Manpages of src:libgsm in Debian buster

• gsm(3)
• gsm_create(3)
• gsm_decode(3)
• gsm_destroy(3)
• gsm_encode(3)
• gsm_explode(3)
• gsm_implode(3)
• tcat(1)
• toast(1)
• untoast(1)