I/O and Cabling Considerations
3.3.2 Extension Cables
Two basic types of extension cables of various lengths are available as shown in Figure 3-11.
Both types have 50-pin Telco (male) connectors at one end and either a 50-pin Telco (female)
connector, or a 50-pin bottom-entry connector (male or female) at the other end. (Refer to
paragraph 3.3.10 for a DECconnect-style extension cable.)
I/O Card
TELCO (50-Pin)
Male Connector
TELCO (50-Pin)
Male Connector
TELCO (50-Pin)
Female Connector
Bottom-Entry
50-Pin Male or
Female Connector
STANDARD
OPTIONAL
111
Figure 3-11. Extension Cables.
The available lengths for each type are:
Telco Male to Telco Female Telco Male to Bottom-Entry Female/Male
0.91 m (3') 3.05 m (10') to bottom-entry female
3.05 m (10') 7.62 m (25') to bottom-entry female
7.62 m (25') 7.62 m (25') to bottom-entry male
15.24 m (50')
Either the Telco male to Telco female or the Telco male to bottom-entry male can connect
directly to the I/O module. These extensions cables provide a straight through connection so
combinations of various male-to-female cable lengths can be connected together to give you the
length you require.
These extension cables can be used to or from the I/O module to the following cabling options:
• Octopus Cables
• Distribution Panel
• Modular Splitter
• Punch-Down Block
• Extend existing cable
0021 3-33
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