as5350 question - Please help

I setup the VOIP network with H323. All calls are Gatekeeper routed. When I make a PSTN call either inbound or outbound, as5350 could not establish a call other than g729 codec. Question 1. Why AS5350 uses g729 codec as default ? How you setup a g729 default codec? Question 2. Why AS5350 cannot use other codec like g723? AS5350 release a call right after setup because it can't talk with g723 codec. Gateway was setup only g723 codec to see if AS5350 can talk.

When I say PSTN call, I mean the call initiated from our h323 gateway to PSTN number.

Gateway --> AS5350 PRI --> PSTN number (outbound call) PSTN number --> AS5350 PRI --> H323 gateway (inbound call)

Codec is established in the Internet portion between gateway and AS5350. Gateway is non cisco equipment and setup as g729 and g723 capabilities.

AS5350 Configuration only necessary portion----------------------------------------

voice call send-alert voice rtp send-recv ! voice service pots ! voice service voip fax protocol t38 ls-redundancy 0 hs-redundancy 0 h323 ! voice class codec 1 codec preference 1 g729r8 codec preference 2 g723r63 codec preference 3 g723r53 ! voice class codec 3 codec preference 1 g723r63 ! ! ! voice class h323 1 call start fast ! ! controller T1 2/0 framing esf linecode b8zs pri-group timeslots 1-24 ! interface Serial2/0:23 no ip address isdn switch-type primary-ni isdn incoming-voice modem isdn T306 30000 isdn T310 60000 isdn send-alerting isdn sending-complete no cdp enable ! voice-port 2/0:D echo-cancel coverage 128 no vad bearer-cap Speech ! dial-peer voice 1 pots preference 1 destination-pattern 1.T progress_ind setup enable 3 no digit-strip port 2/0:D forward-digits all ! dial-peer voice 2132332745 voip destination-pattern 2132332745 progress_ind setup enable 3 voice-class codec 1 voice-class h323 1 session target ras ! interface FastEthernet0/0 ip address x.x.x.x no ip proxy-arp duplex auto speed auto no cdp enable h323-gateway voip interface h323-gateway voip id AAAA ipaddr x.x.x.x 1719 h323-gateway voip h323-id as5350 !

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