Meridian Link/Customer Controlled Routing, Installation And Upgrade Manual

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Chapter 4: Meridian Link/CCR hardware 83
Meridian Link Release 5C/CCR Release 3C Installation and Upgrade Guide
Input/output panel
Three versions of the I/O panel are currently used with the Application
Module. Many existing installations have application-specific I/O
subpanels, as shown in Figure 27. Some installations have a universal I/O
panel, as shown in Figure 28. All new installations have a generic I/O panel,
shown in Figure 29.
The I/O subpanel has nine connectors: J1 through J6 are 25-pin (DB25)
connectors; J7 through J9 are 9-pin (DB9) connectors. The removable I/O
subpanel is connected to the Application Module by cables from transition
cards in the Application Module. All connectors on the I/O subpanel are
shielded from RF.
The universal I/O panel has 20 connectors, as shown in Figure 28. The
Serial I/O (labeled from 1 through 32), Spare, Host, and ESDI Link ports
are 25-pin (DB25) connectors; the Ethernet port is a coaxial cable
connector; and the INT MODEM, SDI LINK, EXT MODEM, and SYS
CONS ports are 9-pin (DB9) connectors. All connectors on the universal
I/O panel are filtered.
The generic I/O panel (Figure 29) is similar to the universal I/O panel but
all connectors, except one, are labeled by card and connector. For example,
the connectors in the top row are labeled (from left to right) card 5 conn 3
through card 2 conn 3. The exception to this labeling convention is a 15-pin
connector labeled Ethernet.