Alcatel-Lucent 7750 SR-a4, Installation Manual, Page: 33 / 232

7750 SR-a4 and 7750 SR-a8 Overview
7750 SR-a4 and SR-a8 Installation Guide 33
6 Mgmt Connector The 10/100/1000Base-T Ethernet Management port has an RJ-45 copper
Ethernet connector used for the initial system startup as well as system
configuration and monitoring. The management port provides a dedicated
management interface that is segregated from data traffic crossing the other
ports. Auto detection is supported. Refer to
Management Port for pinout
assignments.
LEDs See CPM-a LEDs and Connectors on page 142 for more information.
7 BITS Connector The Building Integrated Timing Supply (BITS) port on the CPM-a front
panel accesses a clock in a central office that supplies digital signal level 1
(DS1), 2.048 MHz (E1) timing references to all synchronous network
elements in that office. This port is provisioned with an RJ-45 connector.
An appropriate T1 or E1 cable must be used to connect a device to this port.
See
CPM-a LEDs and Connectors on page 142 for more information.
Note: Ensure that you use shielded cable when connecting to the BITS port.
8 SyncE/1588 Connector The SyncE/1588 port is provisioned with an RJ-45 connector. The Sync-E/
1588 port is reserved for future use.
9 Critical
Major
Minor LEDs See CPM-a LEDs and Connectors on page 142 for more information.
10 Alarms Connector The alarm interface port is a D-type 15-pin connector that supports a critical
alarm output, a major alarm output, and four alarm inputs. When the system
has a critical or major alarm, the CPU causes the alarm relay to issue the
alarm output and turn on the critical or major LED. If you push the alarm
cut off (ACO) button, the relay will be released but the LED will stay on
until the alarm is cleared. Minor alarm output to the DB-15 connector is not
supported.
11 1PPS Connector 1PPS timing output. The 1PPS port is reserved for future use.
12 ACO/LT — The Alarm Cutoff/Lamp Test button verifies the operability of LEDs.
When you press this button, all LEDs on all chassis modules should
temporarily illuminate and blink until the button is released. The ACO/LT
button tests the functionality and operability of all LEDs on the chassis and
components of the chassis. If any LED does not illuminate and blink, the
LED might not be functioning correctly.
This button also turns off all external alarm relay control bits until the next
new alarm condition.
Table 4: 7750 SR-a CPM-a Features (Continued)
Key Label/Part Sub-
category Description