outgoing call is not working for only specific destination

[networkexpert]

Dear all,

I have issue in outgoing call for only one destination while all other calls are working fine

below the relevant logs 

INVITE sip:xxxx:5060 SIP/2.0
Via: SIP/2.0/TCP xxxx5060;branch=z9hG4bK2c619f1b31c2a6
From: xxxxx
To: xxx
Date: Wed, 08 May 2019 10:20:10 GMT
Call-ID: daa2ae80-cd21ad5a-1c9864-d6a180a@xxx
Supported: timer,resource-priority,replaces
Min-SE: 1800
User-Agent: Cisco-CUCM12.0
Allow: INVITE, OPTIONS, INFO, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY
CSeq: 101 INVITE
Expires: 180
Allow-Events: presence, kpml
Supported: X-cisco-srtp-fallback,X-cisco-original-called
Call-Info: <sip:xxx:5060>;method="NOTIFY;Event=telephone-event;Duration=500"
Call-Info: <urn:x-cisco-remotecc:callinfo>;x-cisco-video-traffic-class=DESKTOP
Session-ID: 6b87414200105000a00008cca7f79224;remote=00000000000000000000000000000000
Cisco-Guid: 3668094592-0000065536-0000036241-0225056778
Session-Expires: 1800
P-Asserted-Identity: xxx
Remote-Party-ID: xxxx;party=calling;screen=yes;privacy=off
Contact: <sip:xxxx:5060;transport=tcp>;+u.sip!devicename.ccm.cisco.com="SEP08CCA7F79224"
Max-Forwards: 69
Content-Type: application/sdp
Content-Length: 503

v=0
o=CiscoSystemsCCM-SIP 24597884 1 IN IP4 xxx
s=SIP Call
c=IN IP4 xxx
b=TIAS:64000
b=AS:64
t=0 0
m=audio 28986 RTP/AVP 114 0 8 116 18 101
b=TIAS:64000
a=rtpmap:114 opus/48000/2
a=fmtp:114 maxplaybackrate=16000;sprop-maxcapturerate=16000;maxaveragebitrate=64000;stereo=0;sprop-stereo=0;usedtx=0
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:116 iLBC/8000
a=maxptime:20
a=fmtp:116 mode=20
a=rtpmap:18 G729/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15

004650: May 8 10:20:11.083 UTC: //314599/DAA2AE800000/SIP/Msg/ccsipDisplayMsg:
Sent:
INVITE sip:xx@xxx:5060 SIP/2.0
Via: SIP/2.0/UDP xxx:5060;branch=z9hG4bK1D1F1D84
Remote-Party-ID: "xx" <sip:xx>;party=calling;screen=yes;privacy=off
From: "xx" <sip:xx@xx>;tag=A3A0791C-239B
To: <sip:xxx>
Date: Wed, 08 May 2019 10:20:11 GMT
Call-ID: B21601E4-70B111E9-A8F1D66A-910FCF0E@xxx
Supported: 100rel,timer,resource-priority,replaces,sdp-anat
Min-SE: 1800
Cisco-Guid: 3668094592-0000065536-0000036241-0225056778
User-Agent: Cisco-SIPGateway/IOS-16.6.4
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY, INFO, REGISTER
CSeq: 101 INVITE
Timestamp: 1557310811
Contact: <sip:xxxxxxx:5060>
Expires: 180

Allow-Events: telephone-event
Max-Forwards: 68
Session-ID: 6b87414200105000a00008cca7f79224;remote=00000000000000000000000000000000
Session-Expires: 1800
Content-Type: application/sdp
Content-Disposition: session;handling=required
Content-Length: 271

v=0
o=CiscoSystemsSIP-GW-UserAgent 7609 7553 IN IP4 xxxx
s=SIP Call
c=IN IP4 xxxx
t=0 0
m=audio 14434 RTP/AVP 0 8 101
c=IN IP4 xxxx
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=ptime:20

004651: May 8 10:20:11.086 UTC: //314598/DAA2AE800000/SIP/Msg/ccsipDisplayMsg:
Sent:
SIP/2.0 100 Trying
Via: SIP/2.0/TCP xxxx:5060;branch=z9hG4bK2c619f1b31c2a6
From: "xxx" <sip:xxx@xxxx>;tag=24597884~2dffb802-4671-4147-930f-debd3b2bae15-46563170
To: <sip:9called number@y.y.y.y>
Date: Wed, 08 May 2019 10:20:11 GMT
Call-ID: daa2ae80-cd21ad5a-1c9864-d6a180a@xxxx
CSeq: 101 INVITE
Allow-Events: telephone-event
Server: Cisco-SIPGateway/IOS-16.6.4
Session-ID: 00000000000000000000000000000000;remote=6b87414200105000a00008cca7f79224
Content-Length: 0

004652: May 8 10:20:11.099 UTC: //314599/DAA2AE800000/SIP/Msg/ccsipDisplayMsg:
Received:
SIP/2.0 100 Trying
Via: SIP/2.0/UDP xxxx:5060;branch=z9hG4bK1D1F1D84
Call-ID: B21601E4-70B111E9-A8F1D66A-910FCF0E@xxxx
From: "xxx"<sip:xxxxxxx>;tag=A3A0791C-239B
To: <sip:called number@x.x.x.x>
CSeq: 101 INVITE
Content-Length: 0

004653: May 8 10:20:11.420 UTC: //314599/DAA2AE800000/SIP/Msg/ccsipDisplayMsg:
Received:
SIP/2.0 503 Service Unavailable
Via: SIP/2.0/UDP xxxx:5060;branch=z9hG4bK1D1F1D84
Record-Route: <sip:x.x.x.x:5060;transport=udp;lr>
Call-ID: B21601E4-70B111E9-A8F1D66A-910FCF0E@xxxx
From: "xxx"<sip:xxxxxxx>;tag=A3A0791C-239B
To: <sip:called number@x.x.x.x>;tag=sbc0804spe7kck7
CSeq: 101 INVITE
Reason: Q.850;cause=47;text="resource unavailable"
Warning: 399 - "SoftX3000 R601-CCU Rel POS:[3103] Release from CR"
Content-Length: 0

004654: May 8 10:20:11.421 UTC: //314599/DAA2AE800000/SIP/Call/sipSPICallInfo:
The Call Setup Information is:
Call Control Block (CCB) : 0x0x7EFE887B66B0
State of The Call : STATE_DEAD
TCP Sockets Used : NO
Calling Number : DID number
Called Number : called number
Source IP Address (Sig ): xxxx
Destn SIP Req Addr:Port : x.x.x.x:5060
Destn SIP Resp Addr:Port : x.x.x.x:5060
Destination Name : x.x.x.x

004655: May 8 10:20:11.421 UTC: //314599/DAA2AE800000/SIP/Call/sipSPIMediaCallInfo:
Number of Media Streams: 1
Media Stream : 1
Negotiated Codec : No Codec
Negotiated Codec Bytes : 0
Nego. Codec payload : 255 (tx), 255 (rx)
Negotiated Dtmf-relay : 0
Dtmf-relay Payload : 0 (tx), 0 (rx)
Source IP Address (Media): xxxx
Source IP Port (Media): 14434
Destn IP Address (Media): -
Destn IP Port (Media): 0
Orig Destn IP Address:Port (Media): [ - ]:0

004656: May 8 10:20:11.421 UTC: //314599/DAA2AE800000/SIP/Call/sipSPICallInfo:
Disconnect Cause (CC) : 38
Disconnect Cause (SIP) : 503

004657: May 8 10:20:11.429 UTC: //314599/DAA2AE800000/SIP/Msg/ccsipDisplayMsg:
Sent:
ACK sip:called number@x.x.x.x:5060 SIP/2.0
Via: SIP/2.0/UDP xxxx:5060;branch=z9hG4bK1D1F1D84
From: "xxx" <sip:xxxxxxx>;tag=A3A0791C-239B
To: <sip:called number@x.x.x.x>;tag=sbc0804spe7kck7
Date: Wed, 08 May 2019 10:20:11 GMT
Call-ID: B21601E4-70B111E9-A8F1D66A-910FCF0E@xxxx
Max-Forwards: 70
CSeq: 101 ACK
Allow-Events: telephone-event
Session-ID: ;remote=
Content-Length: 0

004658: May 8 10:20:11.430 UTC: //314600/DAA2AE800000/SIP/Msg/ccsipDisplayMsg:
Sent:
INVITE sip:called number@x.x.x.x:5060 SIP/2.0
Via: SIP/2.0/UDP xxxx:5060;branch=z9hG4bK1D1F21714
Remote-Party-ID: "xxx" <sip:xxxxxxx>;party=calling;screen=yes;privacy=off
From: "xxx" <sip:xxxxxxx>;tag=A3A07A74-15DC
To: <sip:called number@x.x.x.x>
Date: Wed, 08 May 2019 10:20:11 GMT
Call-ID: B24A57BA-70B111E9-A8F3D66A-910FCF0E@xxxx
Supported: 100rel,timer,resource-priority,replaces,sdp-anat
Min-SE: 1800
Cisco-Guid: 3668094592-0000065536-0000036241-0225056778
User-Agent: Cisco-SIPGateway/IOS-16.6.4
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY, INFO, REGISTER
CSeq: 101 INVITE
Timestamp: 1557310811
Contact: <sip:xxxxxxx:5060>
Expires: 180
Allow-Events: telephone-event
Max-Forwards: 68
Session-ID: 6b87414200105000a00008cca7f79224;remote=00000000000000000000000000000000
Session-Expires: 1800
Content-Type: application/sdp
Content-Disposition: session;handling=required
Content-Length: 271

v=0
o=CiscoSystemsSIP-GW-UserAgent 5708 2742 IN IP4 xxxx
s=SIP Call
c=IN IP4 xxxx
t=0 0

m=audio 14436 RTP/AVP 0 8 101
c=IN IP4 xxxx
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=ptime:20

[Flo.Matalis]

From the logs, looks like you have RECEIVED the 503 Service Unavailable from the provider. Have you checked with the provider?