I using FreePBX / Asterisk with a SPA3102 behind an existing ESI IVX KSU. From the IVX, line group 9 gets an outside line. I have a trunk connected through to SPA3102 PSTN Line. Extension to extension calls between the two systems work fine as expected. For making an outside call from Asterisk I’ve tried setting up the trunk with the Outbound dial prefix. I’ve tried putting in the string 9wwww so I get a wait after the 9. I see in the verbose debug that the Dial app sip trunk line includes the 9wwww prefixed to the outside number. However the delay never seems to be implemented and the early digits are eaten. I’ve also tried adding the 'P1 ’ to the dialplan of the SPA3102 PSTN dialplan entry but that doesn’t seem to have any effect either.
I found a couple articles that are similar to my problem but they seem to address issues with calling cards / pins and long distance service code access.
Any suggestions on how I can implement the delay in this configuration and why what I’ve tried doesn’t work?