TXC-03456 - L4M Device Level 4 Mapper

Transwitch

General Description

The L4M device maps a 139.264 Mbit/s asynchronous line signal into an AU-4 VC-4/STS-3c SPE signal.

The SDH/SONET signal is transmitted via the add bus with timing derived from the drop bus, add bus, or external clock source.

Key Features

h S a at . D w w w L4M Device Level 4 Mapper TXC-03456 DATA SHEET.

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TXC-03456 l4m device level 4 mapper by Transwitch - Datasheet Preview

Datasheet Details

Part number	TXC-03456
Manufacturer	Transwitch
File Size	1.24 MB
Description	L4M Device Level 4 Mapper
Datasheet	TXC-03456 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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m o .c U 4 t e e FEATURES h S a at .D w w w L4M Device Level 4 Mapper TXC-03456 DATA SHEET DESCRIPTION The L4M device maps a 139.264 Mbit/s asynchronous line signal into an AU-4 VC-4/STS-3c SPE signal. The SDH/SONET signal is transmitted via the add bus with timing derived from the drop bus, add bus, or external clock source. The L4M can compensate for up to a frame offset when using external timing and an external C1 pulse. An option is provided to generate TOH bytes, such as the A1 and A2 framing bytes, a C1 byte, and the H1 and H2 pointer bytes only in drop bus and external timing modes. The VC-4/SPE can be fixed to a known J1 reference when add bus timing is selected, or it can be positioned with a pointer value of 0 or 522 when drop bus or external timing is selected.