Call is answered:

incoming callleg:
  NativeFormats: (alaw)
    WriteFormat: alaw
     ReadFormat: alaw
 WriteTranscode: No 
  ReadTranscode: No 

outgoing callleg to sipclient:
  NativeFormats: (ulaw)
    WriteFormat: alaw
     ReadFormat: alaw
 WriteTranscode: Yes (alaw)->(ulaw)
  ReadTranscode: Yes (ulaw)->(alaw)

----------------------------
During call is put on Hold from sipclient

incoming callleg:
  NativeFormats: (alaw)
    WriteFormat: slin
     ReadFormat: alaw
 WriteTranscode: Yes (slin)->(alaw)

outgoing callleg to sipclient:
  NativeFormats: (alaw)
    WriteFormat: alaw
     ReadFormat: alaw
 WriteTranscode: No 
  ReadTranscode: No 

-------------------------
After call is taken back from Hold

incoming callleg:
  NativeFormats: (alaw)
    WriteFormat: alaw
     ReadFormat: alaw
 WriteTranscode: No 
  ReadTranscode: No 

outgoing callleg to sipclient:
  NativeFormats: (alaw)
    WriteFormat: alaw
     ReadFormat: alaw
 WriteTranscode: No 
  ReadTranscode: No