5.2 Methods
5.4.2 Functional Reproducibility
A continuación se muestra la pantalla de la interfaz WinFiol utilizada para interactuar y enviar comandos en las centrales AXE Ericsson en los nodos de la red Telcel. Se puede apreciar un trazado de señalización Isup en toda la pantalla.
Cuando se obtienen estos trazados es complicado poder interpretarlos debido a que se encentran en un formato hexadecimal. Para esto se utiliza el programa C7 Decoder con el fin de tener una mejor interpretación. Se Ilustran 3 pantallas con la información de un trazado codificado.
En esta parte se muestran varios trazados de señalización obtenidos directamente en la central AXE, para ver el estado original de los mensajes.
<upmti:dev=upd-973&upd-974;
ORDERED
WO MTC03D080S*172411080176 AD-669 TIME 020515 1714 PAGE 1
ISUP MESSAGE MONITOR RESULT
USER SI CIC SP DEV CALLREF AD-669 ISUP45A 14 2-3547 UPD-974
TIME MSG DIR DATA
17:14:03:6 IAM S 85 DB 8D 91 E5 0E 00 01 04 20 00 0A 00 02 0A 08 83 90 18 38 44 59 82 0F 31 02 00 00 0A 07 03 13 18 18 63 94 74 39 02 31 C0 00
TIME MSG DIR DATA
17:14:03:9 COT S 85 DB 8D 91 E5 0E 00 05 01 TIME MSG DIR DATA
17:14:04:6 ACM R 85 46 D6 76 73 0E 00 06 14 04 00
TIME MSG DIR DATA
17:14:15:1 ANM R 85 46 D6 76 73 0E 00 09 00 TIME MSG DIR DATA
17:14:33:5 SUS R 85 46 D6 76 73 0E 00 0D 01 00 TIME MSG DIR DATA
17:14:35:7 REL S 85 DB 8D 91 E5 0E 00 0C 02 00 02 82 E6
TIME MSG DIR DATA
17:14:35:9 RLC R 85 46 D6 76 73 0E 00 10 00 END
WO MTC03D080S*172411080176 AD-669 TIME 020515 1714 PAGE 1
ISUP MESSAGE MONITOR RESULT
USER SI CIC SP DEV CALLREF AD-669 ISUP45A 13 2-3547 UPD-973
TIME MSG DIR DATA
17:14:00:9 IAM S 85 DB 8D 91 D5 0D 00 01 04 20 00 0A 00 02 0A 08 83 90 18 38 54 80 61 0F 31 02 00 00 0A 07 03 13 18 28 25 23 82 39 02 31 C0 00
TIME MSG DIR DATA
17:14:01:1 COT S 85 DB 8D 91 D5 0D 00 05 01 TIME MSG DIR DATA
17:14:02:1 ACM R 85 46 D6 76 E3 0D 00 06 14 04 00
TIME MSG DIR DATA
17:14:05:3 ANM R 85 46 D6 76 E3 0D 00 09 00 TIME MSG DIR DATA
17:14:44:5 REL S 85 DB 8D 91 D5 0D 00 0C 02 00 02 82 FF
TIME MSG DIR DATA
17:14:44:6 RLC R 85 46 D6 76 E3 0D 00 10 00 END
Aquí se muestran estos trazados de señalización ya codificados mediante el programa C7 Decoder.
Decoded with Decoder Revision : 3.3
USER SI CIC SP DEV CALLREF AD-669 ISUP45A 14 2-3547 UPD-974
(S) <== IAM : Time = 17:14:03:6 +++ NATURE OF CONN. INDICATORS : 04
- Satellite Indic (AB) : 04 No Satellite circuit in Connection - Continuity Check Indic (CD) : 04 Continuity required on this circuit - Echo Contr. Dev. Indic (E) : 04 Outgoing echo contr dev not included +++ FORWARD CALL INDICATORS : 20
- National / Internat. (A) : 20 Treat as national call
- End-To-End Method Ind (BC) : 20 No END-TO-END method available
- Interworking Indic. (D) : 20 No Interworking encountered, C7 all the way - End-To-End Inform Ind (E) : 20 No END-TO-END information available
- VPN Call Indicator (PO) : 00 Non VPN Call
+++ CALLING PARTY CATEGORY : 0A Ordinary calling subscriber +++ TRANSM MEDIUM REQUIREMENT : 00 Speech
+++ CALLED PARTY NUMBER :
- Nature of Addr Indic. (AG) : 83 National (significant) Number - Numbering Plan Indic. (EG) : 90 ISDN numbering plan
- Internal Netw Numb (H) : 90 Routing to Internal Network not Allowed == Called Party Number : 8183449528F
+++ PROPAGATION DELAY COUNTER : 0000 Spare +++ CALLING PARTY NUMBER :
- Nature of Addr Indic. (AG) : 03 National (significant) Number - Numbering Plan Indic. (EG) : 13 ISDN numbering plan
- Screening Indic. (AB) : 13 Network provided screening - Present. Indic. (CD) : 13 Presentation allowed - Num Incomplete Ind (H) : 13 Number Complete == Calling Party Number : 8181364947 +++ PARAMETER COMPATIBILITY INF :
== nth Upgraded Parameter : 31 Propagation Delay Indicator == nth Instruction Indicator :
- Transit at Interm Exch (A) : C0 Transit Interpretation - Release Call Ind (B) : C0 Do Not Release Call - Snd Notification Ind (C) : C0 Do Not Send Notification - Discard Message Ind (D) : C0 Do Not Discard Message - Discard Parameter Ind (E) : C0 Do Not Discard Parameter - Pass On Not Possib Ind (FG) : C0 Discard Parameter
(S) <== COT : Time = 17:14:03:9
+++ CONTINUITY INDICATOR : 01 Continuity Check Successful
(R) ==> ACM : Time = 17:14:04:6 +++ BACKWARD CALL INDICATOR : 14
- Charge Indicator (AB) : 14 No Indication - Called Party Status (CD) : 14 Subscriber free - Called Party Category (EF) : 14 Ordinary subscriber
- End-To-End Indicator (GH) : 14 No END-TO-END method available - Interworking Indicator (I) : 04 No interworking encountered
- End-To-End Info Indic (J) : 04 No END-TO-END information available - ISDN UserPart Indicator (K) : 04 ISDN user part used all the way - Holding Indicator (L) : 04 Holding not requested
- ISDN Access Indicator (M) : 04 Terminating access non-ISDN
- Echo Control device ind (N) : 04 Incoming echo contr dev not included - SCCP method Indicator (OP) : 04 No Indication
(R) ==> ANM : Time = 17:14:15:1 (R) ==> SUS : Time = 17:14:33:5
+++ SUSPEND / RESUME IND : 01 Network Initiated
(S) <== REL : Time = 17:14:35:7 +++ CAUSE INDICATORS :
- Coding Standard (FG) : 82 ITU-T standard Coding
- Location (AD) : 82 Public network serving the local user == Cause Value : E6 (102) Protocol error, Recovery on timer expiry
(R) ==> RLC : Time = 17:14:35:9
USER SI CIC SP DEV CALLREF AD-669 ISUP45A 13 2-3547 UPD-973
(S) <== IAM : Time = 17:14:00:9 +++ NATURE OF CONN. INDICATORS : 04
- Satellite Indic (AB) : 04 No Satellite circuit in Connection - Continuity Check Indic (CD) : 04 Continuity required on this circuit - Echo Contr. Dev. Indic (E) : 04 Outgoing echo contr dev not included +++ FORWARD CALL INDICATORS : 20
- National / Internat. (A) : 20 Treat as national call
- End-To-End Method Ind (BC) : 20 No END-TO-END method available
- Interworking Indic. (D) : 20 No Interworking encountered, C7 all the way - End-To-End Inform Ind (E) : 20 No END-TO-END information available
- ISDN User part Ind. (F) : 20 ISDN user part used all the way - ISDN User Part Pref (GH) : 20 ISDN user part preferred all the way - ISDN Access Indicator (I) : 00 Originating access NON-ISDN
- SCCP Method Indicator (JK) : 00 No Indication - VPN Call Indicator (PO) : 00 Non VPN Call
+++ CALLING PARTY CATEGORY : 0A Ordinary calling subscriber +++ TRANSM MEDIUM REQUIREMENT : 00 Speech
+++ CALLED PARTY NUMBER :
- Nature of Addr Indic. (AG) : 83 National (significant) Number - Numbering Plan Indic. (EG) : 90 ISDN numbering plan
- Internal Netw Numb (H) : 90 Routing to Internal Network not Allowed == Called Party Number : 8183450816F
+++ PROPAGATION DELAY COUNTER : 0000 Spare +++ CALLING PARTY NUMBER :
- Nature of Addr Indic. (AG) : 03 National (significant) Number - Numbering Plan Indic. (EG) : 13 ISDN numbering plan
- Screening Indic. (AB) : 13 Network provided screening - Present. Indic. (CD) : 13 Presentation allowed - Num Incomplete Ind (H) : 13 Number Complete == Calling Party Number : 8182523228 +++ PARAMETER COMPATIBILITY INF :
== nth Upgraded Parameter : 31 Propagation Delay Indicator == nth Instruction Indicator :
- Transit at Interm Exch (A) : C0 Transit Interpretation - Release Call Ind (B) : C0 Do Not Release Call - Snd Notification Ind (C) : C0 Do Not Send Notification - Discard Message Ind (D) : C0 Do Not Discard Message - Discard Parameter Ind (E) : C0 Do Not Discard Parameter - Pass On Not Possib Ind (FG) : C0 Discard Parameter
(S) <== COT : Time = 17:14:01:1
+++ CONTINUITY INDICATOR : 01 Continuity Check Successful
(R) ==> ACM : Time = 17:14:02:1 +++ BACKWARD CALL INDICATOR : 14
- Charge Indicator (AB) : 14 No Indication - Called Party Status (CD) : 14 Subscriber free - Called Party Category (EF) : 14 Ordinary subscriber
- End-To-End Indicator (GH) : 14 No END-TO-END method available - Interworking Indicator (I) : 04 No interworking encountered
- End-To-End Info Indic (J) : 04 No END-TO-END information available - ISDN UserPart Indicator (K) : 04 ISDN user part used all the way - Holding Indicator (L) : 04 Holding not requested
- ISDN Access Indicator (M) : 04 Terminating access non-ISDN
- Echo Control device ind (N) : 04 Incoming echo contr dev not included - SCCP method Indicator (OP) : 04 No Indication
(R) ==> ANM : Time = 17:14:05:3
- Coding Standard (FG) : 82 ITU-T standard Coding
- Location (AD) : 82 Public network serving the local user == Cause Value : FF (127) Interworking, Unspecified
(R) ==> RLC : Time = 17:14:44:6
CASO 1. PROBLEMA EN LA COMPLETACIÓN DE LLAMADAS CONTRA