Depends how you modulate it, but if you went for the widest possible 3.2kbps Codec2 stream and assumed 1kbps is roughly 1kHz of bandwidth (something like a G3RU

Depends how you modulate it, but if you went for the widest possible 3.2kbps Codec2 stream and assumed 1kbps is roughly 1kHz of bandwidth (something like a G3RUH modem does about this) you'd be looking at about 60 streams.