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4
Self Test Overview
.
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).
152
Ethernet Loopback Connections (Option Dependent)
• Use standard category 5 patch cords for the 10/100 Mb/s
Ethernet loopbacks. No crossover is required as this is
handled internally. These patch cords are supplied with the
instrument, Part Number J2126-65021.
• Use duplex SC optical patch cord (Tx crossed-over to Rx and
Rx crossed-over to Tx). This patch cord is supplied with the
instrument when 1 Gb/s Ethernet is fitted, Part Number
1005-1110 (850 nm) (Tyco Electronics Corp/AMP 504971-1),
or 1005-1111 (1310 nm) (Tyco Electronics Corp/AMP
492019-1).
DS1 Balanced Electrical
F
Loopback
D
E1 Balanced Electrical
Loopback
A**
C
B
Installation and Verification Manual
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
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