NEC MH240 - PREFIX DIAL; TO USE PREFIX DIAL

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Set the Codec:
Factory Default: 1.Auto
You can set the codec type that is used for the phone as required.
STEP1: On the Advanced menu, press key to select “2.Codec” and then press “OK” soft
key or press .
STEP2: Press key to select an appropriate codec and then press “OK” soft key.
STEP3: Press to save.
Advanced
5.Jitter Buffer
1.Register Timer
2.Codec
3.Payload Size
4.DTMF Mode
Codec
OK Back
1.Auto
2.G.711u
3.G.711a
4.G.729A