7750 SR-a Modules
32 7750 SR-a4 and SR-a8 Installation Guide
The internal and external CF cards are field-replaceable; see Replacing the Internal Compact
Flash Card on the CPM-a on page 195.
Figure 5 shows the CPM-a faceplate. Table 4 describes the CPM-a features. See CPM-a
LEDs and Connectors on page 142 for identification and description of the faceplate features.
Figure 5: 7750 SR-a CPM-a Features
Alarms
1PPS
ACO/LT
Critical
Lnk
DTE
Pwr
7750 CPM-a
Stat
Console
Mgmt OES
SyncE/1588
BITS
Compact Flash
DCE
Act Lnk Act
Major Minor
24539
1 3 11 13 15 7 9
2 4 126 8 10
Table 4: 7750 SR-a CPM-a Features
Key Label/Part Sub-
category
Description
1 Captive
screws
— Secures the CPM-a in place.
2 Pwr / Stat LED See CPM-a LEDs and Connectors on page 142 for more information.
3 DTE — Set the switch to DTE when connecting to the serial port of a PC with a
null modem cable. When the switch is set to DTE, the Console port acts
as a data terminal equipment (DTE) serial port.
DCE — Set the switch to DCE when connecting to the serial port of a PC with a
straight-through cable. When the switch is set to DCE, the Console port
acts as a data communications equipment (DCE) serial port.
4 Console Connector The Console port uses an RJ-45 connector that enables a connection to a
terminal for performing switch monitoring and configuration operations.
The terminal may be a PC or workstation that is running terminal emulation
software (DCE), or a terminal configured as a Data Terminal Equipment
(DTE) connection. A null-modem wired serial cable is supplied with the
router for connecting to this interface.
5 OES Connector RJ-45 Optical Extension Shelf (OES) Ethernet port. The OES Ethernet port
is reserved for future use.
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