HP digital sender 9200c Manuale Di Servizio

If a loopback test fails, digital sender or embedded LAN updates might be required, or the formatter
might need to be replaced.

If the digital sender fails before you open the Loopback menu item, remove the LAN

cable, perform a cold reset on the digital sender, and then perform the loopback test.

Perform a ping test to check for network connectivity.

A ping test is designed to troubleshoot TCP/IP network connectivity issues by using key parts of the
functionality from the ping utility on Microsoft Windows systems. All Jetdirect products can respond to
ping requests, but the embedded LAN can initiate ping requests. All TCP/IP implementations, such
as ICMP Echo Response, are required to respond to ping requests.

The following are the ping-test parameters:

■

Destination IP address: The IP address that you want to contact

■

Packet size: How many octets of data to send

■

Timeout: The number of seconds to wait for a response

■

Count: The number of packets to send

The following are the recommended settings for the ping test:

■

Destination IP address: Use the local router and then use the remote nodes

■

Packet size: 64 bytes and then 1,460

■

Timeout: 1 second (more time if using a WAN connection)

■

Count: 4

The following information is available from the ping test:

■

Packets Sent: The total number of ICMP packets that were sent to the remote host during the
test (or during the most recent test)

■

Packets Received: The total number of ICMP packets that were received from the remote host
during the test (or during the most recent test)

■

Percent Lost: The percentage of ICMP packets that were sent but not received from the remote
host during the test (or during the most recent test)

■

RTT Min: The minimum time (in milliseconds) from when an ICMP packet is sent until it is
returned from the remote host

■

RTT Max: The maximum time (in milliseconds) from when an ICMP packet is sent until it is
returned from the remote host

■

RTT Average: The average time (in milliseconds) from when an ICMP packet is sent until it is
returned from the remote host (total time/number of packets)

Solving network-connectivity problems 

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