This is a lab for VoIP. 1) I have 3640 with one VIC card which has 2 FXS ports.I connect one of those to telephone instrument and I get a dial tone once port is up. 2) I have one 3810 with 6 AVM ports out of which 2 are FXS. At one of the FXS I connect telephone instrument I get dial tone. My question is, is there any way to configure VoIP in the lab using these two routers? I have tried configuring both the fxs port in 3640 and 3810.I am pasting the config also.But some how I am not able to dial from one place to another. I am getting busy line. I have configured frame-relay cloud bet. 3640 and 3810 also and tried. First I tried with just serial IP cloud in between and then F/R I have done. I am doubtful at 3810 side. This is runn conf from 3640. version 12.1 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname 3640 ! ! ! ! ! ! ip subnet-zero ! ! ! interface FastEthernet0/0 no ip address shutdown duplex auto speed auto ! interface FastEthernet0/1 no ip address shutdown duplex auto speed auto ! interface ATM2/0 no ip address shutdown no atm ilmi-keepalive no scrambling-payload ! interface ATM2/1 no ip address shutdown no atm ilmi-keepalive no scrambling-payload ! interface ATM2/2 no ip address shutdown no atm ilmi-keepalive no scrambling-payload ! interface ATM2/3 no ip address shutdown no atm ilmi-keepalive no scrambling-payload ! interface Serial3/0 no ip address shutdown ! interface Serial3/1 encap frame-relay bandwidth 64 ip address 192.168.11.2 255.255.255.0 clockrate 64000 ip rtp header-compression ip rtp compression-connections 25 ! interface Serial3/2 no ip address shutdown ! interface Serial3/3 no ip address shutdown ! ip classless no ip http server ! ! voice-port 1/0/0 ! voice-port 1/0/1 ! dial-peer voice 402 voip destination-pattern 1408559999 session target ipv4:192.168.11.3 dial-peer voice 401 pots destination-pattern 1408553737 port 1/0/0 ! router rip netwrok 192.168.11.0 line con 0 transport input none line aux 0 line vty 0 4 ! end This is from 3810 sho ru Building configuration... Current configuration: ! version 12.0 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname 3810 ! ! network-clock base-rate 56k ip subnet-zero ! ! ! ! ! interface Ethernet0 no ip address no ip directed-broadcast shutdown ! interface Serial0 ip address 192.168.11.3 255.255.255.0 no ip directed-broadcast encapsulation frame-relay no ip mroute-cache no fair-queue frame-relay traffic-shaping frame-relay ip rtp header-compression ! interface Serial1 no ip address no ip directed-broadcast shutdown ! interface Switch0 no ip address no ip directed-broadcast encapsulation frame-relay no fair-queue ! interface FR-ATM20 no ip address no ip directed-broadcast shutdown ! ip classless ip route 0.0.0.0 0.0.0.0 Serial0 no ip http server ! ! ! gatekeeper shutdown ! ! line con 0 transport input none line aux 0 line 2 3 line vty 0 4 ! ! voice-port 1/1 timeouts call-disconnect 0 ! voice-port 1/2 timeouts call-disconnect 0 ! ! dial-peer voice 501 pots destination-pattern 1408559999 port 1/1 ! dial-peer voice 502 vofr (i have my doubts here as I can not define voip pots here) destination-pattern 1408553737 session target Serial 0 201 (this is DLCI value) ! end I can dial but I get all the time busy tone from either side. As i am new, i might have made some silly mistake here so if u can help me then it would be really appreciated. Thanx a lot in advance ... KEYUR. _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]