Cisco Systems ASR 9001-S manual Sync Ports Connection Guidelines, Sync Port LED Indicators

Chapter 1 Preparing for Installation

Cisco ASR 9001 Router Port Connection Guidelines

Sync Ports Connection Guidelines

The SYNC 0 and SYNC 1 ports are timing synchronization ports. They can be configured as Building Integrated Timing Supply (BITS) ports or J.211 ports (Figure 1-23).

Note Both ports must be configured to be in the same mode. It is not possible to use external BITS and J.211 sources at the same time.

When configured as BITS ports, they provide connections for an external synchronization source. Such connections are for establishing precise frequency control at multiple network nodes, if required for your application. The RP card contains a synchronous equipment timing source (SETS) that can receive a frequency reference from an external BITS timing interface or from a clock signal recovered from any incoming Gigabit Ethernet or 10-Gigabit Ethernet interface. The RP SETS circuit filters the received timing signal and uses it to drive outgoing Ethernet interfaces.

The BITS input can be T1, E1 or 64K 4/. The BITS output can be T1, E1 or 6.312M 5/.

When configured as J.211 ports, they can be used as Universal Timing Interface (UTI) ports to synchronize timing across multiple routers by connecting to an external timing source.

SYNC Port LED Indicators

The SYNC port connector has integral LED indicators (Figure 1-27). When lit, these LEDs indicate:

•in BITS mode:

–Green — Connection is alive.

–Amber — A fault has occurred.

•in J.211 mode:

–Green — DTI is operating in normal mode.

–Amber — DTI is operating in fast mode.

Figure 1-27 SYNC Port Connector

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Cisco ASR 9001 and Cisco ASR 9001-S Routers Hardware Installation Guide

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