Datasheet
40G Cabling Technical Q&A Document
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In many existing DC environments LC-MTP cables are used to support high density fiber trunks
between switches, rack patch panels and main distribution cabling panels (MDA) as shown below:
An example cable diagram from Corning is shown below for an MTP12-4xLC harness assembly
with a set of part numbers in the table below.
Corning Part Number
Description
H757908QPH-KB010F
8-fiber harness; MTP (F) to (4) LC uniboot; Type-B polarity; OM4 and
50/125; 24-in. LC breakout and overall length of 10 ft
H757908QPH-KB020F
8-fiber harness; MTP (F) to (4) LC uniboot; Type-B polarity; OM4 and
50/125; 24-in. LC breakout and overall length of 20 ft
H757908QPH-KB030F
8-fiber harness; MTP (F) to (4) LC uniboot; Type-B polarity; OM4 and
50/125; 24-in. LC breakout and overall length of 30 ft
The application for the above MTP-LC harness cable is to directly connect a QSFP+ port to (4)
SFP+ ports. For most Data Center applications, the use of structured cabling is employed via MTP-
MTP trunks and the use of patch panels. For more detailed guidance on the applicable harness
configuration and part number needed, please refer to the following document for more detailed
information:
http://csmedia.corning.com/CableSystems//Resource_Documents/application_engineering_notes_rl
/AEN152.pdf
Rx1
Rx2
Rx3
Rx4
x
x
x
x
Tx4
Tx3
Tx2
Tx1
QSFP
Accepts+
Key+Up
8
7
6
4
3
2
1
RX
TX
RX
TX
RX
TX
RX
TX
5
1
12
Key
/Up
1
12
SFP 1
SFP 2
SFP 3
SFP 4