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Appendix
33
P 64 Digital Audio Matrix
Owner’s manual
Check Network Configuration of PC:
Check the network configuration of the used PC. Remember that the network part of the used IP
addresses that is used and the subnet mask of the PC and the P 64 have to be identical.
Ruling Out Duplicate IP-Adresses:
It is possible that the same IP address is allocated twice if there are more devices in an Ethernet
network and if the IP addresses are allocated manually. Switch off the P 64 and try to ping the IP
address of the off-state P 64 via a command line prompt (see page 30 of this manual). If the ping
is successful, another device has the address of the off-state P 64. In this case, change the IP
address of the device which is now answering or of the P 64 with the duplicate address (then you
also have to change the IP address of the P 64 in IRIS-Net).
Check Physical Connectivity Problems:
When the PC and the P 64 are connected physically via the Ethernet, the following points have to
be checked:
• Is the network cable undamaged and plugged in correctly?
• Is - if necessary - a crossover cable used?
• Do the indicator lights of the network socket of the PC, the P 64 and (if available) of the net-
work devices between the PC and the P 64 glow after the network cable(s) has/have been
plugged in?
• Is a problem indicated on the used network interface in the system control devices of the
operating system?
Connect directly:
Establish a direct connection between the PC and the P 64 via a crossover cable in order to rule
out internal problems in the network devices between the PC and the P 64. If an IP address had
been set up automatically (DHCP) via a network device which is now no longer connected, this
address has to be set up manually again.
5.3 Ethernet principles
The P 64 matrix manager can be connected to an Ethernet network via the Ethernet interface
(RJ-45) on the rear panel. Ethernet is a computer networking technology for local networks. It is
possible to connect two devices (hosts) directly via a crossed Ethernet cable (crossover cable) if
this is necessary. If more than two devices have to be connected, they have to be connected via
normal Ethernet cables (straight through cables) and a central node (hub or switch). For this
purpose the central hub or switch has an extension (port) for every network member. The
Ethernet interface of the P 64 is compatible with the following Ethernet standards:
• 10Base-T (IEEE 802.3i): Four wires (two twisted pairs) of CAT-3 or CAT-5 cables are used
for this connection. The transfer rate is 10 MBit/s and the maximal length of a segment is
100 meters.