Conference call issue while redirecting channels

rahmanafzal86 · January 20, 2025, 12:26pm

Dear,

The goal is to set up a conference call where Party A calls Party B and Party C, and then Party A initiates the conference by dialing 7777. The logic involves dynamically creating a conference room and redirecting all active channels into it. However, only the current channel (Party A) is being redirected into the conference room, while the other channels (Party B and Party C) are not joining the conference as intended.

asterisk 13.

Here is my dialplan logic.

exten => 7777,1,NoOp(Starting dynamic channel handling)
; Create a unique conference room ID
same => n,Set(CONF_ROOM=${UNIQUEID})
same => n,Verbose(1, “Conference Room: ${CONF_ROOM}”)

; Store the conference room ID in AstDB
same => n,Set(DB(conference/${CONF_ROOM})=${CONF_ROOM})
same => n,Verbose(1, "Stored conference room ${CONF_ROOM} in AstDB")

; Fetch all channels for the Caller ID
same => n,Set(CALLER_ID=03004262303)
same => n,Set(PARTY_A_CALLS=${SHELL(asterisk -rx "core show channels concise" | grep ${CALLER_ID} | awk -F'!' '{print $1}' | tr '\n' ':')})
same => n,Verbose(1, "Active channels for Caller ID ${CALLER_ID}: ${PARTY_A_CALLS}")

; Validate that PARTY_A_CALLS is not empty
same => n,ExecIf($["${PARTY_A_CALLS}" = ""]?Verbose(1, "No active channels found for Caller ID: ${CALLER_ID}")?Goto(end))

; Loop through all channels and redirect them to the conference
same => n,Set(CHANNEL_LIST=${PARTY_A_CALLS})
same => n,While($["${CHANNEL_LIST}" != ""])
    same => n,Verbose(1, "Remaining CHANNEL_LIST: ${CHANNEL_LIST}")
    same => n,Set(CURRENT_CHANNEL=${CUT(CHANNEL_LIST,:,1)}) ; Get the first channel
    same => n,Set(CHANNEL_LIST=${CUT(CHANNEL_LIST,:,2-)})   ; Remove the processed channel
    same => n,ExecIf($["${CURRENT_CHANNEL}" != ""]?Verbose(1, "Attempting to redirect: ${CURRENT_CHANNEL}"))
    same => n,ExecIf($["${CURRENT_CHANNEL}" != ""]?ChannelRedirect(${CURRENT_CHANNEL},conference-join,s,1))
    same => n,ExecIf($["${CURRENT_CHANNEL}" != ""]?Verbose(1, "Redirect status: ${CHANNELREDIRECTSTATUS}"))
same => n,EndWhile()
; Start the conference for the current caller (non-blocking mode)
same => n,ConfBridge(${CONF_ROOM},default_bridge,default_user,default_menu)

; End label
same => n(end),NoOp(Dialplan execution finished for Caller ID ${CALLER_ID})

[conference-join]
exten => s,1,Verbose(1, “Joining conference room…”)
; Retrieve the conference room ID from AstDB
same => n,Set(CONF_ROOM=${DB(conference/${CONF_ROOM})})
same => n,Verbose(1, “Retrieved conference room ${CONF_ROOM} from AstDB”)
same => n,ConfBridge(${CONF_ROOM},default_bridge,default_user,default_menu)

and console logs are:

-- Executing [7777@tp-opensips:1] NoOp("SIP/mbl-callmax-00000004", "Starting dynamic channel handling") in new stack
-- Executing [7777@tp-opensips:2] Set("SIP/mbl-callmax-00000004", "CONF_ROOM=1737375334.4") in new stack
-- Executing [7777@tp-opensips:3] Verbose("SIP/mbl-callmax-00000004", "1, "Conference Room: 1737375334.4"") in new stack

“Conference Room: 1737375334.4”
– Executing [7777@tp-opensips:4] Set(“SIP/mbl-callmax-00000004”, “DB(conference/1737375334.4)=1737375334.4”) in new stack
– Executing [7777@tp-opensips:5] Verbose(“SIP/mbl-callmax-00000004”, “1, “Stored conference room 1737375334.4 in AstDB””) in new stack
“Stored conference room 1737375334.4 in AstDB”
– Executing [7777@tp-opensips:6] Set(“SIP/mbl-callmax-00000004”, “CALLER_ID=03004262303”) in new stack
– Remote UNIX connection
– Remote UNIX connection disconnected
– Executing [7777@tp-opensips:7] Set(“SIP/mbl-callmax-00000004”, “PARTY_A_CALLS=SIP/mbl-callmax-00000004:SIP/mbl-callmax-00000002:SIP/mbl-callmax-00000000:”) in new stack
– Executing [7777@tp-opensips:8] Verbose(“SIP/mbl-callmax-00000004”, “1, “Active channels for Caller ID 03004262303: SIP/mbl-callmax-00000004:SIP/mbl-callmax-00000002:SIP/mbl-callmax-00000000:””) in new stack
“Active channels for Caller ID 03004262303: SIP/mbl-callmax-00000004:SIP/mbl-callmax-00000002:SIP/mbl-callmax-00000000:”
– Executing [7777@tp-opensips:9] ExecIf(“SIP/mbl-callmax-00000004”, “0?Verbose(1, “No active channels found for Caller ID: 03004262303”)?Goto(end)”) in new stack
– Executing [7777@tp-opensips:10] Set(“SIP/mbl-callmax-00000004”, “CHANNEL_LIST=SIP/mbl-callmax-00000004:SIP/mbl-callmax-00000002:SIP/mbl-callmax-00000000:”) in new stack
– Executing [7777@tp-opensips:11] While(“SIP/mbl-callmax-00000004”, “1”) in new stack
– Executing [7777@tp-opensips:12] Verbose(“SIP/mbl-callmax-00000004”, “1, “Remaining CHANNEL_LIST: SIP/mbl-callmax-00000004:SIP/mbl-callmax-00000002:SIP/mbl-callmax-00000000:””) in new stack
“Remaining CHANNEL_LIST: SIP/mbl-callmax-00000004:SIP/mbl-callmax-00000002:SIP/mbl-callmax-00000000:”
– Executing [7777@tp-opensips:13] Set(“SIP/mbl-callmax-00000004”, “CURRENT_CHANNEL=SIP/mbl-callmax-00000004”) in new stack
– Executing [7777@tp-opensips:14] Set(“SIP/mbl-callmax-00000004”, “CHANNEL_LIST=SIP/mbl-callmax-00000002:SIP/mbl-callmax-00000000:”) in new stack
– Executing [7777@tp-opensips:15] ExecIf(“SIP/mbl-callmax-00000004”, “1?Verbose(1, “Attempting to redirect: SIP/mbl-callmax-00000004”)”) in new stack
“Attempting to redirect: SIP/mbl-callmax-00000004”
– Executing [7777@tp-opensips:16] ExecIf(“SIP/mbl-callmax-00000004”, “1?ChannelRedirect(SIP/mbl-callmax-00000004,conference-join,s,1)”) in new stack
– Executing [s@conference-join:1] Verbose(“SIP/mbl-callmax-00000004”, “1, “Joining conference room…””) in new stack
“Joining conference room…”
– Executing [s@conference-join:2] Set(“SIP/mbl-callmax-00000004”, “CONF_ROOM=1737375334.4”) in new stack
– Executing [s@conference-join:3] Verbose(“SIP/mbl-callmax-00000004”, “1, “Retrieved conference room 1737375334.4 from AstDB””) in new stack
“Retrieved conference room 1737375334.4 from AstDB”
– Executing [s@conference-join:4] ConfBridge(“SIP/mbl-callmax-00000004”, “1737375334.4,default_bridge,default_user,default_menu”) in new stack
> 0x7f5f84026c90 – Strict RTP qualifying stream type: audio
> 0x7f5f84026c90 – Strict RTP switching source address to 12.29.211.22:2480
– <SIP/mbl-callmax-00000004> Playing ‘vm-rec-name.gsm’ (language ‘en’)
– <SIP/mbl-callmax-00000004> Playing ‘beep.gsm’ (language ‘en’)
> 0x7f5f84026c90 – Strict RTP learning complete - Locking on source address 12.29.211.22:2480
– x=0, open writing: /var/spool/asterisk/confbridge/confbridge-name-1737375334.4-1737375334.4 format: sln, 0x7f5fec003598
– User ended message by pressing #
– <SIP/mbl-callmax-00000004> Playing ‘auth-thankyou.gsm’ (language ‘en’)
> 0x7f5f840153a0 – Strict RTP learning complete - Locking on source address 12.29.211.22:2475
– Channel CBAnn/1737375334.4-00000000;2 joined ‘softmix’ base-bridge <9398e43f-56de-4a3a-bd13-04cbdf7ee3fa>
– <SIP/mbl-callmax-00000004> Playing ‘conf-onlyperson.gsm’ (language ‘en’)
– <CBAnn/1737375334.4-00000000;1> Playing ‘/var/spool/asterisk/confbridge/confbridge-name-1737375334.4-1737375334.4.slin’ (language ‘en’)
– <CBAnn/1737375334.4-00000000;1> Playing ‘conf-hasjoin.gsm’ (language ‘en’)
– Started music on hold, class ‘default’, on channel ‘SIP/mbl-callmax-00000004’
– Channel SIP/mbl-callmax-00000004 joined ‘softmix’ base-bridge <9398e43f-56de-4a3a-bd13-04cbdf7ee3fa>
– <CBAnn/1737375334.4-00000000;1> Playing ‘confbridge-join.gsm’ (language ‘en’)
– Stopped music on hold on SIP/mbl-callmax-00000004
– Channel SIP/mbl-callmax-00000004 left ‘softmix’ base-bridge <9398e43f-56de-4a3a-bd13-04cbdf7ee3fa>
– <CBAnn/1737375334.4-00000000;1> Playing ‘/var/spool/asterisk/confbridge/confbridge-name-1737375334.4-1737375334.4.slin’ (language ‘en’)
– <CBAnn/1737375334.4-00000000;1> Playing ‘conf-hasleft.gsm’ (language ‘en’)

Pooh · January 20, 2025, 12:45pm

On Monday 20 January 2025 at 13:29:16, rahmanafzal86 via Asterisk Community
wrote:

; Store the conference room ID in AstDB
same => n,Set(DB(conference/${CONF_ROOM})=${CONF_ROOM})

I don’t understand the purpose or use of this.

You can’t look up that DB entry unless you already know its content, so what
is the point?

; Retrieve the conference room ID from AstDB
same => n,Set(CONF_ROOM=${DB(conference/${CONF_ROOM})})

I believe this does nothing. It simply sets CONF_ROOM to the same value it
had to start with.

And, as you can see, this is the last dialplan priority which gets executed:

– Executing [s@conference-join:4] ConfBridge(“SIP/mbl-callmax-00000004”,
“1737375334.4,default_bridge,default_user,default_menu”) in new stack

Therefore the ConfBridge command is not returning to your “tp-opensips”
context to allow it to handle the remaining channels.

https://docs.asterisk.org/Latest_API/API_Documentation/Dialplan_Applications/ConfBridge/
is not clear to me whether it blocks until the conference ends (or the user
leaves) but the implication from your log output is that it does.

Antony.

–
BASIC is to computer languages what Roman numerals are to arithmetic.

Pooh · January 20, 2025, 1:04pm

On Monday 20 January 2025 at 13:56:58, Pooh via Asterisk Community wrote:

https://docs.asterisk.org/Latest_API/API_Documentation/Dialplan_Applications/ConfBridge/

is not clear to me whether it blocks until the conference ends (or the user
leaves) but the implication from your log output is that it does.

Also, the possible values for CONFBRIDGE_RESULT all have meaning only after
the user leaves (or fails to join) the conference, therefore it is clearly
blocking until the user exits the conference.

Antony

–
“Black holes are where God divided by zero.”

Steven Wright

system · February 19, 2025, 1:04pm

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Conference call issue while redirecting channels

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