Powervault MD circular console cable

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http://serverfault.com – We have two Powervault MD SAS devices, the specific model eludes me as these are remote and not accessible to me and anyone on-site doesn't have the capability to locate a service tag/serial or model number. I was able to get some pictures in which I see the maintenance console port is some kind of circular serial port for some unknown console cable. Google searching, perusing a variety of Power vault MD manuals, has not been helpful. I'm hoping someone out there is familiar with these older serial console cables and can tell me a name/standard or link to an example. Any/all help in some dire (HowTos)