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fax protocol cisco not supported on ios Version 15.3(1)T1

i'm trying to setup a C3925 and trying to configure fax .but later found it no longer support " fax protocol cisco" as shown on the help commad. is there a no way to enable this or i'm just missing something? we are going to migrate our voice gateway C3825 to this c3925..

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fax protocol cisco not supported on ios Version 15.3(1)T1

The PVDM3 DSPs do not support Cisco proprietary fax relay. You can use T.38 instead, or fax passthrough for devices which don't support T.38 (e.g. ATA186).

http://www.cisco.com/en/US/docs/ios/voice/fax/configuration/guide/vf_cfg_t38_fxrly.html

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