Carrier Access 770-0125-AB installation manual Cabling the Network Synchronization Port

Installation

Cabling the Network Synchronization Port

Cabling the Network Synchronization Port

There are two chassis types, BITS and ITU; the difference is in the number and type of network synchronization ports. The network synchronization ports (CKIN-1and CKIN-2) can be connected to an external synchronization source that is typically traceable to a Stratum 1 level primary reference source. In the U.S. and Canada the BITS chassis expects to see a D4 or ESF framed T1 signal at this input. In countries that utilize an E1 network hierarchy, the ITU chassis expects to see a ITU-T G.703 2.048 MHz square wave signal. These connections are optional and should only be used when external timing is required. If a single external input only is available, it should always be connected to CKIN-1rather than CKIN-2. For more information about network synchronization, refer to Timing and Synchronization in the online help.

Cabling the Clock Ports on the BITS Chassis

On the front panel of the redundant for the other).

chassis are two synchronization clock ports: CKIN-1and CKIN-2(one is CKIN-1connects to NSP-1, and CKIN-2connects to NSP-2.

Connect a second clock source

Connect a clock source

NIP RX1	NIP RX2	RX1	RX2	RX3	RX4	CKIN-1 CKIN-2	ETH-1	ETH-2	SCP-1
NIP TX1	NIP TX2	TX1	TX2	TX3	TX4		ALARMS	ACO	SCP-2

The CKIN-1and CKIN-2ports are female, RJ45 connectors. For pinout information on CKIN-1and CKIN-2, see CKIN-1 and CKIN-2 Connector Pinouts (BITS Only) on page A-4.

2-10 BROADway - Release 4.00