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Cisco ASR 9000 Series configureren
Configuring Channelized SONET/SDH on the Cisco ASR 9000 Series Router
Figure 25
VTG paths are only supported on the Cisco 1-Port Channelized OC-3/STM-1 SPA and Cisco 2-Port
Note
Channelized OC-12c/DS0 SPA on the Cisco ASR 9000 Series Router.
Figure 25

Channelized SDH Overview

Synchronous Digital Hierarchy (SDH) is the international equivalent of SONET.
Channelized SDH is supported on the following SPAs:
•
•
•
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:
•
•
•
OL-26061-03
shows the VTG paths that can be configured.
SONET VTG Channelized Paths
SONET
Controller
STS 1
STS 2
STS 3
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
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)
Cisco ASR 9000 Aggregation Services Router Interfaces and Hardware Component Configuration Guide
Information About Configuring Channelized SONET/SDH
VTG 1
VTG 2
Each STS
VTG 3
can be channelized
into 7 VTGs.
VTG 4
VTG 5
VTG 6
VTG 7
. . . same configuration possibilities as STS 1
. . . same configuration possibilities as STS 1
Each VTG
can be channelized
into 4 T1s.
T1
T1
T1
T1
HC-323