Payload type 126/127 or 0/8 as the RTP ?

[x.thomas]

Can you explain me what are the diferencies between the dynamic payload type 126/127 as the RTP payload type (fax pass-through mode) for G.711 µ-law/G.711 A-law and the standard payload type 0/8 as the RTP payload type (fax pass-through mode) for G.711 µ-law/G.711 A-law ?

I want to use fax connect to an ATA 186 I1 and I need to configure the connect mode parameter.

Thank you for the answer...

[ebreniz]

Cisco-pcm-switch-over-alaw is type 127

and Cisco-pcm-switch-over-ulaw is type 126

http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_feature_guide09186a00800b5d75.html