Setting; Phase Phase; Phase Selection Selection; Settings - 3One data 7304 User Manual

Local main timing (S5.1=ON, S5.2=ON): the sending timing is of local crystal OSC, and
the received data, after buffering, is synchronized with local timing.
5.3.2 5.3.2 Phase Phase selection selection
5.3.2 5.3.2 Phase Phase selection selection
S5.4 is used for the receiving phase selection of V.35 interface.
5.3.3 5.3.3

Settings

Settings

Settings of of of of loopback

loopback loopback
5.3.3 5.3.3 Settings loopback test
S5.5～S5.8 of coded switch S5 are used for setting the loopback test and pseudo-random
code test.
S5.5 is local loopback control （LLOOP） and optic interface is directly looped back to
V.35 interface. "OFF" indicates normal operation; "ON" indicates local loopback test.
The default is "OFF". It is used for testing whether local device is in normal operation.
S5.6: local digital loopback control (DLOOP). "OFF" indicates normal operation; "ON"
indicates local digital loopback. The default is "OFF". With a loopback from local V.35
interface to E1 optic interface, it is used for testing whether the remote device and E1
optic line are in normal operation.
S5.7:"OFF"indicates normal operation ； "ON"indicates command remote loopback. The
default is "OFF". As this command must be sent through E1 optic line to remote end for
validness, it will become invalid at the following two cases: ① the remote end is not
V.35 Fiber Modem device; ② V.35 Fiber Modem is working at a non-framing status, at
this moment all time slots of E1 are used for transmitting the data from V.35 interface at
a rate of 2048Kbps. Through a transmission of loopback command from local device to
remote device, the command remote loopback is achieved.
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S5.8: Pseudo-random code test control (PATT). "OFF" indicates normal operation; "ON"
indicates pseudo-random sequence test. The default is "OFF". It generates a
pseudo-random sequence code to be transmitted to V.35 optic line output terminal and
tests whether V.35 optic line input signal is in compliance with this sequence standard,
so as to judge whether the device and line transmission have an error code.
test test and and pseudo-random pseudo-random
test and and pseudo-random pseudo-random code
V.3 5 Fiber Modem V3 5
Local Loopback
Local Local Local Loopback Loopback Loopback Schematic
V.3 5
Fiber Modem V3 5
Local Local Digital Digital
Local Local Digital Digital Loopback
Fiber Modem V3 5
Local
Remote Remote Remote Loopback Remote
code code test test
code test test
Optical
Interface
Schematic
Schematic Schematic
Optical
Interface
Loopback Loopback
Loopback
Fiber Modem V3 5
Fiber Link
R e m o te
Loopback Loopback Loopback
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MODEL7304 User Manual
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