Cisco Systems 9001, 9001S, ASR9001, ASR9001s Sync Ports Connection Guidelines

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Cisco ASR 9001 and Cisco ASR 9001-S Routers Hardware Installation Guide
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Chapter 1 Preparing for Installation
Cisco ASR 9001 Router Port Connection Guidelines
Figure 1-25 Straight-Through Cable Pinout to a Hub, Repeater or Switch
When connecting to a router, use the crossover cable pinout shown in Figure 1-26.
Figure 1-26 Crossover Cable Pinout Between RP
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 (see 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 (see Figure 1-27). When lit, these LEDs indicate:
•in BITS mode:
– Green — Connection is alive.
– Amber — A fault has occurred.
MDI-X wiringMDI wiring
1 TxD+
2 TxD–
3 RxD+
6 RxD–
1 RxD+
2 RxD–
3 TxD+
6 TxD–
H11007
PRP
1 TxD+
2 TxD–
3 RxD+
6 RxD–
1 TxD+
2 TxD–
3 RxD+
6 RxD–
75431
PRP