Try with one more translation patterns only for outgoing.
translation-rule 1
rule 1 ^6547 8345
dial-peer voice 10 voip
translate-outgoing called 1On Cisco CallManager, make a translation pattern and change the called party number from 6547 to 8345.
For more information on Tranlsation rule refer to Mapping Outbound VoIP Calls to Specific Digital Voice Ports and Mapping Outbound Calls to Unique FXS/FXO Ports on Analog Gateways.