ADTRAN Express 4120 - Manual (Page 153)

Appendix B. Log Messages
61200176L3-1 Express 4110/4120 User Manual B-3
IPCP down
level 5
IP Control Protocol port has been dropped between Express 4110/
4120 and PPP peer.
IPCP up
level 5
IP Control Protocol port has been successfully negotiated between
Express 4110/4120 and PPP peer.
IPXCP down
level 5
IPX Control Protocol port has been dropped between Express 4110/
4120 and PPP peer.
IPXCP up
level 5
IPX Control Protocol port has been successfully negotiated between
Express 4110/4120 and PPP peer.
LCP down
level 5
Link Control Protocol port has been dropped between Express 4110/
4120 and PPP peer.
LCP up
level 5
Link Control Protocol port has been successfully negotiated between
Express 4110/4120 and PPP peer.
Link is looped back
level 3
The Express 4110/4120 has dialed a location which is looping back all
data. Essentially, it has negotiated PPP with itself.