15 Problem Solving
462
Problem Solving
15
IP fax (SIP)
transmission
takes long time.
A large amount of
communication data loss
occurs because the
communication rates (10M/
100M/1000M) differ on two
sides of the network relay
device (such as a switch and
router).
Use the same communication speed within
the network.
A large amount of
communication data loss
occurs because the
communication parameters
(such as input gain, output
attenuation, echo setting) of
the VoIP gateway are
inappropriate for the network
environment.
Set appropriate communication parameters
on the VoIP gateway for your environment.
IP fax (SIP) machine is
connected to the data
network where the telephone
and data networks are
operated separately.
Configure the QoS setting for the entire
network environment and control traffic. Set
[Prioritize T.38 IP Packets] for QoS of the
machine.
For more information on [Prioritize T.38 IP Packets],
refer to "Prioritize T.38 IP Packets" (P.210).
Communications
other than IP fax
(SIP) become slow
while IP fax (SIP)
transmission is
executed.
The priority of IP packet,
which is sent from the
machine, on the network
relay device (such as a switch
and router) becomes higher
than necessary because the
QoS setting of the machine is
invalid or a large amount of
buffer space is occupied.
Decrease the value for [Prioritize T.38 IP
Packets] according to your network
environment.
For more information on [Prioritize T.38 IP Packets],
refer to "Prioritize T.38 IP Packets" (P.210).
IP fax (SIP) machine is
connected to the telephone
network where the telephone
and data networks are
operated separately.
Configure QoS setting for the entire network
environment and control traffic. Set
[Prioritize T.38 IP Packets] for QoS of the
machine.
For more information on [Prioritize T.38 IP Packets],
refer to "Prioritize T.38 IP Packets" (P.210).
The image quality
is poor.
The document glass is dirty. Clean the document glass.
Refer to "Cleaning Film and Constant Velocity Transport
Glass (for Duplex Automatic Document Feeder B1-C)"
(P.91).
The fax density is
inappropriate.
Adjust the fax density.
Refer to "4 Fax" > "Fax/Internet Fax" in the User Guide.
The sender's machine has a
problem.
Confirm with the sender.
Note • Image quality may be affected by a
problem of the sender's machine, not
just by a problem of the machine.
Symptom Cause Remedy
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