7750 Sr-A8 Chassis Features - Alcatel-Lucent 7750 SR-a4 Installation Manual

7750 SR-a8 Chassis Features

7750 SR-a4 and SR-a8 Installation Guide
Slot three supports one IOM-a. IOM-a cards occupy a full chassis slot. The IOM-a performs
data forwarding from the ingress port to the egress port. There is no switch fabric for the
7750 SR-a4.
Slot four, the bottom slot, supports up to two CPM-a cards, designated as CPM A and CPM
B. In a redundant system, the CPM-a cards are installed in slots CPM A and CPM B. CPM-
a cards occupy a half of a chassis slot. In a simplex system, the CPM-a can be installed in slot
CPM A or CPM B; an impedance panel must be installed in the empty CPM-a slot.
Below slot four is a non-removable chassis filler plate.
Below the chassis filler plate, Power Supply Units are located at the bottom of the
7750 SR-a4 chassis, and are numbered PSU 1 to PSU 4, from left to right. Each PSU occupies
one-quarter of a chassis slot. Two types of PSUs are available: one for universal AC power
feeds and one for –48 VDC power feeds.
Chassis bundles for the 7750 SR-a4 include one PSU. PSUs are orderable items that are
available for AC and DC power feeds. Alcatel-Lucent recommends that the PSUs be installed
in an N+1 configuration. A PSU impedance panel must be installed in any empty PSU slot.
The right side of the chassis has one vertical slot for an air filter. The left side of the chassis
has one vertical slot for the fan tray, which pulls air through the chassis from right to left.
The 7750 SR-a8 is a 200 Gb/s full-duplex system that is designed to be installed in an EIA
19-inch (482.6 mm) rack, where the chassis occupies 7 RU.
a populated 7750 SR-a8 chassis.
The chassis can also be installed in an ETSI 600 mm wide by 300 mm deep rack. Adapter
brackets are required to accommodate the 535-mm mounting width aperture of the ETSI rack.
The 7750 SR-a8 occupies 13 ETSI RU.
The CPM-a, IOM-a, and MDA-a cards, and the PSUs and fan tray must be installed after the
chassis is mounted in the rack and grounded. All physical connections are made from the
front of the chassis, including the chassis ground point. There are no connectors on the back
of the chassis.
7750 SR-a4 and 7750 SR-a8 Overview
Table 3 describes the features of the 7750 SR-a8 chassis.
Figure 3 shows the front view of
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