[Asterisk-Users] Zap<-->IAX codec?

[Mimmus]

Hi,
at my Asterisk box, I have a few of IAX2 phones (configured with
alaw/ulaw/gsm codecs, in this order) and a PRI E1 line.
In iax.conf I hav:
 disallow=all
 allow=alaw
 allow=ulaw
 allow=gsm

During some incoming call, I read at console:
    -- Executing Dial("Zap/2-1", "IAX2/215|20|TtwW") in new stack
    -- Called 215
    -- Call accepted by 10.97.1.7 (format ulaw)
    -- Format for call is ulaw
    -- IAX2/215-33 is ringing
    -- IAX2/215-33 answered Zap/2-1

Why I have 'Format for call is ulaw'? I'd like to have alaw but keep ulaw to
accomodate errors in various configurations (if any, not here!).

--
Mimmus