Home of RF and Wireless Vendors and Resources

One Stop For Your RF and Wireless Need

SONET vs SDH


Following are the useful links related to SONER and SDH technologies:
• DWDM system basics   • Fibre optic communication   • Types of WDM   • PDH versus SDH   • SONET versus SDH   • What is PDMA?   • What is WDM?  


SONET vs SDH provide similarities and difference between SONET and SDH technologies,data rates,number of voice channels supported for various designations(OC,STM).

Both SONET and SDH is information transmission techniques over fibre optic cable. The both does following functions.
• Frame the information to be transmitted over fibre using HDLC standard frame format.
• Provides error checking functionalities.
• Take care of link management functionalities.

SONET was developed in US through ANSI T1X1.5 committee,while SDH was developed by ITU.

SONET stands for Synchronous Optical Network while SDH stands for Synchronous Digital Hierarchy. SONET is basically a subset of SDH.

The basic unit of SDH is synchronous transmission module level-1(STM-1). The basic unit of SONET is Optical Carrier level-1(OC-1). The other rates OC-3,OC-12,OC-18,OC-24,OC-36,OC-48,OC-96 and OC-192 are derived from this basic rate.


North American Digital Telephone System

Following are the rates supported in North American digital telephone system.


Designation Data Rate(MBPS) Number of voice channels
DS-1 1.544 24
DS-2 6.312 96
DS-3 44.736 672
DS-4 274.176 4032

SONET

Following are the rates supported in SONET system.


Designation Data Rate(MBPS) Number of voice channels
OC-1 51.84 672
OC-3 155.52 2016
OC-12 622.08 8064
OC-18 933.12 12,096
OC-24 1244.16 16,128
OC-36 1866.24 24,192
OC-48 2488.32 32,256
OC-96 4976.64 64,512
OC-192 9953.28 129,024

SDH

Following are the rates supported in SDH system.


Designation Data Rate(MBPS) Number of voice channels
STM-1 155.52 2016
STM-4 622.08 8064
STM-16 2488.32 32,256
STM-64 9953.28 129,024

In SONET and SDH, OC-192 level supports maximum data rate of about 9953.28Mbps, but with recent dvelopments in SDH data rate upto 40Gbps can also be achieved.

What is Difference between

PDH vs SDH
SONET versus SDH
CAS vs CCS
FDMA Vs. TDMA Vs. CDMA
difference between FDM and OFDM
Difference between SC-FDMA and OFDM
Difference between TDD and FDD
Difference between 802.11 standards viz.11-a,11-b,11-g and 11-n
FDM vs TDM

RF and Wireless Terminologies


Share this page

Translate this page