We are beginning to get some success with inbound calls on an ITU SS7 inter-machine trunk on a Siemens switch in Pakistan. An inbound call is one that originates from the PSTN and terminates on the signal/media gateway (SMG). In the output below we see that a message code of 0x05 came in which is ignored. This is the switch requesting a continuity test which is not supported yet.
Some inbound calls are released by the switch because of "unavailable resources". This is probably a transient condition resulting from circuit group unblocking messages from the switch being ignored by the SMG. A remedy for this problem will be available shortly.
S:mtp3_smh.c:print_msu:
SI 0x05 PRIO 0x0 NI 0x2
dpc 3000 opc 4424 sls 10
MARK < >
-------------------------------------------------------------------------
0000 e2 f1 3f 85 b8 0b 52 a4 - 1a 00 01 18 20 01 0a 00 ..?...R..... ...
0010 02 09 07 03 90 24 02 40 - 99 f9 0a 07 83 11 24 02 .....$.@......$.
0020 90 10 08 31 02 00 be 3d - 01 1e a4 0e 03 02 00 00 ...1...=........
0030 03 a4 20 00 05 38 38 85 - 10 74 1d 03 80 90 a3 39 .. ..88..t.....9
0040 06 a4 c0 31 c0 3d c0 00 - 5b a9 ...1.=..[.
-------------------------------------------------------------------------
--------> rmt addr: 127.0.0.43 rmt port: 50220
I:../common/udp_sockets.c:check_udp_socket:received a msg:length/function follow:88:1
I:sb_sg_sm.c:discrim_sgw_msg:MARK:0
I:sb_sg_sm.c:handle_m3ua_x4_msg:MARK:0
I:sb_sprc.c:sprc_inbound:MARK:0
I:msu_decode.c:msu_decode:MARK:0
I:msu_decode.c:handle_m3ua_isup_transfer_msg:MARK:0
CIC: 26
MSG TYPE: IAM
NATURE OF CONNECTION INDICATORS:
SATELLITE INDICATOR: 0x00
CONTINUITY CHECK INDICATOR: 0x02
ECHO CONTROL DEVICE INDICATOR: 0x01
FORWARD CALL INDICATORS:
INCOMING INTL CALL IND: 0x00
END TO END METHOD IND: 0x00
INTERWORKING IND: 0x00
END-TO-END INFORMATION IND: 0x00
ISDN USER_PART IND: 0x01
ISDN USER_PART PREFERENCE IND: 0x00
ISDN ACCESS IND: 0x01
SCCP METHOD IND: 0x00
SPARE: 0x00
RESERVED: 0x00
CALLING PARTY CATEGORY: 0x0a
TRANSMISSION MEDIUM REQUIREMENT: 0x00 (TMR interpretation not coded yet)
MANDATORY VLP:
NAME: CALLED PARTY NUMBER
LENGTH: 7
OCTET 0: 0x03
OCTET 1: 0x90
OCTET 2: 0x24
OCTET 3: 0x02
OCTET 4: 0x40
OCTET 5: 0x99
OCTET 6: 0xf9
---CdPA/CgPA DECODE---
NUMBER OF DIALED DIGITS: 10
NATURE OF ADDRESS INDICATOR: 0x03
SCREENING INDICATOR: 0x00
ADDRESS PRESENTATION INDICATOR: 0x00
NUMBERING PLAN: 0x01
DIALED DIGITS: 42200499915
OPTIONAL PARAMETERS - BEGIN
OPTIONAL VLP:
NAME VALUE: 0x0a - CALLING PARTY ADDRESS
LENGTH: 7
OCTET 0: 0x83
OCTET 1: 0x11
OCTET 2: 0x24
OCTET 3: 0x02
OCTET 4: 0x90
OCTET 5: 0x10
OCTET 6: 0x08
---CdPA/CgPA DECODE---
NUMBER OF DIALED DIGITS: 9
NATURE OF ADDRESS INDICATOR: 0x03
SCREENING INDICATOR: 0x01
ADDRESS PRESENTATION INDICATOR: 0x00
NUMBERING PLAN: 0x01
DIALED DIGITS: 422009018
OPTIONAL VLP:
NAME VALUE: 0x31 - PROPAGATION DELAY COUNTER
LENGTH: 2
OCTET 0: 0x00
OCTET 1: 0xbe
(No decode for this ISUP parameter)
OPTIONAL VLP:
NAME VALUE: 0x3d - HOP COUNTER
LENGTH: 1
OCTET 0: 0x1e
(No decode for this ISUP parameter)
OPTIONAL VLP:
NAME VALUE: 0xa4 - (parm name string not defined)
LENGTH: 14
OCTET 0: 0x03
OCTET 1: 0x02
OCTET 2: 0x00
OCTET 3: 0x00
OCTET 4: 0x03
OCTET 5: 0xa4
OCTET 6: 0x20
OCTET 7: 0x00
OCTET 8: 0x05
OCTET 9: 0x38
OCTET 10: 0x38
OCTET 11: 0x85
OCTET 12: 0x10
OCTET 13: 0x74
(No decode for this ISUP parameter)
OPTIONAL VLP:
NAME VALUE: 0x1d - (parm name string not defined)
LENGTH: 3
OCTET 0: 0x80
OCTET 1: 0x90
OCTET 2: 0xa3
(No decode for this ISUP parameter)
OPTIONAL VLP:
NAME VALUE: 0x39 - PARAMETER COMPATIBILITY INFORMATION
LENGTH: 6
OCTET 0: 0xa4
OCTET 1: 0xc0
OCTET 2: 0x31
OCTET 3: 0xc0
OCTET 4: 0x3d
OCTET 5: 0xc0
(No decode for this ISUP parameter)
OPTIONAL PARAMETERS - END
I:sb_toolbox.c:find_trunk_group:MARK:0
tg 0
I:sb_toolbox.c:convert_cic_to_span_chan:MARK:0
cic 26 cic_base 1 ncic 25 span 0 chan 26
I:sb_sg_cpc.c:sg_cpc:MARK:0
I:span 0 chan 26 tg 0 cic 26 sls 5 nd 10 cld 422004999? ng 9 clg 422009018 spc 3000 imt_pc 4424
I:sb_sg_cpc.c:sg_cpc_idle:MARK:0
I:sb_send_sigboost.c:send_call_start_to_mg:MARK:0
I:span 0 chan 26 tg 0 cic 26 sls 4 nd 10 cld 422004999? ng 9 clg 422009018 spc 3000 imt_pc 4424
I:sb_send_isup.c:send_acm_to_ss7box:MARK:0
I:span 0 chan 26 tg 0 cic 26 sls 4 nd 10 cld 422004999? ng 9 clg 422009018 spc 3000 imt_pc 4424
I:isup_event.c:send_canned_acm:MARK:0
Message from A/S, vlph_len 22 asmlen 6
0x1a 0x00 0x06 0x14 0x10 0x00
S:mtp3_smh.c:print_msu:
SI 0x05 PRIO 0x1 NI 0x2
dpc 4424 opc 3000 sls 4
MARK < >
-------------------------------------------------------------------------
0000 e2 f1 3f 95 48 11 ee 42 - 1a 00 06 14 10 00 0a 00 ..?.H..B........
-------------------------------------------------------------------------
I:../common/udp_sockets.c:check_udp_socket:received a msg:length/function follow:96:131
I:sb_mg_sm.c:discrim_mgw_msg:MARK:0
I:sb_mg_cpc.c:mg_cpc:MARK:0
I:span 0 chan 26 tg 0 cic 26 sls 4 nd 10 cld 422004999? ng 9 clg 422009018 spc 3000 imt_pc 4424
I:sb_mg_cpc.c:mg_cpc_inb_wait_ans:MARK:0
I:sb_send_isup.c:send_ans_to_ss7box:MARK:0
I:span 0 chan 26 tg 0 cic 26 sls 4 nd 10 cld 422004999? ng 9 clg 422009018 spc 3000 imt_pc 4424
I:isup_event.c:send_canned_ans:MARK:0
Message from A/S, vlph_len 20 asmlen 4
0x1a 0x00 0x09 0x00
S:mtp3_smh.c:print_msu:
SI 0x05 PRIO 0x1 NI 0x2
dpc 4424 opc 3000 sls 4
MARK < >
-------------------------------------------------------------------------
0000 e2 f1 3f 95 48 11 ee 42 - 1a 00 09 00 10 00 ..?.H..B......
-------------------------------------------------------------------------
S:mtp3_smh.c:print_msu:
SI 0x05 PRIO 0x0 NI 0x2
dpc 3000 opc 4424 sls 10
MARK < >
-------------------------------------------------------------------------
0000 e3 f2 09 85 b8 0b 52 a4 - 1a 00 05 01 9b 23 ......R......#
-------------------------------------------------------------------------
--------> rmt addr: 127.0.0.43 rmt port: 50220
I:../common/udp_sockets.c:check_udp_socket:received a msg:length/function follow:28:1
I:sb_sg_sm.c:discrim_sgw_msg:MARK:0
I:sb_sg_sm.c:handle_m3ua_x4_msg:MARK:0
I:sb_sprc.c:sprc_inbound:MARK:0
I:msu_decode.c:msu_decode:MARK:0
I:msu_decode.c:handle_m3ua_isup_transfer_msg:MARK:0
CIC: 26
MSG TYPE: 0x05 (print decode for this message type not developed yet)
W:msu_decode.c:handle_m3ua_isup_transfer_msg:ISUP message type not decodable yet:msg type follows:5
W:sb_sprc.c:sprc_inbound:msu_decode failed: ignore following value:0
I:../common/udp_sockets.c:check_udp_socket:received a msg:length/function follow:96:132
I:sb_mg_sm.c:discrim_mgw_msg:MARK:0
I:sb_mg_cpc.c:mg_cpc:MARK:0
I:span 0 chan 26 tg 0 cic 26 sls 4 nd 10 cld 422004999? ng 9 clg 422009018 spc 3000 imt_pc 4424
I:sb_mg_cpc.c:mg_cpc_inb_icc_answered:MARK:0
I:sb_send_isup.c:send_rel_to_ss7box:MARK:0
I:span 0 chan 26 tg 0 cic 26 sls 4 nd 10 cld 422004999? ng 9 clg 422009018 spc 3000 imt_pc 4424
I:isup_event.c:send_canned_rel:MARK:0
Message from A/S, vlph_len 21 asmlen 5
0x1a 0x00 0x0c 0x02 0x00
S:mtp3_smh.c:print_msu:
SI 0x05 PRIO 0x1 NI 0x2
dpc 4424 opc 3000 sls 4
MARK < >
-------------------------------------------------------------------------
0000 e3 f2 09 95 48 11 ee 42 - 1a 00 0c 02 00 23 0a ....H..B.....#.
-------------------------------------------------------------------------
S:mtp3_smh.c:print_msu:
SI 0x05 PRIO 0x0 NI 0x2
dpc 3000 opc 4424 sls 10
MARK < >
-------------------------------------------------------------------------
0000 e5 f3 09 85 b8 0b 52 a4 - 1a 00 10 00 67 8b ......R.....g.
-------------------------------------------------------------------------
--------> rmt addr: 127.0.0.43 rmt port: 50220
I:../common/udp_sockets.c:check_udp_socket:received a msg:length/function follow:28:1
I:sb_sg_sm.c:discrim_sgw_msg:MARK:0
I:sb_sg_sm.c:handle_m3ua_x4_msg:MARK:0
I:sb_sprc.c:sprc_inbound:MARK:0
I:msu_decode.c:msu_decode:MARK:0
I:msu_decode.c:handle_m3ua_isup_transfer_msg:MARK:0
CIC: 26
MSG TYPE: RLC
I:sb_toolbox.c:find_trunk_group:MARK:0
tg 0
I:sb_toolbox.c:convert_cic_to_span_chan:MARK:0
cic 26 cic_base 1 ncic 25 span 0 chan 26
I:sb_sg_cpc.c:sg_cpc:MARK:0
I:span 0 chan 26 tg 0 cic 26 sls 4 nd 10 cld 422004999? ng 9 clg 422009018 spc 3000 imt_pc 4424
I:sb_sg_cpc.c:sg_cpc_inb_wait_rlc:MARK:0
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