Telecor Port Expansion Units (PEU's) are used for connecting all Central Office lines and station equipment. The PEU-200 serves as the second and subsequent Port Expansion Units in each Telecor VS1 business telephone system. The first eight ports can be configured as either Central Office ports (loop start) or stations. The remaining eight ports can be configured as stations only. The PEU-200 includes a 26-pin port for daisy chaining additional PEU's, a 2" cable and rack and wall mounting brackets.