Ya lo he solucionado, editando extensios_additional.conf. Por algún motivo metía unas " demás.
Ahora el problema es que no marca ningún numero selecciona bien el troncal pero no manda el numero a marcar.
-- Executing [s@dynroute-4:1] Set("SIP/8110-00000002", "connid=""") in new stack
-- Executing [s@dynroute-4:2] MYSQL("SIP/8110-00000002", "Connect connid localhost asteriskuser xxxxxx asteriskcdrdb") in new stack
-- Executing [s@dynroute-4:3] GotoIf("SIP/8110-00000002", "0?dynroute-4,1,1") in new stack
-- Executing [s@dynroute-4:4] MYSQL("SIP/8110-00000002", "Query resultid 1 SELECT if (sum(duration) <= 300, 1, 0) FROM cdr WHERE DATE (calldate) >= DATE(NOW()) - INTERVAL 01 DAY and dstchannel like '%Telefonica%'") in new stack
-- Executing [s@dynroute-4:5] MYSQL("SIP/8110-00000002", "Fetch fetchid 2 dynroute") in new stack
-- Executing [s@dynroute-4:6] MYSQL("SIP/8110-00000002", "Clear 2") in new stack
-- Executing [s@dynroute-4:7] MYSQL("SIP/8110-00000002", "Disconnect 1") in new stack
-- Executing [s@dynroute-4:8] GotoIf("SIP/8110-00000002", "0?dynroute-4,1,1") in new stack
-- Executing [s@dynroute-4:9] GotoIf("SIP/8110-00000002", "0?ext-trunk,2,1") in new stack
-- Executing [s@dynroute-4:10] GotoIf("SIP/8110-00000002", "1?ext-trunk,3,1") in new stack
-- Goto (ext-trunk,3,1)
-- Executing [3@ext-trunk:1] Set("SIP/8110-00000002", "TDIAL_STRING=SIP/TelefonicaS") in new stack
-- Executing [3@ext-trunk:2] Set("SIP/8110-00000002", "DIAL_TRUNK=3") in new stack
-- Executing [3@ext-trunk:3] Goto("SIP/8110-00000002", "ext-trunk,tdial,1") in new stack
-- Goto (ext-trunk,tdial,1)
-- Executing [tdial@ext-trunk:1] Set("SIP/8110-00000002", "OUTBOUND_GROUP=OUT_3") in new stack
-- Executing [tdial@ext-trunk:2] GotoIf("SIP/8110-00000002", "1?nomax") in new stack
-- Goto (ext-trunk,tdial,4)
-- Executing [tdial@ext-trunk:4] ExecIf("SIP/8110-00000002", "0?Set(CALLERPRES()=)") in new stack
-- Executing [tdial@ext-trunk:5] Set("SIP/8110-00000002", "DIAL_NUMBER=") in new stack
-- Executing [tdial@ext-trunk:6] GosubIf("SIP/8110-00000002", "0?sub-flp-3,s,1()") in new stack
-- Executing [tdial@ext-trunk:7] Set("SIP/8110-00000002", "OUTNUM=") in new stack
-- Executing [tdial@ext-trunk:8] Set("SIP/8110-00000002", "DIAL_TRUNK_OPTIONS=Tt") in new stack
-- Executing [tdial@ext-trunk:9] Dial("SIP/8110-00000002", "SIP/TelefonicaS/,300,Tt") in new stack
== Using SIP RTP TOS bits 184
== Using SIP RTP CoS mark 5
-- Called SIP/TelefonicaS/
-- SIP/TelefonicaS-00000003 is ringing