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DCC Loopback
connector
G
10/100M
Ethernet
H
Loopbacks
Thick line represents Loopback Patch Cords. The connections shown are
typical for J2127A fitted with Options 102 (Dual 2.5G Tx Wavelength), 111
(1550nm High Sensitivity 10G Rx optics) and 32x (Ethernet testing).
NO TE
CAU TI O N
Installation and Verification Manual
DS1 Balanced Electrical
F
Loopback
D
If only a single wavelength optical port is fitted for 2.5 Gb/s - 52 Mb/s
Optical Out (e.g.Option 100/101), then the Self Test should be performed
twice to verify all the Optical In ports. Perform the test with the
2.5 Gb/s - 52 Mb/s Optical Out port connected to the 2.5 Gb/s Optical In
port and repeat with the 2.5 Gb/s - 52 Mb/s Optical Out port connected to
the 662 - 52 Mb/s Optical In port. Select the cable configuration from the
test menu as appropriate.
Safety precautions care and connection cleanliness must be observed
to ensure that the optical connections are not damaged or degraded.
Ensure the recommended optical attenuation is present in all optical
loopback connections as failure to do so could cause self test failure or
damage to the optical receivers.
E1 Balanced Electrical
Loopback
A**
C
B
Performance Tests
E
1Gb/s Ethernet
Loopbacks
J
15dB Optical Attenuators
to ensure level is within
the Receiver Input Range
Note A** - for Option 120
or 121 10 Gb/s interface
ONLY no attenuation is
required
3
71
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