Also, any advise on how to improve or shorten the delay in dialing-out. It's taking around 8 to 11secs before a ringback tone.
In PGM 140, set "Prefix Table ID" to equal "1" for each of the PRI channels.
In PGM 206, you need to configure the Prefix Dialing Table according to the dial-plan used in your area. Lets start with Index 1.
Prefix Code = 1 (This will be used for Long Distance calls)
Table ID = 1 (This is the Prefix Table ID we used for our PRI channels)
Min Digit = 0
Max Digit = 11 (Because long distance will be 11 digits)
Leave the rest of the settings as default.
I'm going to assume that you use 7 digit dialing in your area. So, let's go to Index 2.
Prefix Code = 2 (This will be used for 7 digit calls that start with 2)
Table ID = 1 (PRI Channels are using Table ID 1)
Min Digit = 0
Max Digit = 7 (because we're building this for 7 digit dialing beginning with "2")
The rest of the settings will be default.
Now, complete Index's 3-9 using the same as you did for "2", except you'll change the Prefix code to be 3-9.
Now the system knows that a user is through entering digits after 7 digits, or 11 digits. For instance, if someone dials 222-5555, the call will be sent to the carrier because of the settings in Index 2. The call started with "2", so the system knows a user will only dial 7 digits max.
These same settings will apply to SIP Trunks.
Of course you can also do as Derrick mentioned and have your users dial #.