Below is an example of how to setup an Allied Telesyn 410S for Unnumbered Frame Relay, which is generally how MCI delivers their loops.
PRI configuration
set pri=bay0.pri0 mode=tdm tdm=1-24
TDM configuration
create tdm group=wan interface=bay0.pri0 slots=1-24
PPP configuration
create fr=0 over=tdm-wan set fr=0 over=tdm-wan lqr=off echo=10
IP configuration
enable ip add ip int=vlan1-0 ip=192.218.129.1 mask=255.255.255.192 add ip int=fr0-0 ip=0.0.0.0 add ip int=vlan1-1 ip=192.168.1.1 add ip rou=0.0.0.0 mask=0.0.0.0 int=fr0-0 next=0.0.0.0 dlc=500 add ip dns prim=198.6.1.1 seco=198.6.1.2
