I have a similar issue  but i am seeing media error code 61
19:34:19.277: $-NET:SIP::0:261
19:34:19.791 Trc 04541 RequestMakeCall received from [224] (0000000c WorkspaceDesktop_2004 192.168.3.43:54877)
message RequestMakeCall
	AttributeReferenceID	13
	AttributeThisDN	'1004'
	AttributeUserData	[106] 00 02 00 00..
		'IW_CaseUid'	'306ca7d8-41e1-4ba6-8f3f-f0857cfb9f55'
		'IW_BundleUid'	'63e8d22f-4d29-4b63-9199-e78ae3a43f85'
	AttributeExtensions	[2] 00 00..
	AttributeLocation	''
	AttributeOtherDN	'1003'
	AttributeMakeCallType	0 (MakeCallRegular)
19:34:19.791 Int 04543 Interaction message "RequestMakeCall" received from 224 ("WorkspaceDesktop_2004")
@19:34:19.7910 [ISCC] destination_location substituted by local
@19:34:19.7910 [ISCC] destination_location substituted by local
19:34:19.791  -- created: CRequest@30e9090 RequestMakeCall-WorkspaceDesktop_2004[224]/13
19:34:19.791: $+TLIB:CTI:Unknown:0:5375165612
19:34:19.791 +++ CIFace::Request +++
   -- new invoke
  Parsed: RequestMakeCall
  From: WorkspaceDesktop_2004[224]/13
  Numbers: +<1004> +<1003>
  Status: parsed:1 queued:0 sent:0 acked:0 preevent:0 event:0 context:0 transferred:0
  -----
   -- validate
   -- state check: ok
  CIFace: Sent CRequest@30e9090 RequestMakeCall-WorkspaceDesktop_2004[224]/13
  FinishRequest CRequest@30e9090 RequestMakeCall-WorkspaceDesktop_2004[224]/13
   IFace stats: q=0 s=0
   -- complete
19:34:19.791: Number: 1004 : checking for a softswitch configuration
19:34:19.791: Number:1004 did not find any softswitch with matching prefix to send this call to
19:34:19.791: Unable to resolve number for DN:1004
19:34:19.791: SIPDM: failed to get registration info for 1004
19:34:19.791: SIPDM: failed to get registration info for 1004
19:34:19.791: COS:MakeCall: request from 1004 to 1003 is rejected by dial plan
  Response (61): for CRequest@30e9090 RequestMakeCall-WorkspaceDesktop_2004[224]/13
19:34:19.791 Trc 36002 Request rejected: error code 61(Invalid Calling Dn)
@19:34:19.7910 [0] 8.1.101.34 send_to_client: message EventError
	(Invalid Calling Dn)
	AttributeEventSequenceNumber	0000000000000158
	AttributeTimeinuSecs	791000
	AttributeTimeinSecs	1436969059 (19:34:19)
	AttributeExtensions	[2] 00 00..
	AttributeErrorCode	61
	AttributeErrorMessage	'Invalid Calling Dn'
	AttributeMakeCallType	0 (MakeCallRegular)
	AttributeOtherDN	'1003'
	AttributeLocation	''
	AttributeUserData	[106] 00 02 00 00..
		'IW_CaseUid'	'306ca7d8-41e1-4ba6-8f3f-f0857cfb9f55'
		'IW_BundleUid'	'63e8d22f-4d29-4b63-9199-e78ae3a43f85'
	AttributeThisDN	'1004'
	AttributeReferenceID	13
	AttributeClientID	12
19:34:19.791 Int 04545 Interaction message "EventError" sent to 224 ("WorkspaceDesktop_2004")
19:34:19.791 Trc 04542 EventError sent to [224] (0000000c WorkspaceDesktop_2004 192.168.3.43:54877)
  FinishRequest: second time for CRequest@30e9090 RequestMakeCall-WorkspaceDesktop_2004[224]/13
19:34:19.791: ERROR: 20000007, GetSipTServerCall(request,call), SipTServer.cpp,864
19:34:19.791: ERROR: 20000007, GetSipTServerCallParty(request,call,party), SipTServerAcdService.cpp,3873
19:34:19.791 --- CIFace::Request ---
19:34:19.791  -- deleted: CRequest@30e9090 RequestMakeCall-WorkspaceDesktop_2004[224]/13
19:34:19.791: $-TLIB:CTI:Unknown:0:318
Can some check where the issue might be