Carrier Access BROADway System 770-0125-AB - Manual (Page 27)

BROADway - Release 4.00 2-11
Installation
Cabling the Alarm Ports
Cabling the Clock Ports on the ITU Chassis
On the front panel of the chassis are two pairs of synchronization clock ports: CKIN-1 and CKOUT-1,
and CKIN-2 and CKOUT-2 (one pair is redundant for the other). CKIN-1 and CKOUT-1 are
connected to NSP-1, and CKIN-2 and
CKOUT-2 are connected to NSP-2.
Connect the CKOUT ports to provide the timing signal to a further piece of communications
equipment. The CKIN-1, CKOUT-1, CKIN-2, and CKOUT-2 ports are 75ohm BNC connectors.
Cabling the Alarm Ports
The ALARMS port supports four alarm contact connections: two inputs and two outputs. These
contacts can be used to provide additional external alarms (audible and visual) when an alarm occurs
on the BROADway system as well as to collect alarms arriving from external sources.
The ALARMS port is a female, DB15 connector.
The ALARMS port provides two alarm sense inputs, and two alarm generation outputs.
! Alarm sense #1 and #2 (alarm inputs)—These are used to collect alarms coming from an
external source, such as other equipment, high water sensor, fire alarms, and so forth.
CKOUT-2
CKIN-2
NIP TX1 NIP TX2 TX2 TX1 TX3 CKOUT-1 TX4
NIP RX1 NIP RX2 RX3 RX1 RX2 RX4 CKIN-1
ALARMS ACO SCP-2
ETH-1 ETH-2 SCP-1
Connect a clock source
Connect a second clock source
CKIN-1
NIP TX1 NIP TX2 TX2 TX1 TX3 TX4
NIP RX1 NIP RX2 RX3 RX1 RX2 RX4
ALARMS ACO SCP-2
ETH-1 CKIN-2 ETH-2 SCP-1