Pen Testing a PBX (Northern Telecom Meridian-1)

[mmarrero () lloydstsb-usa com]

Hello list, 

I am about to start a pentest of a PBX system. I was wondering if there are any vulnerabilities against this make and 
model of PBX. Also, does anyone know of a paper on how to appropriately conduct a pentest. I do not want to miss 
anything. 

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