ADTRAN Total Access 5000 - Payload Loopback; Figure O-2. Payload Loopback Diagram

Appendix O, Loopback Provisioning - Payload Loopback
65K510DEP08-1A O-3
Payload Loopback
Apayloadloopbackperformsthesamefunctionalityasthelineloopback,exceptthepayload
loopbacksendsthereceiveddatathrough theframer,whereitisreframedandregenerated,
priortobeingtransmittedbackouttowardsthenetwork.Thistestalsoverifiestheinternal
hardwareofthemodule.
Thepayloadloopbackis
locallyinitiated.
Figure O-2. Payload Loopback Diagram
DS-3 Facility
DS3 Interface
Framer
Payload Loopback