Specifications
Chapter 20 - Troubleshooting General Operation Issues
178
Mediatrix 4100
DESCRIPTION: I changed the IP address of my unit, but I can’t reach the DHCP server anymore.
POSSIBLE CAUSE: A subnet mask is used to determine to which subnet an IP address belongs. An IP
address has two components, the network address and the host address. For example, let’s consider
the IP address 192.168.0.1. Assuming this is part of a Class B network, the first two numbers (192.168)
represent the Class B network address, and the second two numbers (0.1) identify a particular host on
this network.
Let’s say you have the following information:
• Mediatrix 4100 IP address: 192.168.0.1
• Subnet Mask: 255.255.0.0 (Class B)
• DHCP Server IP address: 192.168.0.20
If you happen to change the Mediatrix 4100 IP address to 192.169.0.1, for instance, the subnet mask
is still valid, but cannot reach your DHCP server anymore. Refer to subnet mask documentation for
more details.
DESCRIPTION: Unable to reach the Mediatrix 4100 after changing the Ethernet speed at run-time.
POSSIBLE CAUSE: Some hubs cannot adapt completely their port speed at run-time.
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OLUTION: Always restart the Mediatrix 4100 for the new setting to take effect. See “Ethernet
Connection Speed” on page 59 for more details.
DESCRIPTION: Setting the MIB variable voiceIfAdaptativeJitterBufferEnable to disable has no effect.
POSSIBLE CAUSE: You cannot disable the adaptative jitter buffer on the Mediatrix 4100.
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OLUTION: If you set the voiceIfTargetJitterBufferLength and voiceIfMaxJitterBufferLength variables to
the same value, you will have a non-adaptative jitter buffer. See “Adaptative Jitter Buffer” on page 142
for more details.
DESCRIPTION: When I set values such as the User Name and Display Name, the value is not accepted and is
reset to its default value once the Mediatrix 4100 restarts.
POSSIBLE CAUSE: When you enter values that contain non-standard English characters in entries that
accept strings of characters, this invalidates the value and resets it to its default value. However, this
may be visible only once the Mediatrix 4100 restarts.