Online Data Transfer Units Converter
How to Convert from T4 (signal) to STM-4 (signal)?
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How to Convert from T4 (signal) to STM-4 (signal)?

Learn how to convert data transfer units from T4 (signal) in the North American T-carrier hierarchy to STM-4 (signal) in the Synchronous Digital Hierarchy (SDH). This tool supports legacy to modern telecom network conversions.

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

T4 (signal) to STM-4 (signal) Conversion Table

T4 (signal) STM-4 (signal)

Custom Unit Conversion Table Generator – Instant Printable Conversion Tables

Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.
Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.
Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.
T4 (signal) to STM-4 (signal) Conversion Table
T4 (signal) STM-4 (signal)

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  8. How to convert from T4 (signal) to kilobyte/second (SI def.)?
  9. How to convert from kilobit/second [kb/s] to T4 (signal)?
  10. How to convert from T4 (signal) to kilobit/second [kb/s]?
  11. How to convert from kilobyte/second [kB/s] to T4 (signal)?
  12. How to convert from T4 (signal) to kilobyte/second [kB/s]?
  13. How to convert from megabit/second (SI def.) to T4 (signal)?
  14. How to convert from T4 (signal) to megabit/second (SI def.)?
  15. How to convert from megabyte/second (SI def.) to T4 (signal)?
  16. How to convert from T4 (signal) to megabyte/second (SI def.)?
  17. How to convert from megabit/second [Mb/s] to T4 (signal)?
  18. How to convert from T4 (signal) to megabit/second [Mb/s]?
  19. How to convert from megabyte/second [MB/s] to T4 (signal)?
  20. How to convert from T4 (signal) to megabyte/second [MB/s]?
  21. How to convert from gigabit/second (SI def.) to T4 (signal)?
  22. How to convert from T4 (signal) to gigabit/second (SI def.)?
  23. How to convert from gigabyte/second (SI def.) to T4 (signal)?
  24. How to convert from T4 (signal) to gigabyte/second (SI def.)?
  25. How to convert from gigabit/second [Gb/s] to T4 (signal)?
  26. How to convert from T4 (signal) to gigabit/second [Gb/s]?
  27. How to convert from gigabyte/second [GB/s] to T4 (signal)?
  28. How to convert from T4 (signal) to gigabyte/second [GB/s]?
  29. How to convert from terabit/second (SI def.) to T4 (signal)?
  30. How to convert from T4 (signal) to terabit/second (SI def.)?
  31. How to convert from terabyte/second (SI def.) to T4 (signal)?
  32. How to convert from T4 (signal) to terabyte/second (SI def.)?
  33. How to convert from terabit/second [Tb/s] to T4 (signal)?
  34. How to convert from T4 (signal) to terabit/second [Tb/s]?
  35. How to convert from terabyte/second [TB/s] to T4 (signal)?
  36. How to convert from T4 (signal) to terabyte/second [TB/s]?
  37. How to convert from ethernet to T4 (signal)?
  38. How to convert from T4 (signal) to ethernet?
  39. How to convert from ethernet (fast) to T4 (signal)?
  40. How to convert from T4 (signal) to ethernet (fast)?
  41. How to convert from ethernet (gigabit) to T4 (signal)?
  42. How to convert from T4 (signal) to ethernet (gigabit)?
  43. How to convert from OC1 to T4 (signal)?
  44. How to convert from T4 (signal) to OC1?
  45. How to convert from OC3 to T4 (signal)?
  46. How to convert from T4 (signal) to OC3?
  47. How to convert from OC12 to T4 (signal)?
  48. How to convert from T4 (signal) to OC12?
  49. How to convert from OC24 to T4 (signal)?
  50. How to convert from T4 (signal) to OC24?
  51. How to convert from OC48 to T4 (signal)?
  52. How to convert from T4 (signal) to OC48?
  53. How to convert from OC192 to T4 (signal)?
  54. How to convert from T4 (signal) to OC192?
  55. How to convert from OC768 to T4 (signal)?
  56. How to convert from T4 (signal) to OC768?
  57. How to convert from ISDN (single channel) to T4 (signal)?
  58. How to convert from T4 (signal) to ISDN (single channel)?
  59. How to convert from ISDN (dual channel) to T4 (signal)?
  60. How to convert from T4 (signal) to ISDN (dual channel)?
  61. How to convert from modem (110) to T4 (signal)?
  62. How to convert from T4 (signal) to modem (110)?
  63. How to convert from modem (300) to T4 (signal)?
  64. How to convert from T4 (signal) to modem (300)?
  65. How to convert from modem (1200) to T4 (signal)?
  66. How to convert from T4 (signal) to modem (1200)?
  67. How to convert from modem (2400) to T4 (signal)?
  68. How to convert from T4 (signal) to modem (2400)?
  69. How to convert from modem (9600) to T4 (signal)?
  70. How to convert from T4 (signal) to modem (9600)?
  71. How to convert from modem (14.4k) to T4 (signal)?
  72. How to convert from T4 (signal) to modem (14.4k)?
  73. How to convert from modem (28.8k) to T4 (signal)?
  74. How to convert from T4 (signal) to modem (28.8k)?
  75. How to convert from modem (33.6k) to T4 (signal)?
  76. How to convert from T4 (signal) to modem (33.6k)?
  77. How to convert from modem (56k) to T4 (signal)?
  78. How to convert from T4 (signal) to modem (56k)?
  79. How to convert from SCSI (Async) to T4 (signal)?
  80. How to convert from T4 (signal) to SCSI (Async)?
  81. How to convert from SCSI (Sync) to T4 (signal)?
  82. How to convert from T4 (signal) to SCSI (Sync)?
  83. How to convert from SCSI (Fast) to T4 (signal)?
  84. How to convert from T4 (signal) to SCSI (Fast)?
  85. How to convert from SCSI (Fast Ultra) to T4 (signal)?
  86. How to convert from T4 (signal) to SCSI (Fast Ultra)?
  87. How to convert from SCSI (Fast Wide) to T4 (signal)?
  88. How to convert from T4 (signal) to SCSI (Fast Wide)?
  89. How to convert from SCSI (Fast Ultra Wide) to T4 (signal)?
  90. How to convert from T4 (signal) to SCSI (Fast Ultra Wide)?
  91. How to convert from SCSI (Ultra-2) to T4 (signal)?
  92. How to convert from T4 (signal) to SCSI (Ultra-2)?
  93. How to convert from SCSI (Ultra-3) to T4 (signal)?
  94. How to convert from T4 (signal) to SCSI (Ultra-3)?
  95. How to convert from SCSI (LVD Ultra80) to T4 (signal)?
  96. How to convert from T4 (signal) to SCSI (LVD Ultra80)?
  97. How to convert from SCSI (LVD Ultra160) to T4 (signal)?
  98. How to convert from T4 (signal) to SCSI (LVD Ultra160)?
  99. How to convert from IDE (PIO mode 0) to T4 (signal)?
  100. How to convert from T4 (signal) to IDE (PIO mode 0)?
  101. How to convert from IDE (PIO mode 1) to T4 (signal)?
  102. How to convert from T4 (signal) to IDE (PIO mode 1)?
  103. How to convert from IDE (PIO mode 2) to T4 (signal)?
  104. How to convert from T4 (signal) to IDE (PIO mode 2)?
  105. How to convert from IDE (PIO mode 3) to T4 (signal)?
  106. How to convert from T4 (signal) to IDE (PIO mode 3)?
  107. How to convert from IDE (PIO mode 4) to T4 (signal)?
  108. How to convert from T4 (signal) to IDE (PIO mode 4)?
  109. How to convert from IDE (DMA mode 0) to T4 (signal)?
  110. How to convert from T4 (signal) to IDE (DMA mode 0)?
  111. How to convert from IDE (DMA mode 1) to T4 (signal)?
  112. How to convert from T4 (signal) to IDE (DMA mode 1)?
  113. How to convert from IDE (DMA mode 2) to T4 (signal)?
  114. How to convert from T4 (signal) to IDE (DMA mode 2)?
  115. How to convert from IDE (UDMA mode 0) to T4 (signal)?
  116. How to convert from T4 (signal) to IDE (UDMA mode 0)?
  117. How to convert from IDE (UDMA mode 1) to T4 (signal)?
  118. How to convert from T4 (signal) to IDE (UDMA mode 1)?
  119. How to convert from IDE (UDMA mode 2) to T4 (signal)?
  120. How to convert from T4 (signal) to IDE (UDMA mode 2)?
  121. How to convert from IDE (UDMA mode 3) to T4 (signal)?
  122. How to convert from T4 (signal) to IDE (UDMA mode 3)?
  123. How to convert from IDE (UDMA mode 4) to T4 (signal)?
  124. How to convert from T4 (signal) to IDE (UDMA mode 4)?
  125. How to convert from IDE (UDMA-33) to T4 (signal)?
  126. How to convert from T4 (signal) to IDE (UDMA-33)?
  127. How to convert from IDE (UDMA-66) to T4 (signal)?
  128. How to convert from T4 (signal) to IDE (UDMA-66)?
  129. How to convert from USB to T4 (signal)?
  130. How to convert from T4 (signal) to USB?
  131. How to convert from firewire (IEEE-1394) to T4 (signal)?
  132. How to convert from T4 (signal) to firewire (IEEE-1394)?
  133. How to convert from T0 (payload) to T4 (signal)?
  134. How to convert from T4 (signal) to T0 (payload)?
  135. How to convert from T0 (B8ZS payload) to T4 (signal)?
  136. How to convert from T4 (signal) to T0 (B8ZS payload)?
  137. How to convert from T1 (signal) to T4 (signal)?
  138. How to convert from T4 (signal) to T1 (signal)?
  139. How to convert from T1 (payload) to T4 (signal)?
  140. How to convert from T4 (signal) to T1 (payload)?
  141. How to convert from T1Z (payload) to T4 (signal)?
  142. How to convert from T4 (signal) to T1Z (payload)?
  143. How to convert from T1C (signal) to T4 (signal)?
  144. How to convert from T4 (signal) to T1C (signal)?
  145. How to convert from T1C (payload) to T4 (signal)?
  146. How to convert from T4 (signal) to T1C (payload)?
  147. How to convert from T2 (signal) to T4 (signal)?
  148. How to convert from T4 (signal) to T2 (signal)?
  149. How to convert from T3 (signal) to T4 (signal)?
  150. How to convert from T4 (signal) to T3 (signal)?
  151. How to convert from T3 (payload) to T4 (signal)?
  152. How to convert from T4 (signal) to T3 (payload)?
  153. How to convert from T3Z (payload) to T4 (signal)?
  154. How to convert from T4 (signal) to T3Z (payload)?
  155. How to convert from E.P.T.A. 1 (signal) to T4 (signal)?
  156. How to convert from T4 (signal) to E.P.T.A. 1 (signal)?
  157. How to convert from E.P.T.A. 1 (payload) to T4 (signal)?
  158. How to convert from T4 (signal) to E.P.T.A. 1 (payload)?
  159. How to convert from E.P.T.A. 2 (signal) to T4 (signal)?
  160. How to convert from T4 (signal) to E.P.T.A. 2 (signal)?
  161. How to convert from E.P.T.A. 2 (payload) to T4 (signal)?
  162. How to convert from T4 (signal) to E.P.T.A. 2 (payload)?
  163. How to convert from E.P.T.A. 3 (signal) to T4 (signal)?
  164. How to convert from T4 (signal) to E.P.T.A. 3 (signal)?
  165. How to convert from E.P.T.A. 3 (payload) to T4 (signal)?
  166. How to convert from T4 (signal) to E.P.T.A. 3 (payload)?
  167. How to convert from H0 to T4 (signal)?
  168. How to convert from T4 (signal) to H0?
  169. How to convert from H11 to T4 (signal)?
  170. How to convert from T4 (signal) to H11?
  171. How to convert from H12 to T4 (signal)?
  172. How to convert from T4 (signal) to H12?
  173. How to convert from Virtual Tributary 1 (signal) to T4 (signal)?
  174. How to convert from T4 (signal) to Virtual Tributary 1 (signal)?
  175. How to convert from Virtual Tributary 1 (payload) to T4 (signal)?
  176. How to convert from T4 (signal) to Virtual Tributary 1 (payload)?
  177. How to convert from Virtual Tributary 2 (signal) to T4 (signal)?
  178. How to convert from T4 (signal) to Virtual Tributary 2 (signal)?
  179. How to convert from Virtual Tributary 2 (payload) to T4 (signal)?
  180. How to convert from T4 (signal) to Virtual Tributary 2 (payload)?
  181. How to convert from Virtual Tributary 6 (signal) to T4 (signal)?
  182. How to convert from T4 (signal) to Virtual Tributary 6 (signal)?
  183. How to convert from Virtual Tributary 6 (payload) to T4 (signal)?
  184. How to convert from T4 (signal) to Virtual Tributary 6 (payload)?
  185. How to convert from STS1 (signal) to T4 (signal)?
  186. How to convert from T4 (signal) to STS1 (signal)?
  187. How to convert from STS1 (payload) to T4 (signal)?
  188. How to convert from T4 (signal) to STS1 (payload)?
  189. How to convert from STS3 (signal) to T4 (signal)?
  190. How to convert from T4 (signal) to STS3 (signal)?
  191. How to convert from STS3 (payload) to T4 (signal)?
  192. How to convert from T4 (signal) to STS3 (payload)?
  193. How to convert from STS3c (signal) to T4 (signal)?
  194. How to convert from T4 (signal) to STS3c (signal)?
  195. How to convert from STS3c (payload) to T4 (signal)?
  196. How to convert from T4 (signal) to STS3c (payload)?
  197. How to convert from STS12 (signal) to T4 (signal)?
  198. How to convert from T4 (signal) to STS12 (signal)?
  199. How to convert from STS24 (signal) to T4 (signal)?
  200. How to convert from T4 (signal) to STS24 (signal)?
  201. How to convert from STS48 (signal) to T4 (signal)?
  202. How to convert from T4 (signal) to STS48 (signal)?
  203. How to convert from STS192 (signal) to T4 (signal)?
  204. How to convert from T4 (signal) to STS192 (signal)?
  205. How to convert from STM-1 (signal) to T4 (signal)?
  206. How to convert from T4 (signal) to STM-1 (signal)?
  207. How to convert from STM-4 (signal) to T4 (signal)?
  208. How to convert from T4 (signal) to STM-4 (signal)?
  209. How to convert from STM-16 (signal) to T4 (signal)?
  210. How to convert from T4 (signal) to STM-16 (signal)?
  211. How to convert from STM-64 (signal) to T4 (signal)?
  212. How to convert from T4 (signal) to STM-64 (signal)?

What Is This Tool?

This unit converter allows you to translate data transfer rates from the T4 (signal), a high-order trunk signal in the North American PDH system, to the STM-4 (signal), a standardized optical transmission frame within the SDH framework. It supports tasks related to telecom network migration and equipment interoperability.

How to Use This Tool?

  • Enter the data transfer value in T4 (signal) units
  • Select T4 (signal) as the source unit and STM-4 (signal) as the target unit
  • Click convert to obtain the equivalent STM-4 (signal) value based on the conversion rate
  • Use the result for network planning or validation purposes

Key Features

  • Converts data rates from T4 (signal) to STM-4 (signal) easily
  • Supports legacy PDH to modern SDH network transitions
  • Browser-based and simple to use
  • Includes examples demonstrating conversion calculations
  • Facilitates telecom backbone infrastructure upgrade planning

Examples

  • 1 T4 (signal) equals approximately 0.4407407407 STM-4 (signal)
  • 5 T4 (signal) converts to about 2.2037037035 STM-4 (signal)

Common Use Cases

  • Migrating from North American PDH T-carrier systems to SDH optical networks
  • Testing and validating interoperability between legacy and current telecom equipment
  • Managing specialized or private networks operating legacy T-carrier infrastructure

Tips & Best Practices

  • Confirm network requirements before conversion to ensure compatibility
  • Consider additional overhead and synchronization differences when planning network integrations
  • Use the converter as part of broader telecom migration and validation workflows

Limitations

  • Primarily applicable for legacy and transitional telecom network contexts
  • May require extra equipment or procedures due to differences in framing and synchronization between PDH and SDH
  • Assumes nominal line rates and does not reflect protocol-specific details or overhead

Frequently Asked Questions

What is T4 (signal)?
T4 (signal) is a high-order trunk signal within the North American T-carrier hierarchy used historically for long-distance carrier backbone links at roughly 274.176 Mbps.

What does STM-4 (signal) represent?
STM-4 (signal) is a Synchronous Transport Module level‑4 in the SDH framework, featuring a nominal line rate of 622.08 Mbps used to multiplex and transport digital traffic over optical networks.

Why convert from T4 (signal) to STM-4 (signal)?
Conversion supports migrating from legacy PDH systems to modern SDH infrastructure, enabling compatibility and efficient aggregation of data rates during telecom network upgrades.

Key Terminology

T4 (signal)
A high-order trunk signal in the North American T-carrier hierarchy representing the DS4 rate, used historically for long-distance telecom trunks at about 274.176 megabits per second.
STM-4 (signal)
Synchronous Transport Module level‑4 in the SDH system featuring a standard optical transmission line rate of 622.08 megabits per second, used for multiplexing and transporting digital traffic.
PDH
Plesiochronous Digital Hierarchy, a telecommunications transmission technology used primarily in North America before widespread adoption of SDH/SONET.
SDH
Synchronous Digital Hierarchy, a standardized protocol used for optical telecommunications transport systems, supporting higher data rates and network management.

Quick Knowledge Check

What type of hierarchy does T4 (signal) belong to?
Approximately what is the nominal line rate of STM-4 (signal)?
Which use case is related to converting T4 (signal) to STM-4 (signal)?

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