Default for Bell 103 return channel

[fragglet]

According to wikipedia:

The Bell 103 modem used audio frequency-shift keying to encode data. Different pairs of audio frequencies were used by each station:

The originating station used a mark tone of 1,270 Hz and a space tone of 1,070 Hz.
The answering station used a mark tone of 2,225 Hz and a space tone of 2,025 Hz.

minimodem has a default for Bell 103 but only for the originating station. Would it be useful to have an equivalent that transmits using the frequencies assigned for the answering station. Obviously it's already possible to configure this manually using the -M and -S options, but it could be convenient.