Question : interface serial down  line protocol down

Cisco rookie here.  I had to swap out a failed router and used the existing config from the old router on the new.  I changed the name of the serial interface to reflect the serial name on the new router.

Everything is working fine on the ethernet interfaces, however the serial says down down.

Here is the config of that interface.

interface Serial0/0/0
 description Frame Relay to Bellsouth ckt ID 70QGDA500669
 no ip address
 encapsulation frame-relay IETF
 no fair-queue
 service-module t1 timeslots 1-24
 frame-relay lmi-type cisco
!
interface Serial0/0/0.102 point-to-point
 description PVC to Plantation PKRouter
 ip address 192.168.196.1 255.255.255.0
 ip nat inside
 frame-relay interface-dlci 102
!
interface Serial0/0/0.103 point-to-point
 description PVC to  PDRouter
 ip address 192.168.198.1 255.255.255.0
 ip nat inside
 frame-relay interface-dlci 103
!
interface Serial0/0/0.104 point-to-point
 description PVC to Marathon MRRouter
 ip address 192.168.195.1 255.255.255.0
 ip nat inside
 frame-relay interface-dlci 104
!
interface Serial0/0/0.117 point-to-point
 description PVC to MCSO
 ip address 192.168.192.1 255.255.255.248
 ip nat inside
 frame-relay interface-dlci 117
!
interface Serial0/0/0.201 point-to-point
 description PVC to CFRouter
 ip address 160.131.26.138 255.255.255.252
 ip nat outside
 frame-relay interface-dlci 201
!

Answer : interface serial down  line protocol down

>Do understand that Frame Relay, i.e. WAN protocol, uses (inARP) inverse-arp,

netcmh:
Inverse ARP is an end-to-end protcol. As such, the provider does not maintain any tables regarding inverse ARP. Also, since the interface is down, that means it's a layer 1 issue.

MattGardi:
What T1 card did you have in the 3640 and what card do you have in the 1800?