We ran around in the heart of darkness with a SATCOM. Something similar to a large suitcase that weighed in at a brisk 35 keys

So, picture this: You're in relatively hostile territory and you stop in the middle of nowhere and start setting up the SATCOM. You've got this senseless looking antenna that you start aiming into the blue yonder based on compass readings. About 15 minutes has gone by and you finally get a decent signal and connect your "secure telephone" and attempt connection. Once connected you plug in this plastic cryptographic key and the whole enchilada goes dead

In sum, whatever the Army does has to be better. It may not be good, but it will be darn expensive !