Sync Port Connection Guidelines - Cisco ASR 9000 Series Manual

RSP and RP Port Connection Guidelines
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Sync Port 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.
Note Both ports must be configured to be 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 for establishing
precise frequency control at multiple network nodes, if required for your application. The RSP/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 RSP/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.
When lit, these LEDs indicate for BITS:
• Green (LINK)—Connection is alive.
• Amber (FAULT)—A fault has occurred.
When lit, these LEDs indicate for UTI:
• Green (NORMAL)—UTI is operating in normal mode.
Cisco ASR 9000 Series Aggregation Services Router Hardware Installation Guide
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Signal
Major alarm NO
Minor alarm NC
Minor alarm CM
Minor alarm NO
Preparing for Installation
Note
NO (normally open) connected to CM
(common) during a Major alarm
NC (normally closed) connected to CM
(common) when there is no Minor alarm
Common
NO (normally open) connected to CM
(common) during a Minor alarm