Chapter 2 Description
Figure
The PSM slots are numbered 1 through 16 (from left to right) on the bottom of the card cage. Slot 1:
•Reserved for common equipment purposes (the IMC card).
•Divided into two slots (A and B) for the IMC card. These slots are wired in parallel.
•Provides:
–Ethernet connectivity for remaining 15 slots.
–BITS A and B connections for the user.
–Alarm relay connections for the user.
Slots 2 through 16:
•Are identical with respect to the PSM cards and Interface I/O
•Are wired for Ethernet connections and have
•Are coupled to both BITS A and B.
•Contain alarms relay control signals for four contact closures.
The
•Eliminates most of the discrete wiring within the shelf.
•Provides connection between the front and back cards.
•Provides the interconnection for the cards, interface I/O panels, fan tray, and
•Supports hot swapping of cards, Interface I/Os, and fan tray.
•Has no active circuitry.
I/O Panels are installed in the rear of the chassis. Two types of I/O cards exist:
1.The PSM I/O, with two OC3 transceivers, three DS3 ports, and an RJ45 CRAFT port.
2.The IMC I/O card, with 1 Ethernet port, 1 RJ45 console port, and BITS A and BITS B ports, and a D connector for alarms.
A blank I/O panel is supplied to cover slots that do not contain one of the above cards.
Cisco MGX 8240 Hardware User’s Guide
Release 3.0, Part Number
