SONET is an alternative to SDH and makes use of the STS (51.84Mbit/s) transport module. SONET rates are generated as multiples of the STS rate and are often known by the corresponding Optical Carrier (OC) designation.
There is correlation between different SDH and SONET rates which allow interfacing between the two similar technologies. (eg. STM-1/OC-3 = 155Mbit/s, STM-16/OC-48 = 2.5Gbit/s, etc)
For both SDH and SONET the higher data rates are achieved using fibre optic cable as the physical medium.
Regulatory Testing
As an example, the table below lists the necessary regulatory requirements to gain market access to Europe and the US for SDH products.
| European Requirements | US Requirements | |
|---|---|---|
| EMC | EN 55022, EN 55024 | CISPR22, CISPR24 |
| Telecoms | - | TIA-968-A |
| Safety | IEC 60950-1 | UL950-1 |
Contact TRaC to discuss the regulatory requirements of the market you are looking to access.
Conformance Testing
In addition to regulatory requirements, TRaC can also provide performance testing. This type of testing provides confidence that the product is operating as intended and adds value to prospective customers.
| Standard | Description | |
|---|---|---|
| Telecoms | ITU-T G.707 | Network node interface for the synchronous digital hierarchy (SDH) |
| ITU-T G.825 | The control of jitter and wander within digital networks which are based on the synchronous digital hierarchy (SDH) | |
| ITU-T G.957 | Optical interfaces for equipments and systems relating to the synchronous digital hierarchy |
Optical testing
TRaC provides optical testing services for equipment that supports the internationally-based Synchronous Digital Hierarchy (SDH) or the North American-based Synchronous Optical NETwork (SONET).
Typical Products
Optical telecommunications equipment with interfaces ranging from STM-1/OC-3 (155Mbit/s) to STM-16/OC-48 (2.5Gbit/s).
Regulatory Testing
Below is listed a typical technical standard that we test against.
| Country | Standard | Title |
|---|---|---|
| Hong Kong | HKTA 2039 | Network Connection Specification for Connection of Customer Premises Equipment (CPE) to the Public Telecommunications Networks (PTNs) in Hong Kong using Optical Leased Circuits with Synchronous Optical Network (SONET) Interface |
Conformance Testing
In addition to regulatory testing, there are a number of conformance standards that TRaC is able to test against.
Below are listed the most popular.
| Standard | Title |
|---|---|
| ITU-T G.707 | Network node interface for the synchronous digital hierarchy (SDH) |
| ITU-T G.825 | The control of jitter and wander within digital networks which are based on the synchronous digital hierarchy (SDH) |
| ITU-T G.957 | Optical interfaces for equipments and systems relating to the synchronous digital hierarchy |
The Complete Package
Our managed service includes gaining the necessary Telecoms, Radio, EMC, Safety and Environmental Assessment for your device.
TRaC facilities offers a wide range of accredited Electromagnetic Compatibility (EMC)and wireless testing services. Our experienced staff can assist with all EMC requirements for compliance testing to European and international standards, and can advise on pre-compliance investigative testing, which is invaluable in product development.Read more about EMC Testing for Commercial Markets.
TRaC can provide safety testing and certification for electronic / electrical products to meet the growing needs for worldwide compliance. Read more about Electrical Safety Testing Certification.
TRaC provides environmental testing and evaluation to European and international environmental standards, and to customer bespoke specifications and purchase requirements. TRaC has accreditation to test to a wide range of environmental standards, including many of the IEC60068 series as well as ETSI 300-019. Read more about Climatic Testing capabilities. Read more about Dynamic Testing capabilities.
Testing at TRaC is only a small part of what we can do to aid you in achieving your "product to market" goals. The Approvals Group at TRaC offers a completely managed service for all key markets around the world. Read more Country Approvals.
