Cabletron Systems WPIM T1 User Manual page 45

Frame Relay Configuration
The WAN configuration is complete. Communications between the
WPIM-T1/DDS and the service provider's switch takes approximately
one or two minutes to complete. A status of Inactive displays on a DLCI
per DLCI basis by default until both ends of the DLCI are configured
correctly. Once both end devices have negotiated link management with
the switches, and are configured correctly on a DLCI per DLCI basis, the
status field displays Active.
WPIM-T1/DDS User's Guide 3-21