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and YY741 stacking modules are supported by the switch
2 Line Display
DC power connector
The ShoreTel phone bases come in three separate sizes
90 modulation
Adtran Atlas 890 DC Redundant System 4200321L4 Switches and YY741 stacking modules areAdtran Atlas 890 DC Redundant Router 4200321L4 Description: This ATLAS 890 bundle offers a thirteen slot fully redundant DC powered Integrated Access Device (IAD) providing multiple functions including ISDN switching, 3 1 0 DACS, Frame Relay switching and videoconferencing. The Atlas 890 offers the ability to do many different tasks with it's modular chassis. The 4200321L4 can support PRI to T1, PRI to BRI, and PRI to analog conversions. The Atlas 890
