Fuji Xerox ApeosPort-V C6676 Administrator's Manual page 478

15 Problem Solving
IP fax (SIP)
transmission
takes long time.
Communications
other than IP fax
(SIP) become slow
while IP fax (SIP)
transmission is
executed.
The image quality
is poor.
15
478
Symptom
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).
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.
IP fax (SIP) machine is
connected to the data
network where the telephone
and data networks are
operated separately.
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.
IP fax (SIP) machine is
connected to the telephone
network where the telephone
and data networks are
operated separately.
The document glass is dirty.
The fax density is
inappropriate.
The sender's machine has a
problem.
Cause
Use the same communication speed within
the network.
Set appropriate communication parameters
on the VoIP gateway for your environment.
Configure the QoS setting for the entire
network environment and control traffic. Set
[Prioritize IP Packets] for QoS of the machine.
For more information on [Prioritize IP Packets], refer to
"Prioritize IP Packets / Prioritize IP Packets (Ethernet 1),
Prioritize IP Packets (Ethernet 2)" (P.229).
Decrease the value for [Prioritize IP Packets]
according to your network environment.
For more information on [Prioritize IP Packets], refer to
"Prioritize IP Packets / Prioritize IP Packets (Ethernet 1),
Prioritize IP Packets (Ethernet 2)" (P.229).
Configure QoS setting for the entire network
environment and control traffic. Set
[Prioritize IP Packets] for QoS of the machine.
For more information on [Prioritize IP Packets], refer to
"Prioritize IP Packets / Prioritize IP Packets (Ethernet 1),
Prioritize IP Packets (Ethernet 2)" (P.229).
Clean the document glass.
Refer to "Cleaning the White Chute and the Constant
Velocity Transport Glass (for Duplex Automatic
Document Feeder B1-C)" (P.104) or "Cleaning White
Chute and Constant Velocity Transport Glass (for
Duplex Automatic Document Feeder B1-PC)" (P.104).
Adjust the fax density.
Refer to "4 Fax" > "Fax/Internet Fax" in the User Guide.
Confirm with the sender.
Note
Remedy
• Image quality may be affected by a
problem of the sender's machine, not
just by a problem of the machine.