2 Replies Latest reply on Jul 6, 2017 1:03 PM by letumcrux

    PRI transfer to analog line failing

    letumcrux New Member

      Hi! I have a 908 2nd gen that is handling a fiber PRI to another vendors IVR and another vendors PBX. the IVR accepts numbers passed through the PRI, and we only have 1 number from the PRI actually using this connection, the rest are set for analog FXS ports that go to the PBX, the IVR and PBX do not interact.

       

      My issue right now, is when a call hits the IVR, goes through all its messages, it is suppose to transfer the call to a specific number that is handled through an FXS port. and if another call comes in, the ISP is handling call forward busy if someone is on that specific FXS port, which then rings a different fxs port. Unfortunately this seems to happen intermittently. with most calls dropping. the ISP shows their monitor as the call was ending as it was expected and getting an OK for the call with no issues.

       

      I want to make sure my config for the 908 wont have any issues with the IVR asking to transfer the call to the fxs port numbers. the 900 takes in a full 10 digit request from the IVR and strips it down to 4 when delivering it to the analog ports.

       

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      no dot11ap access-point-control

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      interface eth 0/1

        description WAN to XXXXXXXXXXX NTU

        ip address  XXXXXXXXXXX  XXXXXXXXXXX

        media-gateway ip primary

        no shutdown

      !

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      !

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      interface t1 0/1

        description PRI

        tdm-group 1 timeslots 1-12,24 speed 64

        shutdown

      !

      interface t1 0/2

        description PRI

        tdm-group 1 timeslots 1-12,24 speed 64

        no shutdown

      !

      !

      interface pri 1

        isdn name-delivery setup

        connect t1 0/2 tdm-group 1

        no shutdown

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      interface fxs 0/1

        no shutdown

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      interface fxs 0/2

        no shutdown

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      interface fxs 0/3

        no shutdown

      !

      interface fxs 0/4

        no shutdown

      !

      interface fxs 0/5

        no shutdown

      !

      interface fxs 0/6

        no shutdown

      !

      interface fxs 0/7

        no shutdown

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      interface fxs 0/8

        no shutdown

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      isdn-group 1

        connect pri 1

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      ip route XXXXXXXXXXX

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      no tftp server

      no tftp server overwrite

      no http server

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      no snmp agent

      no ip ftp server

      no ip scp server

      no ip sntp server

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      sip

      sip udp XXXXXXXXXXX

      no sip tcp

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      voice feature-mode network

      voice quality-stats history max-streams 100

      voice forward-mode network

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      voice trunk T01 type sip

        sip-server primary XXXXXXXXXXX

        domain "XXXXXXXXXXX"

        register XXXXXXXXXXX auth-name "XXXXXXXXXXX" password "XXXXXXXXXXX"

        register XXXXXXXXXXX auth-name "XXXXXXXXXXX" password "XXXXXXXXXXX"

        register XXXXXXXXXXX auth-name "XXXXXXXXXXX" password "XXXXXXXXXXX"

        register XXXXXXXXXXX auth-name "XXXXXXXXXXX" password "XXXXXXXXXXX"

        register XXXXXXXXXXX auth-name "XXXXXXXXXXX" password "XXXXXXXXXXX"

        register XXXXXXXXXXX auth-name "XXXXXXXXXXX" password "XXXXXXXXXXX"

        register XXXXXXXXXXX auth-name "XXXXXXXXXXX" password "XXXXXXXXXXX"

        register XXXXXXXXXXX auth-name "XXXXXXXXXXX" password "XXXXXXXXXXX"

        register XXXXXXXXXXX auth-name "XXXXXXXXXXX" password "XXXXXXXXXXX"

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      voice trunk T51 type isdn

        description "to PBX"

        resource-selection linear ascending

        caller-id-override number-inbound XXXXXXXXXXX

        connect isdn-group 1

        match dnis "XXXXXX$" substitute "$"

        modem-passthrough detection-time 120

        rtp delay-mode fixed

        rtp packet-delay nominal 80

        rtp packet-delay fax 80

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      voice grouped-trunk CPESIPTG

        trunk T01

        accept $ cost 0

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      voice grouped-trunk PRI

        description "PRI"

        trunk T51

        accept $ cost 1

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      voice user 1001

        connect fxs 0/1

        password "XXXXXXXXXXX"

        did "XXXXXXXXXXX"

        sip-identity XXXXXXXXXXX T01

        modem-passthrough

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      voice user 1002

        connect fxs 0/2

        password "XXXXXXXXXXX"

        did "XXXXXXXXXXX"

        sip-identity XXXXXXXXXXX T01

        modem-passthrough

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      voice user 1003

        connect fxs 0/3

        password "XXXX"

        did "XXXXXXXXXXX"

        sip-identity XXXXXXXXXXX T01

        modem-passthrough

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      voice user 1004

        connect fxs 0/4

        password "XXXX"

        did "XXXXXXXXXXX"

        sip-identity XXXXXXXXXXX T01

        modem-passthrough

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      voice user 1005

        connect fxs 0/5

        password "XXXXXXXXXXX"

        did "XXXXXXXXXXX"

        sip-identity XXXXXXXXXXX T01

        modem-passthrough

      !

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      voice user 1006

        connect fxs 0/6

        password "XXXXXXXXXXX"

        did "XXXXXXXXXXX"

        sip-identity XXXXXXXXXXX T01

        modem-passthrough

        no echo-cancellation

        • Re: PRI transfer to analog line failing
          jayh Hall_of_Fame

          The problem may be with your provider's implementation of call-forward-busy. You could try building a ring-group and putting the FXS extensions within the ring group, then have the provider point the calls to the ring group. This sounds like a series-completion problem within your provider.

            • Re: PRI transfer to analog line failing
              letumcrux New Member

              Finally found the issue.

               

              voice trunk T51 type isdn

                description "to PBX"

                resource-selection linear ascending

                caller-id-override number-inbound XXXXXXXXXXX

               

              the reason we had to add this is the IVR is too old to send any sip commands, because of this it could not send a number to charge for the call. we added the caller-id-override to work around the fact the IVR cannot send us a charge number, but we ended up using the first line in their analog port numbers for the override.

               

              So, with it set this way, if the first number was available, it would charge itself for the call and the call would drop. if it was busy, the transfers would work fine. but any time the first number was not busy, any transfers would fail.

               

              To fix this we changed the caller-id-override to the IVR number that isnt on one of the analog ports, no number on their system will ever call this number, so it will never charge itself, which means the calls will not fail.