For anyone having this problem, as I did, and has found no love in the forum here is what I did to fix it:
1) Go to Telecom/ Call Routing in the Linuxmce Admin Website and under a user's name select a user mode/ call type.
2) Next to "add new step" select "transfer to outside number" from the drop down box, then type in your outside number preceded by a 9 such as 918885551212 if you live in the US. Click on the Add button.
3) You will see that it added the step you requested but puts the number 2147483647 in the box instead of the number you added. Even though this is editable, ignore it.
4) Open a terminal and ssh into linuxmce (ssh firstname.lastname@example.org
if you use the default ip) then get admin rights with a sudo -s
5) Open an editing program and the file this is supposed to be written to with a command such as "nano /etc/asterisk/extensions_pluto_dial.conf"
6) Search for "214" if it is there, replace the whole 2147483647 with the number you entered originally (preceded with 9 as described above), Save the file. If 214 is not there, search for the number you entered and make sure it is associated with the correct user extension such as 301. If neither are there try adding the outside number step again and proceed once one of them is there.
7) Reopen the file and check again, just to be sure. Exit.
from the terminal run "asterisk -vvvvvr"
9) once asterisk opens, type "restart gracefully"
10) open asterisk CLI again as described in 8
11) Dial into your phone system and go to user you want to have phone forwarded to by selecting it from the prompt. It should now dial out correctly. (Easy to test this using the cell phone you have listed as the number to dial"
I don't know how the script works on this web page in the admin website, but it sure seems like it would be an easy fix. Obviously the developer has put a place holder in there for testing and has forgotten to replace it with the variable you are entering. Hopefully once you fix this you don't need to go back and fix it every time asterisk restarts or another call type is modified, but I have not tested this yet.
This is in 7.10. Hopefully someone will take note of this for the next release. Sure makes your phone system much more useful.