FBUS or MBUS ?

Hello friends:
It was revising documents of the pines connection and diagram circuital of the CABLE DATES for the NOKIA 5190, but I don't find one that is the most appropriate, although some recommended me that it is the same cable it dates of the 51xx/61xx, however I have some doubts:
1. - which mode to use: FBUS or MBUS?
2. - which electronic component is the best, with the MAX232 or MAX3232? reason?
However, if somebody has the pines configuration and diagram circuital, original of NOKIA 5190, I will be very grateful.
Thanks to all, greetings from PERU, excuse but I speak little English

JULIO