Cisco Systems VC-825 appendix Router-1 E&M Four-Wire Ports, VC-849

Cisco Hoot and Holler over IP

Configuration Examples

Cisco Hoot and Holler over IP with Ethernet Topology (Two Hoot Groups)

The following figure illustrates Cisco hoot and holler over IP being used with an Ethernet topology:

Figure 135 Cisco Hoot and Holler over IP with Ethernet Topology

E&M
4-wire	FXS
Router 1	Router 2

35969

	Router 3	Group 1
FXO	FXO
PBX	PBX	Group 2

E&M = ear and mouth

FXO = Foreign Exchange Office

FXS = Foreign Exchange Station

In this configuration, two hoot and holler groups are set up by defining two multicast groups (237.16.8.11 and 237.16.26.12) and mapping the connection command and trunk keyword (specifying

11)and connection command and trunk keyword (specifying 12) from the voice ports to the VoIP dial peers associated with each group. Each router is connected to a dedicated switch port, and IP precedence is set to 5 for all Cisco hoot and holler over IP packets.

Router-1 (E&M Four-Wire Ports)

The following output shows that Router 1 has been configured for E&M four-wire ports:

hostname Router-1

!

ip multicast-routing

!

voice class permanent 1

signal timing oos timeout disabled signal keepalive 65535

!

interface Vif1

ip address 1.1.1.1 255.255.255.0 ip pim sparse-dense-mode

!

interface Ethernet0/0

ip address 1.5.13.1 255.255.255.0 ip pim sparse-dense-mode

!

router rip network 1.1.1.0

Cisco IOS Voice, Video, and Fax Configuration Guide

VC-849