Fax configuration

#### Modem Pass through ####

#### Global Mode ####

 voice service voip
 modem passthrough nse codec g711ulaw redundancy maximum-session 5

#### Dial-peer mode ####

 dial-peer voice 2 voip
 incoming called-number 020..
 destination-pattern 55511..
 modem passthrough nse codec g711ulaw redundancy
 session target ipv4:10.10.0.2

For more configurations please visit http://www.cisco.com/en/US/docs/ios/voice/fax/configuration/guide/vf_cfg_fx_passthr_ps6350_TSD_Products_Configuration_Guide_Chapter.html#wp1039411

Fax configuration