The NEC BE110274 is the IP4WW-1228ME-B expansion cabinet designed for the NEC SL1100 business telephone system. This unit extends the capacity of the main SL1100 chassis, providing additional card slots for increased port density and system scalability. The designation ‘w/o C’ indicates this expansion cabinet is supplied without a CPU or main processor, as it operates as a slave unit connected to the primary SL1100 cabinet.
The SL1100 platform is a hybrid IP/digital PBX system designed for small to medium-sized businesses requiring flexible telecommunications infrastructure. This expansion cabinet allows organisations to grow their telephone system beyond the base unit’s capacity, supporting additional digital stations, analogue extensions, and trunk interfaces as business needs evolve.
The NEC SL1100 series has been a well-established platform in the SMB telephony market, though it is now considered a legacy system as NEC has transitioned to newer unified communications platforms. This expansion cabinet remains relevant for existing SL1100 installations requiring capacity upgrades or replacement hardware.
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