Configuring Channelized SONET/SDH on the Cisco ASR 9000 Series Router
Information About Configuring Channelized SONET/SDH
HC-323
Cisco ASR 9000 Aggregation Services Router Interfaces and Hardware Component Configuration Guide
OL-26061-03
Figure 25 shows the VTG paths that can be configured.
Note VTG paths are only supported on the Cisco 1-Port Channelized OC-3/STM-1 SPA and Cisco 2-Port
Channelized OC-12c/DS0 SPA on the Cisco ASR 9000 Series Router.
Figure 25 SONET VTG Channelized Paths
Channelized SDH Overview
Synchronous Digital Hierarchy (SDH) is the international equivalent of SONET.
Channelized SDH is supported on the following SPAs:
• Cisco 1-Port Channelized OC-48/STM-16 SPA
• Cisco 1-Port Channelized OC-3/STM-1 SPA
• Cisco 2-Port Channelized OC-12/DS0 SPA
A Synchronous Transport Module (STM) signal is the Synchronous Digital Hierarchy (SDH) equivalent
of the SONET STS, but the numbers are different for each bandwidth. In this guide, the STM term refers
to both path widths and optical line rates. The paths within an STM signals are called administrative
units (AUs).
A summary of the basic terminology differences between SONET and SDH is as follows:
• SONET STS is equivalent to SDH administrative unit (AU)
• SONET VT is equivalent to SDH tributary unit (TU)
• SDH basic building blocks are STM-1 (equivalent to STS-3) and STM-0 (equivalent to STS-1)
STS 3
SONET
Controller
. . . same configuration possibilities as STS 1
STS 2
. . . same configuration possibilities as STS 1
STS 1
210877
VTG 1
VTG 2
VTG 3
VTG 4
VTG 5
VTG 6
VTG 7
T1
T1
T1
T1
Each STS
can be channelized
into 7 VTGs.
Each VTG
can be channelized
into 4 T1s.
To Next Page
Loading...
Need help?
General
