Configuration sample for Cisco networking. One end is the provider and another end is a subscriber. The provider's end is using a Cisco 2651XM while the subscriber's end is using a Cisco 805 router.

First, configuration of the provider's side:

Current configuration : 3467 bytes
!
version 12.2
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname CiscoHost
!
!
enable secret 5 $1$JGXe$Y2vHtRP89namalZbyeMG./
enable password 7 104D010A0618
!
username root password 7 0449030F15400D1A5A
ip subnet-zero
!
!
no ip domain-lookup
ip name-server 8.8.8.8
ip name-server 8.8.4.4
!
!
interface FastEthernet0/0
 description connected to EthernetLAN
 ip address x.x.x.197 255.255.255.192
 duplex auto
 speed auto
!
interface Serial0/0
 no ip address
 encapsulation frame-relay IETF
 frame-relay lmi-type ansi
!
interface Serial0/0.200 point-to-point
 description Link to upstream provider
 bandwidth 2048
 ip address x.x.x.2 255.255.255.252
 frame-relay interface-dlci 200 IETF
!
interface Serial0/0.201 point-to-point
 description frame-relay to Site1
 ip address 10.1.10.9 255.255.255.252
 frame-relay interface-dlci 201 IETF
!
interface Serial0/0.205 point-to-point
 description frame-relay to Site2
 ip address 10.1.10.25 255.255.255.252
 frame-relay interface-dlci 205 IETF
!
interface FastEthernet0/1
 no ip address 
 shutdown
!
interface Serial0/1
 no ip address
 description This interface is for another carrier's backhaul
 encapsulation frame-relay IETF
 frame-relay lmi-type ansi
!
interface Serial0/1.25 point-to-point
 description frame-relay link to Site3
 ip address 10.1.10.13 255.255.255.252
 frame-relay interface-dlci 25 IETF
!
interface Serial0/1.30 point-to-point
 description frame-relay link to Site4
 ip address 10.1.10.33 255.255.255.252
 frame-relay interface-dlci 30 IETF
!
ip classless
ip route 0.0.0.0 0.0.0.0 202.78.109.1
ip route x.x.x.224 255.255.255.248 10.1.10.6
ip route x.x.x.232 255.255.255.248 10.1.10.10
ip route x.x.x.240 255.255.255.248 10.1.10.14
ip route x.x.x.248 255.255.255.248 10.1.10.18
ip route x.x.x.0 255.255.255.248 10.1.10.22
ip route x.x.x.8 255.255.255.248 10.1.10.30
ip route x.x.x.16 255.255.255.248 10.1.10.26
ip route x.x.x.24 255.255.255.248 10.1.10.34
no ip http server
ip pim bidir-enable
!

!
line con 0
 exec-timeout 0 0
 password 7 1511021A0725
line aux 0
line vty 0 4
 exec-timeout 0 0
 password 7 02050D300809
 login authentication local
!
!
end

Now for the subcriber's configuration: 
Using 1540 out of 32762 bytes
!
version 11.2
no service password-encryption
service udp-small-servers
service tcp-small-servers
!
hostname Site1
!
enable secret 5 $1$38vT$uCzNqai0a69mBYhyadqnS/
enable password secretpassword
!
!
interface Ethernet0
 ip address x.x.x.17 255.255.255.248
 no ip route-cache
 no ip mroute-cache
!
interface Serial0
 no ip address
 encapsulation frame-relay IETF
 frame-relay lmi-type ansi
!
interface Serial0.100 point-to-point
 description frame-relay link to Upstream provider
 ip address 10.1.10.10 255.255.255.252
 frame-relay interface-dlci 200 IETF
!
interface Serial1
 shutdown
!
no ip classless
ip route 0.0.0.0 0.0.0.0 10.1.10.9
!
line con 0
 exec-timeout 2 0
 password secretpassword
 login
line aux 0
 password secretpassword
 login
 transport input all
line vty 0 4
 password secretpassword
 login
!
end

Note that your frame-relay provider will be the one to assign the DLCI. Take note of the DLCI as this is an important key in the configuration. This guide should ONLY provide as guide. Make necessary changes based on your requirements.