Lab 16: Configuring PPP Authentication, Callback, and Multilink over ISDN

Lab 15d: Optional Private Line Automatic Ring Down (PLAR) Connection

As on optional lab, we have set up a private line automatic ring down (PLAR) lab. This is sometimes referred to as the Bat Phone. You can complete this lab by referring back to the VoFR lab that you did previously. All you need to do to create the PLAR connection is add one configuration statement under your voice port. Example 6-8 shows the configuration for router vofr2 to accomplish this.

Example 6-8 Configuring a PLAR Connection

  hostname vofr2   !   enable password cisco   !   ip subnet-zero   no ip domain-lookup   !   !   !   !   voice-port 3/0/0   timeouts call-disconnect 0   connection plar 1111   !   voice-port 3/0/1   timeouts call-disconnect 0   !   voice-port 3/1/0   timeouts call-disconnect 0   !   voice-port 3/1/1   timeouts call-disconnect 0   !   dial-peer voice 22 pots   destination-pattern 2222   port 3/0/0   !   dial-peer voice 1111 vofr   destination-pattern 1111   session target Serial1/0 200   !   !   interface Ethernet0/0   no ip address   no ip directed-broadcast   shutdown   !   interface TokenRing0/0   no ip address   no ip directed-broadcast   shutdown   ring-speed 16   !   interface Serial1/0   no ip address   no ip directed-broadcast   encapsulation frame-relay   frame-relay traffic-shaping   !   interface Serial1/0.1 point-to-point   ip address 150.150.10.2 255.255.255.0   no ip directed-broadcast   frame-relay interface-dlci 200   class voice   vofr cisco   !   interface Serial1/1   no ip address   no ip directed-broadcast   shutdown   !   interface Serial1/2   no ip address   no ip directed-broadcast   shutdown   !   interface Serial1/3   no ip address   no ip directed-broadcast   shutdown   !   interface FastEthernet2/0   no ip address   no ip directed-broadcast   shutdown   !   router igrp 1   network 150.150.0.0   !   ip classless   no ip http server   !   !   map-class frame-relay voice   frame-relay cir 768000   frame-relay bc 1000   frame-relay mincir 120000   no frame-relay adaptive-shaping   frame-relay fair-queue   frame-relay voice bandwidth 78000   frame-relay fragment 1500   !   !   line con 0   password cisco   transport input none   line aux 0   password cisco   line vty 0 4   password cisco   login   !   end  

With this configuration in place, all you have to do is pick up the telephone set on router vofr2 and it will automatically dial 1111 and connect you to the telephone set connected to router vofr1.