Hmm, Voice over IP?
PlaneShift uses less than 1kbps / connection.
If you want voice (ISDN quality), you\'d have more like 64kbps / connection.
Maybe it\'s worth to take a look at text2voice thingys.
I know that text2voice stuff is far from perfect. But hey, no improvement without trial.
Furthermore, syntetic voices would fit the characters

At least voice for NPC should be possible.