2 -2600's Full T1 Point to point DO I have to set the FDL

[dagaued1]

I will be setting up 2 Cisco 2600 point to point with a full t1 using the WIC T1 CSU/DSU card to I have to set up FDL (Facilities Data Link)?

[deilert]

If you are using a service module it is 'service-module T1 FDL both .

[dagaued1]

http://www.cisco.com/en/US/products/hw/modules/ps3129/products_tech_note09186a00800b1501.shtml

According to this link it says I can only pick one, "Facilities Data Link is off by default. It must be configured to either the American National Standards Institute (ANSI) or AT & T 54016, but not both at the same time."

Excuse my ignorance but I dont really even know what FDL does. I cant seem to find any info on it either.

[deilert]

If you do not configure FDL then the carrier will not be able to read your CSU stats or loop your CSU