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TDM/TDC Encoding Overview
How TDM Interleaving Works
Copyright © 2018, Juniper Networks, Inc.
At the DTE, that signal is placed onto the ST lead, which is configured as an output.
Figure 7: Transparent Encoding Using ST Clocking
Transparent Circuit
DTE
Adapter
1
1
2
2
2
2
24
24
RTS
4
4
4
4
DTR
20
20
20
20
15
15
15
15
3
3
3
3
17
17
17
17
5
CTS
5
5
6
6
7
7
DSR
6
6
When you configure transparent encoding to use the ST lead instead of RTS/CTS, you
can specify whether or not ST is an input lead.
Transparent Encoding Applications and Support Overview on page 12
How Basic Transparent Encoding Works on page 13
Using Phase-Correction FIFO Buffer with Transparent Encoding on page 14
Configuring Transparent Encoding for CTP Bundles (CTP Menu) on page 60
Configuring Transparent Encoding for CTP Bundles (CTPView) on page 58
The time domain correlation (TDC) feature uses time division multiplexing (TDM) to
interleave multiple data types on serial ports so that the CTP device can bond two circuits
into a single data stream. Doing so allows the CTP device to carry two independent data
streams on the same path through the IP network . Out of each set of 32 bits in the IP
data stream, you can designate a certain number of bits for TDM functions.
The TDM/TDC feature is commonly used for telemetry applications, and is supported
on CTP2000 serial interfaces.
When TDM is not being used, all 32 bits in the IP data stream transport serial data on a
port. For example,
Figure 8 on page 18
port data as indicated with the D.
SD
TT
RTS
DTR
FIFO
ST
FIFO
RD
RT
CTS
DSR
IP Network
Red = Send timing (ST) path
Blue = Send data (SD path
shows all 32 bits being allocated to local serial
Chapter 1: Overview of CTP Bundles
Transparent Circuit
Adapter
DCE
1
1
3
3
2
2
RD
RT
17
CTS
5
5
4
4
RTS
DSR
6
6
20
20
DTR
15
15
15
15
ST
2
2
3
3
SD
24
24
17
17
TT
4
RTS
20
20
5
5
CTS
DTR
7
7
6
6
DSR
17
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