Side panels, Main communications port, Multi-homebase port – Hand Held Products Dolphin 7200 User Manual
Page 54: Side panels -4, Main communications port -4 multi-homebase port -4

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Side Panels
There is a main communications port on one side and a multi-HomeBase-port on the other side:
Main Communications Port
Use a standard serial cable to connect this port to a host RS-232 device if the Dolphin HomeBase is the first unit of HomeBase
network. Otherwise, the main communications port connects to another Dolphin HomeBase Multi-HomeBase Port to form a
daisy-chained network; see
Configuration Switch Settings for a HomeBase Network
Multi-HomeBase Port
Use this port to form a Dolphin HomeBase Network. This port mates with the next HomeBase's main communications port to
form an addressable network.
Note: The Multi-HomeBase Port cannot be used for communications to standard serial devices.