T4 (signal) is a high-order trunk signal in the North American T-carrier hierarchy corresponding to DS4 rate, carrying multiplexed lower-order channels at about 274.176 Mbps.

What does a Virtual Tributary 2 (signal) represent?

Virtual Tributary 2 (VT2) is a SONET/SDH sub-rate format that carries a 2.048 Mbps payload (an E1 channel) within a higher-rate SONET/SDH frame.

Why convert from T4 to Virtual Tributary 2 signals?

Conversion allows translating legacy PDH backbone signals into multiple lower-rate SONET sub-signals to facilitate compatibility and effective network interworking.

Is this conversion still relevant?

While T4 (signal) usage is largely historical, the conversion is useful during legacy network integration and upgrades to SONET/SDH environments.

How to Convert from T4 (signal) to Virtual Tributary 2 (signal)?

Learn how to convert data transfer values from T4 (signal), a high-order PDH trunk signal, to Virtual Tributary 2 (VT2), a lower-rate SONET/SDH signal format, with detailed steps and use cases.

T4 (signal)

Virtual Tributary 2 (signal)

Please check your input. It must be a valid numeric value.

T4 (signal) to Virtual Tributary 2 (signal) Conversion Table

T4 (signal)	Virtual Tributary 2 (signal)

Custom Unit Conversion Table Generator – Instant Printable Conversion Tables

Start Value

Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.

End Value

Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.

Interval

Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.

T4 (signal) to Virtual Tributary 2 (signal) Conversion Table
T4 (signal)	Virtual Tributary 2 (signal)

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What Is This Tool?

This tool converts values from T4 (signal), a legacy high-capacity trunk signal in the North American T-carrier hierarchy, to Virtual Tributary 2 (signal), a SONET/SDH sub-rate format carrying E1 channels. It helps bridge legacy PDH networks with modern SONET/SDH infrastructure.

How to Use This Tool?

Enter the value in T4 (signal) units you want to convert
Select Virtual Tributary 2 (signal) as the target unit
Click the convert button to see the equivalent number of Virtual Tributary 2 (signal) units
Review the result to assist with network planning or equipment configuration

Key Features

Converts high-order T4 (signal) values to multiple Virtual Tributary 2 (signal) units
Supports telecom applications involving PDH and SONET/SDH interworking
Provides quick calculation based on standard conversion rate: 1 T4 = 119 VT2
Browser-based and easy to use with clear input and output fields

Examples

Converting 1 T4 (signal) results in 119 Virtual Tributary 2 (signal)
Converting 2 T4 (signal) yields 238 Virtual Tributary 2 (signal)

Common Use Cases

Translating high-capacity legacy PDH backbone signals into SONET sub-signals
Configuring SONET multiplexers or digital cross-connects for lower-rate PDH channels
Planning capacity and provisioning telecom networks that interwork with E1 and PDH services
Testing and validation of telecommunications equipment supporting T4 and VT2 signals

Tips & Best Practices

Ensure network equipment supports the specific T-carrier and SONET/SDH protocols involved
Use the tool for legacy network integration and modernization planning
Verify actual equipment behavior as mapping may differ by protocol and region
Consider limitations of legacy signals when designing new network segments

Limitations

Conversion assumes ideal multiplexing without considering overhead or framing differences
T4 (signal) is primarily of historical use; current deployments mainly use SONET/SDH or packet networks
Exact signal mapping may vary based on equipment protocols and regional telecom standards

Frequently Asked Questions

What is T4 (signal)?: T4 (signal) is a high-order trunk signal in the North American T-carrier hierarchy corresponding to DS4 rate, carrying multiplexed lower-order channels at about 274.176 Mbps.
What does a Virtual Tributary 2 (signal) represent?: Virtual Tributary 2 (VT2) is a SONET/SDH sub-rate format that carries a 2.048 Mbps payload (an E1 channel) within a higher-rate SONET/SDH frame.
Why convert from T4 to Virtual Tributary 2 signals?: Conversion allows translating legacy PDH backbone signals into multiple lower-rate SONET sub-signals to facilitate compatibility and effective network interworking.
Is this conversion still relevant?: While T4 (signal) usage is largely historical, the conversion is useful during legacy network integration and upgrades to SONET/SDH environments.

Key Terminology

T4 (signal): A high-order North American T-carrier signal at about 274.176 Mbps used primarily in legacy PDH long-distance trunk links.
Virtual Tributary 2 (VT2): A SONET/SDH sub-rate signal carrying a 2.048 Mbps E1 payload within a higher-rate SONET/SDH frame.
PDH: Plesiochronous Digital Hierarchy, a technology used for multiplexing multiple digital signals into higher-rate streams.
SONET/SDH: Synchronous Optical Network/Synchronous Digital Hierarchy, a standard for high-speed optical telecommunications networks.

Quick Knowledge Check

What is the approximate rate of a T4 (signal)?

2.048 Mbps

274.176 Mbps

155 Mbps

How many Virtual Tributary 2 signals equal one T4 signal?

119

100

256

What payload does a Virtual Tributary 2 (VT2) carry?

DS4 channel

E1 channel at 2.048 Mbps

OC-3 signal

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