I am connecting a PRI from a Merlin Legend to an Natural Microsystems board (which emulates a Legend) and I would like the display to read 7 digits instead of 4. The PRI is configured as a Merlin PBX. I've tried changing the "number to send" to the "base number and extension" and putting in "555" as the additional 3 digits but this did not work. I'm beginning to think that this only applies when sending out to a carrier. Any thoughts or help would be appreciated. - Bunkman