Technicolor COM2000 Integrator's Manual page 107

 Reuse of the same PID value is a major contributing factor in key loss and should be
avoided when mapping out the IP and port scheme used to send the data to the QAM.
 DO NOT USE THE FIRST TWO UDP PORTS AVAILABLE OVER AND OVER
AGAIN. Channels that are set up this way will have PID values 10, 13, 18 and 19 or 20, 23,
28 and 29 associated with them.
Figure 83 shows a Harmonic QAM setup with incorrect PID remapping
Figure 83 - Harmonic Setup with Incorrect PID Mapping
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