Addressing Computers In A Cascade - ADDER AdderView Matrix User Manual

Addressing computers in a cascade

The addressing format used by the switches incorporates the various group
numbers along with a final specific port number to which a required computer is
attached. In the diagram given here, a portion of the previous cascade diagram
indicates how the routes to particular computers are formed and addressed.
21 23 27 02 21 04
U se r U se r
1 2
AdderView Matrix
Port 04 at
AdderView Matrix
cascade level 2
The unique address
of this computer is:
21 04
The unique address
of this computer is:
21 23 27 02
Group 21
at cascade
level 1
23
Group
at cascade
level 2
AdderView Matrix
27
Group
at cascade
level 3
AdderView Matrix
Port 02
at cascade
level 4
Each cascade level requires two digits, hence the computer marked in red
requires a unique address with eight digits because it is at cascade level 4,
compared to the blue computer at level 2 with its four digit unique address. A
computer connected directly to the AdderView Matrix at the top level would
simply have a two digit port number.
The group at level 2 is numbered 23 because it is a group of two, connected to
ports 5 and 6 on the AdderView Matrix. If it was connected to ports 7 and 8,
then the group number would be 24.
If the group at level 3 was connected to ports 15 and 16 of the switch, then the
group number would be 28. This would make the address of the red computer:
21 23 28 02.
To connect switches in a cascade arrangement
Note: This procedure may be carried out in any order but for clarity this instruction
will begin at the higher level switch (here called the upper switch), i.e. the one that is
being fed into by a switch at the cascade level below (here called the lower switch).
The procedure given here remains the same regardless of exactly which cascade
levels are being connected. The basic rule is that each link is made by connecting a
computer port of the upper switch to a user port of the lower switch.
1 Ensure that power is disconnected from the AdderView Matrix and all other
switches to be connected.
2 For each link, use a standard Adder KVM cable set (Part number: VKVM-
xM where x is the cable length in metres: 1, 2, 5 or 10) - use the shortest
possible lengths.
3 Connect the plugs at one end of the KVM cable set to the keyboard, video
and mouse sockets of an appropriate Computer port on the rear panel of
the upper switch. Refer to the Group numbering diagram
link group boundaries.
for the correct
continued
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