the 100ms latency, that could be a round trip, I really don't know (Moto is notorious for withholding information.).
I hope to get back to solving this- currently we are not using the Astro modems at all, but plain old audio. This limits the functionality quite a bit, so I really would like to get the Astro Modems working.
I will try and get as much info- and hopefully I can pass along some ideas for them to modify and optimize the link for us.
Oh yes, everything is running over a microwave link.
thanks for the help.
Mark

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