4. Select 3) Port Config.
5. Select 2) Interface.
6. Select 3) Encoding.
7. Select 5) TDM.
8. Follow the onscreen instructions to configure the parameters as described in
Table 26 on page 65.
9. Configure the rest of the bundle as you normally would.
Table 26: High-Speed CTP Bundle Parameters for TDM/TDC Operation in the CTP Menu
Your ActionFunctionField
Press Enter.Specifies that the TDM function is TDC Clk/Data on port N+1.
This option is available only on even-numbered ports on a CTP2000 serial module, and
when the serial encoding parameter is set to TDM.
TDC Clk/Data on port N+1 oversamples the incoming clock (TT) and data (SD) from the
adjacent port above this one (N+1) at this port’s clock rate, and embeds it in its data. At the
remote end of the network, the embedded circuit data is recovered and exits the node on
port N+1 as RT and RD outputs.
Because of the direct interleaving of two ports’ data, TDC is maintained between these two
ports with an accuracy of one bit time at this port’s data rate.
TDC Clk/Data
on port N+1
Select one:
•
16
•
8
•
4
•
2
Specifies the number of bits out of 32 that are used for the TDM function (and not for local
serial port data).
Appears only if you selected TDM encoding.
Keep in mind the following when you configure the TDM rate:
•
If the rate is too low, the bundle may not carry the low-speed data because of insufficient
oversampling.
•
If the rate is too high, the low-speed circuit will still run, but will likely use more bandwidth
than necessary.
•
You may want to configure a higher rate to increase the TDM rate to reduce jitter on the
low-speed clock and data signals.
TDM rates
65Copyright © 2018, Juniper Networks, Inc.
Chapter 2: Configuring CTP Bundles
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