I have a strange problem with call transfering sometimes after transfer there is only voice in one direction. I make connection through ISDN to IP Phone from OXO and then I make call transfer from IP Phone using SIP Trunk to FreePBX - (Cisco spa502g) after answering the phone person from the ISDN hears me but I don't hear nothing from the ISDN. This issue is not on every call transfer.
I use g711 on both sides so this shouldn't be the problem. I did port sniffing and on wireshark I see that Alcatel is cuting the voice in transmision to FreePBX after few milliseconds. Transmission from FreePBX/Asterisk to Alcatel is ok. For SIP Trunk on Alcatel i've setup no. of channels to 5 and "IP Quality of Service" to 10100000 IP_PRECEDENCE_5 - i don't know if those parameters are ok. OXO version: Software: ALZPL800/035.001
Everything works in local network.
Please provide SIP traces on OXO end (communication between OXO and Cisco gateway).
Is the SIP trunk declared as public or private? How is transfer implemented? (joining or re-routing?)
I'm not at the customer's site and am trying to help a technical guy there.
The PBX is an Omnivista 4760 with a PRI 30 connected to it, implemented by a different company not on site.
In the PBX a private siptrunk is made with the FreeSwitch soft pbx implemented by us.
The problem occurs only 1 to 4 times in 50 calls so is very hard to simulate and/or trace.
kevintheviking wrote:
I'm not at the customer's site and am trying to help a technical guy there.
The PBX is an Omnivista 4760 with a PRI 30 connected to it
Omnivista is a management and accounting platform not a PBX.
Ask Alcatel engineer to provide you the traces from OXO side. Make also your own tcpdump.
There is no other way but to reproduce --> maybe this just happens for some users with a particular configuration.
Could you please help me on this issue: I have one OXO PBX system with ISDN T0 connectivity, while initiating call Via ISDN am getting unobtainable error message in my phone however I can initiate other number patters only issue with some specific number(1505).
Problamatic number:1505, all other numbers are working with same ISDN line.Could you please verify the ISDN trace and give me update for me.
ISDN3_00220 23/10 16:05:58 TX d_channel: 59 (S:00 T:000) payload: (36) 08 02 00 41 05 04 03 80 90 A3 18 01 A3 6C 0A 41 80 36 36 33 37 39 32 38 38 70 02 81 31 7D 02 91 81 7E 01 04
0x05 SETUP Ref: O,65
ie 0x04 Bearer capability: 80 90 A3
Coding: CCITT standardized
Information transfer capability: Speech
Transfer mode: Circuit mode
Transfer rate: 64 Kbit/s
User info layer 1: G.711 A-law
ie 0x18 Channel identification: A3
Interface identifier: Implicit
Interface type: Primary rate
Indicated channel: Preferred
D-channel identified: No
Information channel selection: any channel
ie 0x6C Calling party number: 41 80 36 36 33 37 39 32 38 38
Number type: Subscriber number
Numbering plan: ISDN/Telephony(CCITT Recommendation E.164/E.163)
Presentation: presentation allowed
Screening: user-provided, not screened
Number: 66379288
ie 0x70 Called party number: 81 31
Number type: Unknown
Numbering plan: ISDN/Telephony(CCITT Recommendation E.164/E.163)
Number: 1
ie 0x7D High layer compatibility: 91 81
ie 0x7E User-user: 04
ISDN3_00221 23/10 16:05:58 RX d_channel: 59 (S:00 T:000) payload: (12) 08 02 80 41 7D 08 02 82 B2 14 01 01
0x7D STATUS Ref: D,65
ie 0x08 Cause: 82 B2
Coding: CCITT standardized
Location: Public network serving the local user
Class: Normal event
Value: Requested facility not subscribed
ie 0x14 Call state: 01
ISDN3_00222 23/10 16:05:58 RX d_channel: 59 (S:00 T:000) payload: (10) 08 02 80 41 0D 18 03 A9 83 81
0x0D SETUP_ACK Ref: D,65
ie 0x18 Channel identification: A9 83 81
Interface identifier: Implicit
Interface type: Primary rate
Indicated channel: Exclusive
D-channel identified: Yes
Information channel selection: B1 channel
Coding: CCITT standardized
Channel type: B-channel units
Channel number: 0x01
ISDN3_00223 23/10 16:05:58 TX d_channel: 59 (S:00 T:000) payload: (9) 08 02 00 41 7B 70 02 81 35
0x7B INFORMATION Ref: O,65
ie 0x70 Called party number: 81 35
Number type: Unknown
Numbering plan: ISDN/Telephony(CCITT Recommendation E.164/E.163)
Number: 5
ISDN3_00224 23/10 16:05:58 TX d_channel: 59 (S:00 T:000) payload: (9) 08 02 00 41 7B 70 02 81 30
0x7B INFORMATION Ref: O,65
ie 0x70 Called party number: 81 30
Number type: Unknown
Numbering plan: ISDN/Telephony(CCITT Recommendation E.164/E.163)
Number: 0
ISDN3_00225 23/10 16:05:58 TX d_channel: 59 (S:00 T:000) payload: (9) 08 02 00 41 7B 70 02 81 35
0x7B INFORMATION Ref: O,65
ie 0x70 Called party number: 81 35
Number type: Unknown
Numbering plan: ISDN/Telephony(CCITT Recommendation E.164/E.163)
Number: 5
ISDN3_00226 23/10 16:05:58 RX d_channel: 59 (S:00 T:000) payload: (13) 08 02 80 41 45 08 02 82 95 1E 02 82 88
0x45 DISCONNECT Ref: D,65
ie 0x08 Cause: 82 95
Coding: CCITT standardized
Location: Public network serving the local user
Class: Normal event
Value: Call rejected
ie 0x1E Progress indicator: 82 88
Coding: CCITT standardized
Location: Public network serving the local user
Progress: In-band information or appropriate pattern now available
ISDN3_00227 23/10 16:06:00 TX d_channel: 59 (S:00 T:000) payload: (9) 08 02 00 41 4D 08 02 81 90
0x4D RELEASE Ref: O,65
ie 0x08 Cause: 81 90
Coding: CCITT standardized
Location: Private network serving the local user
Class: Normal event
Value: Normal release
ISDN3_00228 23/10 16:06:00 RX d_channel: 59 (S:00 T:000) payload: (5) 08 02 80 41 5A
0x5A RELEASE_COMP Ref: D,65