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Loopback Connections Required for Self Test
Installation and Verification Manual
The Self Test loopbacks required for each test are listed below.
Those required are dependent on the test selected. See diagram
on page 152 indicating loopback connections for a J2127A with
options 102, 111 and 32x. The table indicates the minimum test
loopback requirements.
Optical Loopback Connections (Option Dependent)
Use optical cables P/N 1005-0337 and 15 dB attenuator P/N
1005-0433.
• Connect 10 Gb/s 1550 nm Optical Out <=> 15 dB Attenuator
<=> 10Gb/s Optical In. (Note attenuator is not required for
Option 120/121 interfaces.)
• Connect 52 Mb/s - 2.5 Gb/s Optical Out <=> 15 dB Attenuator
<=> 2.5 Gb/s Optical In.
• If Option 102, Dual Wavelength is installed, connect the other
52 Mb/s - 2.5 Gb/s Optical Out <=> 15 dB Attenuator <=>
52 Mb/s - 622 Mb/s Optical In.
Unbal Electrical Connections 52 - 155 Mb/s, DS3/2-140 Mb/s
Use BNC cable P/N 15525A for each loopback.
• Connect 52 - 155 Mb/s Out (BNC) <=> 52 - 155 Mb/s In (BNC).
• Connect 2 - 140 Mb/s DS3 Out (BNC) <=> 2 - 140 Mb/s DS3 In
(BNC).
Balanced Electrical Connections 2M/DS1
Use 3-pin Siemens cable P/N 15512A and Bantam cable P/N
15670A.
• Connect 2M Out (3-pin Siemens) <=> 2M In.
• Connect DS1 Out <=> DS1 In.
DCC Loopback Connector (Only required if DCC ADD/DROP
TEST or All tests are selected.)
• Connect DCC loopback plug to 9-pin DCC port P/N
J2125-65011.
Self Test Overview
151
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