VHSI Port Interface Specifications
10
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
