Expansion Lan Switch - Motorola V186 - Cell Phone - GSM System Planner Manual

Expansion LAN Switch

The expansion Ethernet switch provides an interface from the ACE3600 CPU (on the
master RTU frame) to up to seven expansion frames, or up to 13 expansion frames when
two switches are used. This enables up to 110 I/O modules in a single RTU.
The expansion modules can be co-located with the switch (installed in the same 19"
frame or cabinet) or distributed in other locations.
The switch is installed only in the RTU's main frame, in either of
the first two I/O module slots.
The ACE3600 expansion LAN switch is configured to prioritize
different Ethernet data frame types. A special protocol, used for
communication between the expansion LAN switch and the main
CPU, quickly collects I/O information from the expansion frames
to the main CPU and adds the highest priority and special tags to
these Ethernet frames. The switch recognizes these frames and
gives them the highest priority in the buffer queue, higher than the
frames of the standard protocols (MDLC, TCP/IP) used for
communication in the ACE3600 system. For this reason, only the
ACE3600 expansion LAN switch can be used in an I/O expansion
system.
IMPORTANT: When an expansion LAN switch is used on an I/O
expansion LAN, only the main CPU and the expansion frames
(expansion modules) can be connected to the expansion switch(es).
Any attempt to connect other devices to the expansion switch(es)
may result in unpredictable communication delays between the main CPU and the
expansion frames and malfunction of the expanded RTU.
The expansion LAN switch includes eight 100BaseT Ethernet communication ports:
The expansion LAN switch can be inserted and extracted while the system is powered up.
LAN switch status and diagnostics information can be retrieved via the main CPU using
the STS Hardware Test utility. LAN switch warnings and errors are logged in the main
frame CPU memory. The RTU error logger information can be retrieved using the STS
Error Logger utility.
The expansion LAN switch option includes a 60 cm Ethernet cable (Motorola p/n
V529/FKN8561A). Use this cable to connect from the Eth1 port on the main CPU to the
Eth1 (M) port on the expansion switch. For the second switch in a system (if such
exists), use this cable to connect from the Eth2 port on first switch to the Eth1 (M) port
on the second switch.
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