Cisco ASR 903 Guide

Clocking
▀ Configuration for BGP PIC & RFC3107 (with ISIS)
▄ Cisco ASR 903 Router Design and Deployment Guide
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OL-30526-01
Chapter 11 Clocking
ASR903 supports both Sync-E and Precision Time Protocol 1588v2. Here is the front panel of ASR903 RSP. BITS
and 10MHz inputs can be used as external clocking sources. 1PPS and ToD can be used for 1588 PTP.
Figure 27. Cisco ASR903-RSP
Table 3. Framing Modes for BITS Port on a Cisco ASR 903 Series Router
BITS or SSU Port Support Matrix
Framing Modes Supported
SSM or QL Support
Tx Port
Rx Port
T1
T1 ESF
Yes
Yes
Yes
T1
T1 SF
No
Yes
Yes
E1
E1 CRC4
Yes
Yes
Yes
E1
E1 FAS
No
Yes
Yes
2048 kHz
2048 kHz
No
Yes
Yes

Cisco ASR 903 Specifications

General

Brand	Cisco
Model	ASR 903
Category	Network Router
Language	English