The GPZ-BS10 connects the Controlling Chassis to the Expansion Chassis by connecting to a GPZ-BS11, which is installed on each Expansion Chassis. These Expansion Interface Units allow the CPU to transmit/receive data as required to the additional chassis.The GPZ-BS10 is installed in the Expansion bay Controlling Chassis which is equipped with a CPU blade. The GPZ-BS11 is installed in the Expansion bay of the Expansion Chassis, which does not have a CPU.The Expansion cable connects the Controlling Chassis and its GPZ-BS10 interface to the second, third, and fourth GPZ-BS11 interface. Use only the CAT 5 cables provided by NEC to make the connections between the Controlling and Expansion Chassis.Product features

• For 3 or 6-Slot Base Chassis.
• Required for connection between base chassis and up to (3) 640084 or 640082 expansion chassis.
• Installs in dedicated Expansion Blade slot.
• Also provides (64) additional system resources for
• DTMF Receivers, Caller ID, and Dial Tone Detection.
• This both way trunk card is equipped to support 16 circuits. This circuit board may be software revision sensitive in some cases.