H.323 phones drop 911 call when the PSAP answers 1

Alfordap · Jun 3, 2020

Running Aura SM 7.1. We recently found that when an H.323 phone dials 911 the call drops the instant the PSAP picks up the call. SIP calls complete without a problem. We have run traces on both SIP and H.323 calls to 911 and they look the same. We have called the PSAP and they confirm that they see the call from an H.323 phone come in but that it drops the second they pick it up. Any ideas on where to start looking?

kyle555 · Jun 3, 2020

SIP trace!

Alfordap · Jun 3, 2020

This is a successful 911 call from a SIP phone
Sorry for the weird characters Putty does that in the log. Also I had obscure the whole 10 digit phone number, domains and the IP address but the rest of it is complete. I will post an H.323 failed trace next.

[7;0H11:23:57 TRACE STARTED 06/03/2020 CM Release String cold-01.0.532.0-24515

[8;0H11:24:02 SIP<INVITE sips:61800@xxx.xxx;avaya-cm-fnu=off-hook SIP/2.0

[9;0H11:24:02 Call-ID: 26_5ed7dcb1777c46fa5lm6gr3jk4v5w1o6a3t1u_I6180

[10;0H11:24:02 0

[11;0H11:24:02 SIP>SIP/2.0 183 Session Progress

[12;0H11:24:02 Call-ID: 26_5ed7dcb1777c46fa5lm6gr3jk4v5w1o6a3t1u_I6180

[13;0H11:24:02 0

[14;0H11:24:02 SIP>PUBLISH sips:61800@xxx.xxx SIP/2.0

[15;0H11:24:02 Call-ID: 495705ea5bf41ea80f80c2935b8a5

[16;0H11:24:02 Calling party uses private-numbering

[17;0H11:24:02 SIP<SIP/2.0 200 OK

[18;0H11:24:02 Call-ID: 495705ea5bf41ea80f80c2935b8a5

[19;0H11:24:07 SIP>SIP/2.0 484 Address Incomplete

[20;0H11:24:07 Call-ID: 26_5ed7dcb1777c46fa5lm6gr3jk4v5w1o6a3t1u_I6180

[21;0H11:24:07 0

7[23;0H[0;7m [0m[23;0H[23;0H[0;7m[0;7m press CANCEL to quit -- press NEXT PAGE to continue[0m87[25;1H[0;7mF1=Cancel F2=Refresh F3=Submit F4=Clr Fld F5=Help F6=Update F7=Nxt Pg F8=Prv Pg [0m8[23;0H[0;7m [0m[23;0H[2;1H[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B7[1;65H[0;7m Page 2[0m8[3;1H[3;33HLIST TRACE

[5;0Htime data

[6;0H11:24:07 SIP<INVITE sips:911@xxx.xxx SIP/2.0

[7;0H11:24:07 Call-ID: 26_5ed7dcb1777c46fa5lm6gr3jk4v5w1o6a3t1u_I6180

[8;0H11:24:07 0

[9;0H11:24:07 SIP>SIP/2.0 100 Trying

[10;0H11:24:07 Call-ID: 26_5ed7dcb1777c46fa5lm6gr3jk4v5w1o6a3t1u_I6180

[11;0H11:24:07 0

[12;0H11:24:07 dial 911# route:ARS

[13;0H11:24:07 term trunk-group 700 cid 0x3af5

[14;0H11:24:07 dial 911# route:ARS

[15;0H11:24:07 route-pattern 30 preference 1 location 10 cid 0x3af5

[16;0H11:24:07 seize trunk-group 700 member 135 cid 0x3af5

[17;0H11:24:07 Calling Number & Name 61800 SIP TEST

[18;0H11:24:07 INVITE going via Sig Grp 600, ignoring called number routing

[19;0H11:24:07 SIP>INVITE sips:95555551@xxx.xxx SIP/2.0

[20;0H11:24:07 Call-ID: 7f55782a5bf41ea8170c2935b8a5

[21;0H11:24:07 Setup digits 95555551

7[23;0H[0;7m [0m[23;0H[23;0H[0;7m[0;7m press CANCEL to quit -- press NEXT PAGE to continue[0m87[25;1H[0;7mF1=Cancel F2=Refresh F3=Submit F4=Clr Fld F5=Help F6=Update F7=Nxt Pg F8=Prv Pg [0m8[23;0H[0;7m [0m[23;0H[2;1H[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B7[1;65H[0;7m Page 3[0m8[3;1H[3;33HLIST TRACE

[5;0Htime data

[6;0H11:24:07 Calling Number & Name +xxxxxx61800 SIP TEST

[7;0H11:24:07 SIP<ACK sips:61800@xxx.xxx;avaya-cm-fnu=off-hook SIP/2.0

[8;0H11:24:07 Call-ID: 26_5ed7dcb1777c46fa5lm6gr3jk4v5w1o6a3t1u_I6180

[9;0H11:24:07 0

[10;0H11:24:07 SIP<SIP/2.0 100 Trying

[11;0H11:24:07 Call-ID: 7f55782a5bf41ea8170c2935b8a5

[12;0H11:24:07 Proceed trunk-group 700 member 135 cid 0x3af5

[13;0H11:24:07 SIP<SIP/2.0 480 SIPS Not Allowed

[14;0H11:24:07 Call-ID: 7f55782a5bf41ea8170c2935b8a5

[15;0H11:24:07 SIP>ACK sips:95555551@xxx.xxx SIP/2.0

[16;0H11:24:07 Call-ID: 7f55782a5bf41ea8170c2935b8a5

[17;0H11:24:09 SIP>SIP/2.0 180 Ringing

[18;0H11:24:09 Call-ID: 26_5ed7dcb1777c46fa5lm6gr3jk4v5w1o6a3t1u_I6180

[19;0H11:24:09 0

[20;0H11:24:09 Alert trunk-group 700 member 135 cid 0x3af5

[21;0H11:24:09 G711MU ss

ff ps:20

7[23;0H[0;7m [0m[23;0H[23;0H[0;7m[0;7m press CANCEL to quit -- press NEXT PAGE to continue[0m87[25;1H[0;7mF1=Cancel F2=Refresh F3=Submit F4=Clr Fld F5=Help F6=Update F7=Nxt Pg F8=Prv Pg [0m8[23;0H[0;7m [0m[23;0H[2;1H[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B7[1;65H[0;7m Page 4[0m8[3;1H[3;33HLIST TRACE

[5;0Htime data

[6;0H rgn:241 [10.abc.abc.201]:5254

[7;0H rgn:10 [10.xyz.xyz.42]:2052

[8;0H11:24:09 xoip options: fax:T38 modem

T tty:US uid:0x50c5f

[9;0H xoip ip: [10.xyz.xyz.42]:2052

[10;0H11:24:09 G711MU ss

ff ps:20

[11;0H rgn:10 [10.xyz.xyz.120]:5004

[12;0H rgn:10 [10.xyz.xyz.42]:2062

[13;0H11:24:09 xoip options: fax:T38 modem

T tty:US uid:0x501d4

[14;0H xoip ip: [10.xyz.xyz.42]:2062

[15;0H11:24:09 SIP<PRACK sips:95555551@10.cky.cky.30 SIP/2.0

[16;0H11:24:09 Call-ID: 26_5ed7dcb1777c46fa5lm6gr3jk4v5w1o6a3t1u_I6180

[17;0H11:24:09 0

[18;0H11:24:09 SIP>SIP/2.0 200 OK

[19;0H11:24:09 Call-ID: 26_5ed7dcb1777c46fa5lm6gr3jk4v5w1o6a3t1u_I6180

[20;0H11:24:09 0

[21;0H11:24:13 SIP>PUBLISH sips:61800@xxx.xxx SIP/2.0

7[23;0H[0;7m [0m[23;0H[23;0H[0;7m[0;7m press CANCEL to quit -- press NEXT PAGE to continue[0m87[25;1H[0;7mF1=Cancel F2=Refresh F3=Submit F4=Clr Fld F5=Help F6=Update F7=Nxt Pg F8=Prv Pg [0m8[23;0H[0;7m [0m[23;0H[2;1H[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B7[1;65H[0;7m Page 5[0m8[3;1H[3;33HLIST TRACE

[5;0Htime data

[6;0H11:24:13 Call-ID: b865310a5bf41ea812c0c2935b8a5

[7;0H11:24:13 SIP>SIP/2.0 200 OK

[8;0H11:24:13 Call-ID: 26_5ed7dcb1777c46fa5lm6gr3jk4v5w1o6a3t1u_I6180

[9;0H11:24:13 0

[10;0H11:24:13 active trunk-group 700 member 135 cid 0x3af5

[11;0H11:24:13 SIP<SIP/2.0 200 OK

[12;0H11:24:13 Call-ID: b865310a5bf41ea812c0c2935b8a5

[13;0H11:24:13 SIP<ACK sips:95555551@10.cky.cky.30 SIP/2.0

[14;0H11:24:13 Call-ID: 26_5ed7dcb1777c46fa5lm6gr3jk4v5w1o6a3t1u_I6180

[15;0H11:24:13 0

[16;0H11:24:14 SIP>INVITE sips:61800@10.xyz.xyz.120:23010;transport=tls;gsi

[17;0H11:24:14 SIP>d=0494ab10-a5bf-11ea-bdd7-000c29701eb9;av-iptol SIP/2.0

[18;0H11:24:14 Call-ID: 26_5ed7dcb1777c46fa5lm6gr3jk4v5w1o6a3t1u_I6180

[19;0H11:24:14 0

[20;0H11:24:14 SIP<SIP/2.0 100 Trying

[21;0H11:24:14 Call-ID: 26_5ed7dcb1777c46fa5lm6gr3jk4v5w1o6a3t1u_I6180

7[23;0H[0;7m [0m[23;0H[23;0H[0;7m[0;7m press CANCEL to quit -- press NEXT PAGE to continue[0m87[25;1H[0;7mF1=Cancel F2=Refresh F3=Submit F4=Clr Fld F5=Help F6=Update F7=Nxt Pg F8=Prv Pg [0m8[23;0H[0;7m [0m[23;0H[2;1H[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B7[1;65H[0;7m Page 6[0m8[3;1H[3;33HLIST TRACE

[5;0Htime data

[6;0H11:24:14 0

[7;0H11:24:14 SIP<SIP/2.0 200 OK

[8;0H11:24:14 Call-ID: 26_5ed7dcb1777c46fa5lm6gr3jk4v5w1o6a3t1u_I6180

[9;0H11:24:14 0

[10;0H11:24:14 SIP>ACK sips:61800@10.rts.rts.x:23010;transport=tls;gsid=0

[11;0H11:24:14 SIP>494ab10-a5bf-11ea-bdd7-000c29701eb9 SIP/2.0

[12;0H11:24:14 Call-ID: 26_5ed7dcb1777c46fa5lm6gr3jk4v5w1o6a3t1u_I6180

[13;0H11:24:14 0

[14;0H11:24:28 SIP<BYE sips:95555551@10.cky.cky.30 SIP/2.0

[15;0H11:24:28 Call-ID: 26_5ed7dcb1777c46fa5lm6gr3jk4v5w1o6a3t1u_I6180

[16;0H11:24:28 0

[17;0H11:24:28 SIP>SIP/2.0 200 OK

[18;0H11:24:28 Call-ID: 26_5ed7dcb1777c46fa5lm6gr3jk4v5w1o6a3t1u_I6180

[19;0H11:24:28 0

[20;0H11:24:28 SIP>PUBLISH sips:61800@xxx.xxx SIP/2.0

[21;0H11:24:28 Call-ID: 1445e5f6a5bf41ea81450c2935b8a5

7[23;0H[0;7m [0m[23;0H[23;0H[0;7m[0;7m press CANCEL to quit -- press NEXT PAGE to continue[0m87[25;1H[0;7mF1=Cancel F2=Refresh F3=Submit F4=Clr Fld F5=Help F6=Update F7=Nxt Pg F8=Prv Pg [0m8[23;0H[0;7m [0m[23;0H[2;1H[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B7[1;65H[0;7m Page 7[0m8[3;1H[3;33HLIST TRACE

[5;0Htime data

[6;0H11:24:28 idle station 61800 cid 0x3af5

[7;0H11:24:46 TRACE COMPLETE station 61800 cid 0x0

7[23;0H[0;7m [0m[23;0H[23;0H[0;7m[0;7mCommand successfully completed[0m87[25;1H[0;7mF1=Cancel F2=Refresh F3=Submit F4=Clr Fld F5=Help F6=Update F7=Nxt Pg F8=Prv Pg [0m87[1;65H[0;7m [0m8[24;1H[KCommand: logoff[2;1H[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[23;0H[0;7m [0m[23;0H7[1;0H[0;7m [0m8[2;1H[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[10;40H

*** Busied out resource detected; verify if release is needed! ***

[12;40H

Alfordap · Jun 3, 2020

Here is a failed H.323 call
Sorry for the weird characters Putty does that in the log. Also I had obscure the whole 10 digit phone number, domains and the IP address but the rest of it is complete.

[7;0H11:42:23 TRACE STARTED 06/03/2020 CM Release String cold-01.0.532.0-24515

[8;0H11:42:25 G711MU ss

ff ps:20

[9;0H rgn:250 [10.abc.abc.94]:4250

[10;0H rgn:2 [10.zzz.zzz.44]:2060

[11;0H11:42:29 short inter-digit delay due to overlapping entries cid 0x300

[12;0H11:42:29 dial 911# route:ARS

[13;0H11:42:29 term trunk-group 700 cid 0x300

[14;0H11:42:29 dial 911# route:ARS

[15;0H11:42:29 route-pattern 30 preference 1 location 1 cid 0x300

[16;0H11:42:29 seize trunk-group 700 member 136 cid 0x300

[17;0H11:42:29 Calling Number & Name 61913 H323 TEST PHO

[18;0H11:42:29 SIP>INVITE sips:95555551@xxx.xxx SIP/2.0

[19;0H11:42:29 Call-ID: 984da788a5c141ea86c80c2935b8a5

[20;0H11:42:29 Setup digits 95555551

[21;0H11:42:29 Calling Number & Name +xxxxx61913 H323 TEST PHO

7[23;0H[0;7m [0m[23;0H[23;0H[0;7m[0;7m press CANCEL to quit -- press NEXT PAGE to continue[0m87[25;1H[0;7mF1=Cancel F2=Refresh F3=Submit F4=Clr Fld F5=Help F6=Update F7=Nxt Pg F8=Prv Pg [0m8[23;0H[0;7m [0m[23;0H[2;1H[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B7[1;65H[0;7m Page 2[0m8[3;1H[3;33HLIST TRACE

[5;0Htime data

[6;0H11:42:29 Calling party uses public-unknown-numbering

[7;0H11:42:29 SIP<SIP/2.0 100 Trying

[8;0H11:42:29 Call-ID: 984da788a5c141ea86c80c2935b8a5

[9;0H11:42:29 Proceed trunk-group 700 member 136 cid 0x300

[10;0H11:42:29 SIP<SIP/2.0 480 SIPS Not Allowed

[11;0H11:42:29 Call-ID: 984da788a5c141ea86c80c2935b8a5

[12;0H11:42:29 SIP>ACK sips:95555551@xxx.xxx SIP/2.0

[13;0H11:42:29 Call-ID: 984da788a5c141ea86c80c2935b8a5

[14;0H11:42:30 Alert trunk-group 700 member 136 cid 0x300

[15;0H11:42:30 G711MU ss

ff ps:20

[16;0H rgn:241 [10..ccc.ccc.201]:5260

[17;0H rgn:2 [10..ggg.ggg.44]:2072

[18;0H11:42:30 xoip options: fax:T38 modem

T tty:US uid:0x50c60

[19;0H xoip ip: [10..ggg.ggg.44]:2072

[20;0H11:42:35 active trunk-group 700 member 136 cid 0x300

[21;0H11:42:35 idle trunk-group 700 member 136 cid 0x300

7[23;0H[0;7m [0m[23;0H[23;0H[0;7m[0;7m press CANCEL to quit -- press NEXT PAGE to continue[0m87[25;1H[0;7mF1=Cancel F2=Refresh F3=Submit F4=Clr Fld F5=Help F6=Update F7=Nxt Pg F8=Prv Pg [0m87[25;1H[0;7mF1=Cancel F2=Refresh F3=Submit F4=Clr Fld F5=Help F6=Update F7=Nxt Pg F8=Prv Pg [0m87[1;1H[0;7mlist trace station 61913 [0m87[23;0H[0;7m [0m[23;0H[23;0H[0;7m[0;7mCommand aborted[0m87[1;65H[0;7m [0m8[24;1H[KCommand: logoof[2;1H[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[23;0H[0;7m [0m[23;0H7[1;0H[0;7m [0m87[23;0H[0;7m [0m[23;0H[23;0H[0;7m[0;7m"logoof" is an invalid entry; please press HELP[0m8[24;1H[KCommand: logoff[23;0H[0;7m [0m[23;0H[2;1H[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[K[B[10;40H

*** Busied out resource detected; verify if release is needed! ***

kyle555 · Jun 3, 2020

sounds like you got secure SIP enabled in your route pattern and you have a TCP link somewhere along the way like SM to SBC

try a dedicated route pattern to test with secure sip at no

Alfordap · Jun 3, 2020

Kyle, thanks we will give it a try and report back.

Alfordap · Jun 3, 2020

Kyle,

The route pattern for our 911 calls (30) has secure SIP turned off already and we do not an SBC?

Pattern Number: 30 Pattern Name: 911 Route
SCCAN? n Secure SIP? n Used for SIP stations? n

Grp FRL NPA Pfx Hop Toll No. Inserted DCS/ IXC
No Mrk Lmt List Del Digits QSIG
Dgts Intw
1: 700 0 9 n user
2: 601 0 9 n user
3: 602 0 9 n user
4: 603 0 9 n user
5: 604 0 9 n user
6: 605 0 9 n user

BCC VALUE TSC CA-TSC ITC BCIE Service/Feature PARM Sub Numbering LAR
0 1 2 M 4 W Request Dgts Format
1: y y y y y n n rest next
2: y y y y y n n rest next
3: y y y y y n n rest next
4: y y y y y n n rest next
5: y y y y y n n rest next
6: y y y y y n n rest none

kyle555 · Jun 3, 2020

You got a 480 SIPS not allowed in your failed h323 trace

Look up "SIPS Not Allowed" in this RFC

https://tools.ietf.org/id/draft-ietf-sip-sips-09.html

Basically, if you're doing encrypted voice, you pass the encryption key for the RTP stream in SIP signaling.

The SIPS URI scheme says that a proxy should refuse the call if it would pass over a TCP link. If the signaling passed over a TCP link and your RTP encryption key was in there, someone could sniff that key and eavesdrop on your call.

So, SIPS Not Allowed means you're trying to do something secure over a TCP link and not a TLS link somewhere along the chain.

If your call terminates as soon as it's answered, then the problem isn't about getting the call from point A to point B, it's about making sure point A and point B are compatible and security/encryption seems to be involved in your issue.

Alfordap · Jun 4, 2020

We got it fixed! We had to change Signaling Group 700 (our 911 trunk) "Enforce SIPS URI for SRTP?" to NO from YES. Thank you for your help Kyle.

phoneguy55 · Jun 5, 2020

Stars for Kyle. Thats good troubleshooting.

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H.323 phones drop 911 call when the PSAP answers 1

Alfordap

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kyle555

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Alfordap

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Alfordap

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kyle555

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Alfordap

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Alfordap

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kyle555

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Alfordap

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phoneguy55

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