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VHSI Cable Construction Information
If you plan to construct your own VHSI cables, be sure to observe the guidelines
given below.
Wire Gauge, Grounding, and Pairing
• Use 28 AWG 7-strand wire with 0.020–0.028" insulation.
• The chassis must be grounded both by a drain wire and by the braid; both must
be connected to the connector case and shell at each end of the cable. The
braid must be connected through its full circumference.
• Wires identified under the heading "Twisted Pairs" must be paired. If you do
not install twisted pairs correctly, the cable will not work.
Type of Connectors
The VHSI port accepts a high density 36-pin male cable connector. The types of
connector used on the interface-specific end of the cable are as follows:
Interface
Connector
V.35
Type M
V.24
DB25
V.36/RS-449
DB37
EIA-530
DB25
X.21
DB15
Table 4: Connector Types
VHSI Port Interface Specifications
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