When I try to dial out I get an error:
Operating with different codecs [0x2 (gsm)] [0x4 (ulaw)] , can’t native bridge..

Here are the details:

— Accepting AUTHENTICATED call from 66.18.210.217:
> requested format = gsm,
> requested prefs = (),
> actual format = gsm,
> host prefs = (gsm|ilbc|ulaw|alaw|speex),
> priority = mine
— Executing [1800847xxxx@iax_zoiper_kathy:1] Macro(“IAX2/zoiper_kathy_old_phone-2047”, “tollfree,1800847xxxxx”) in new stack
— Executing [s@macro-tollfree:1] Dial(“IAX2/zoiper_kathy_old_phone-2047”, “IAX2/xxxx@voip/180084777xx,150,tr”) in new stack
— Called IAX2/xxxxxx@voip/1800847777x
— Call accepted by 184.75.215.114 (format ulaw)
— Format for call is ulaw
— IAX2/voip-2745 is making progress passing it to IAX2/zoiper_kathy_old_phone-2047
— IAX2/voip-2745 answered IAX2/zoiper_kathy_old_phone-2047
— Operating with different codecs [0x2 (gsm)] [0x4 (ulaw)] , can’t native bridge…
— Operating with different codecs [0x2 (gsm)] [0x4 (ulaw)] , can’t native bridge…

Is is it possible to make it to work besides switching to “ulaw”