NEC SV9100 cannot dial some internals phones randomly

[Chronoxygene]

I have NEC SV9100 with F3P phones. Suddenly some phones when call them internally not ring, phone caller receive busy call (phone destination is free, can dial but not receive call). When restart work fine some time but return to busy status for other phones calling them.

In debug mode show when calling from 523 to 535:

read_s_siptrunk_e164_mode() trk_prof= f over TRK_PROF_MAX
== 20/MAY/2022, 10:41:19 ==
*(EVENT),ID:00000323H,P1:00000000H,P2:00000072H,P3:115A6AD4H
R ISDN : <<<<<<<<<<<<<<<<
26 0B A1 04 01 01 00 USL(0,0),SETUP IND
08 02 01 E3 05 Callref:ORG(483),SETUP
04 03 80 90 A3 Bearer capability [speech]
18 01 AB Channel identification
28 03 35 32 33 Display [523]
6C 05 00 80 35 32 33 Calling party number [523]
70 04 80 35 33 35 Called party number [535]
temp_call_ref:8000H,
..... 00D80072(0000-0000) 0983
port_w = d80072 , IP status : IPS_CALL_INIT
This is TX message for SIP/H.323 Station...
S ISDN : >>>>>>>>>>>>>>>>
0B A1 02 01 01 00 USL(0,1),PROCEEDING REQ
08 02 81 E3 02 CallrefES(483),CALL PROCEEDING
>>>> PORT:00D80072H STATUS 0000H => 0002H
*(EVENT),ID:00000000H,P1:00D80072H,P2:00000000H,P3:00000001H
>>>> PORT:00D80072H STATUS 0002H => 000FH
*(EVENT),ID:00000000H,P1:00D80072H,P2:00000000H,P3:00000001H
*(EVENT),ID:00000000H,P1:00D80072H,P2:00000000H,P3:00000001H
Enter station_access_2w(Port=D80072H,Des=7EH)
station_access_2w(): sta_logic_port() SRC80072H DES D8007EH HOLD:0
>>>> PORT:00D80072H STATUS 000FH => 0013H
*(INTER),ID:00D80072H,P1:00D8007EH,P2:00000000H,P3:00000801H
*** ring_tone_req (L8007E,P:3,T:0,D80072) ***
SP_GET_CALLING_PARTY_NUMBER:FAULT task_info.data_w is 0
This is TX message for SIP/H.323 Station...
S ISDN : >>>>>>>>>>>>>>>>
22 A1 04 01 01 00 USL(0,1),SETUP REQ
08 02 02 34 05 Callref:ORG(564),SETUP
04 03 80 90 A3 Bearer capability [speech]
28 03 35 32 33 Display [523]
6C 05 00 83 35 32 33 Calling party number [523]
70 04 81 35 33 35 Called party number [535]
>>>> PORT:00D8007EH STATUS 0000H => 000DH
*(INTER),ID:00D8007EH,P1:00D80072H,P2:00000000H,P3:00000802H
>>>> PORT:00D80072H STATUS 0013H => 0004H
*(EVENT),ID:0000001FH,P1:00001102H,P2:00000000H,P3:00000000H
*(EVENT),ID:00000323H,P1:00000000H,P2:0000007EH,P3:115A6AD4H
R ISDN : <<<<<<<<<<<<<<<<
0C 0B A1 02 01 01 00 USL(0,0),CALL PROCEEDING IND
08 02 82 34 02 CallrefES(564),CALL PROCEEDING
..... 00D8007E(000D-D80072) 0981
port_w = d8007e , IP status : IPS_CALL_PRESENT
== 20/MAY/2022, 10:41:20 ==
*(EVENT),ID:00000323H,P1:00000000H,P2:0000007EH,P3:115A6AD4H
R ISDN : <<<<<<<<<<<<<<<<
10 0B A1 09 01 01 00 USL(0,0),DISCONNECT IND
08 02 82 34 45 CallrefES(564),DISCONNECT
08 02 80 90 Cause (16)
..... 00D8007E(000D-D80072) 0988
port_w = d8007e , IP status : IPS_INCOM_CALL_PROC
*** ring_tone_req (L8007E,P:0,T:0,D:0) ***
port_w = d8007e , IP status : IPS_DISC_REQ
This is TX message for SIP/H.323 Station...
S ISDN : >>>>>>>>>>>>>>>>
0B A1 0C 01 01 00 USL(0,1),RELEASE REQ
08 02 02 34 4D Callref:ORG(564),RELEASE
>>>> PORT:00D8007EH STATUS 000DH => 0000H
*(INTER),ID:00D8007EH,P1:00D80072H,P2:00000000H,P3:00000804H
port_w = d80072 , IP status : IPS_OUTGO_CALL_PROC
<<< cdetect.cpp(257) new cdetector:pen() target port is d80072 >>>
<<< cdetect.cpp(352) Enter cdetector:pen(DT_DTMF,0,D80072H) >>>
<<< cdetect.cpp(580) cdetect:pen() Channel 140001H is opened for port D80072H >>>
<<< cdetect.cpp(685) Enter cdetect::connect() >>>
This is TX message for SIP/H.323 Station...
S ISDN : >>>>>>>>>>>>>>>>
0F A1 03 01 01 00 USL(1,1),PROGRESS REQ
08 02 81 E3 03 CallrefES(483),PROGRESS
1E 02 81 88 Progress indicator
>>>> PORT:00D80072H STATUS 0004H => 0007H
idetectorSub::detectorAssign idResource:0
*(INTER),ID:00D80072H,P1:00D8007EH,P2:00000032H,P3:000006B0H
<<< idetect.cpp(1000) iUnitSubDsp::detectorReport() Resource#0 Assigned >>>
*(EVENT),ID:00000030H,P1:00000000H,P2:00000000H,P3:00000001H
<<< cdetect.cpp(1118) cdetector::mail() Assigned resource#0 >>>
*(EVENT),ID:00000323H,P1:00000000H,P2:0000007EH,P3:115A6B10H
R ISDN : <<<<<<<<<<<<<<<<
0C 0B A1 33 01 01 00 USL(0,0),RELEASE CONF
08 02 82 34 5A CallrefES(564),RELEASE COMPLETE
..... 00D8007E(0000-0000) 0994
port_w = d8007e , IP status : IPS_REL_REQ
== 20/MAY/2022, 10:41:23 ==
*(EVENT),ID:00000000H,P1:00D8007EH,P2: ,P3:00000002H
out_of_range_service(SV8100) : src - D8007E, des - FFFF
== 20/MAY/2022, 10:41:24 ==
*(EVENT),ID:00000323H,P1:00000000H,P2:00000072H,P3:1163F89CH
R ISDN : <<<<<<<<<<<<<<<<
10 0B A1 09 01 01 00 USL(0,0),DISCONNECT IND
08 02 01 E3 45 Callref:ORG(483),DISCONNECT
08 02 80 90 Cause (16)
..... 00D80072(0007-D8007E) 0988
port_w = d80072 , IP status : IPS_OUTGO_CALL_PROC
<<< cdetect.cpp(612) Enter cdetector::close() >>>
<<< cdetect.cpp(724) Enter cdetect::disconnect() >>>
port_w = d80072 , IP status : IPS_DISC_REQ
This is TX message for SIP/H.323 Station...
S ISDN : >>>>>>>>>>>>>>>>
0B A1 0C 01 01 00 USL(1,1),RELEASE REQ
08 02 81 E3 4D CallrefES(483),RELEASE
>>>> PORT:00D80072H STATUS 0007H => 0000H
<<< idetect.cpp(1007) iUnitSubDsp::detectorReport() Resource#0 Released >>>
*(EVENT),ID:00000030H,P1:00000000H,P2:00000002H,P3:00000001H
<<< cdetect.cpp(1128) cdetector::mail() Released resource#0 >>>
*(EVENT),ID:00000323H,P1:00000000H,P2:00000072H,P3:115E8EF8H
R ISDN : <<<<<<<<<<<<<<<<
0C 0B A1 33 01 01 00 USL(0,0),RELEASE CONF
08 02 01 E3 5A Callref:ORG(483),RELEASE COMPLETE
..... 00D80072(0000-0000) 0994
port_w = d80072 , IP status : IPS_REL_REQ

Network work fine, all phones and SV are in same segment, F3P firmware upgrade applied (2.8.0.6291). Original Nec DT800 work fine

Any advice or procedure to resolve this problem?