Xerox Phaser 6128 MFP, Руководство по обслуживанию

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Phaser 6128MFP Service Manual 4-55
General Troubleshooting
simultaneously accommodates analog (voice) and digital information on the
same line. Downstream data rates are offered from 512 Kbps to about 6
Mbps.
• SDSL (Symmetric Digital Subscriber Line) – Runs over one pair of copper wires
with symmetrical upstream and downstream transmission speeds up to 3
Mbps, with a maximum range up to 3 km.
• VDSL (Very high Bit Rate Digital Subscriber Line) – An xDSL technology that
provides faster data transmission over a single twisted pair of copper wires.
VDSL transmits data from 13 Mbps ~ 55 Mbps range over short distances,
usually between 1000 and 4500 feet.
Noise
If electronic equipment (television, computer, microwave, etc.) or devices equipped
with motors are located near a Fax, noise from the electronic equipment may
degrade the line condition.
Also, a telephone line, acting as an antenna, may absorb electric waves generated
from wireless or broadcasting equipment.
Because Fax data is audio data, the line quality affects the quality/stability of
image data as well as that of conversation.
Fax Failure After Installation/Relocation
The Fax has failed to send after installation. The following troubleshooting
procedure applies to this error.
Initial Actions
• Disconnect all devices other than the Fax machine.
• Cycle printer power.
• If the problem persists, follow the procedure below.
The conventional analog telephone line uses standard RJ-11 cable, which has two
conductors. However, the four-conductor cables commonly available are backward
compatible with RJ-11 and can be used with no problems. On the other hand, since
these four-conductor cables are also used for ISDN systems, the number of
elements is not the key for identification of the type of line/service.
PSTN PBX
s6128mfp-092