Ben, allow me to correct myself. I was wrong for saying as 2.5GHZ "Line" as it's not the line, but the cards' type themselves. These cards are rated at either 2.5GHZ Transceivers or 2.5 Transponders in general, and no, they're not only WDM but also EAML, MZI, etc. types. Typically, the 2.5GHZ Transceivers and transponders are able to transmit data (light) via longer distance without dramatic bit error rate per OSNR level and with limited loss of light (LOL), LOS, LOF, etc. with the help of amplification devices of course. As much as 600km per device (not system wise).

Then there are another type which is the 10GHZ transponders and transceivers which have much stronger capabilty of transmitting data at higher rate and faster. However, these cards are only able to transmit at a lower distance (under 100km) at given specs. So basically, I was saying that Verizon is prolly using the 2.5g system with its customer. In no relation that the line's speed is 2.5gbps or 2.5ghz thinggy. Think of it more like a system's type or label and not in the definitive way.

btw, I envy you for having such bandwidth at such a good price.