Configuring the traffic interfaces | 90
4. Set the Q4EM E wire interface to either Normal or Inverted.
This determines the state of the CAS bit relative to the state of the E wire:
E wire output CAS bit Normal
(default)
CAS bit Inverted
Output Active 0 1
Output Inactive 1 0
5. Set the Q4EM M wire interface to either Normal or Inverted.
This determines the state of the CAS bit relative to the state of the M wire:
M wire input CAS bit Normal
(default)
CAS bit Inverted
Input Active 0 1
Input Inactive 1 0
6. Click Apply to apply changes or Reset to restore the previous configuration.
7. Select Q4EM PCM Law Control from the Quick Links box.
This option sets the companding law used by the four ports on the Q4EM card.
A-Law is used internationally (default).
µ-Law is used in North America and Japan.
Note: The PCM Law Control controls all four ports on the Q4EM card. To run a mixture of µ-Law
and A-Law interfaces, multiple Q4EM cards are necessary.
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