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Cisco Hoot and Holler over IP
Hoot and Holler over IP Overview
VC-826
Cisco IOS Voice, Video, and Fax Configuration Guide
Hoot and holler is used in these various industries as a way to provide a one-to-many or many-to-many
conferencing service for voice communications. In the past, hoot and holler was deployed using
point-to-point telephone company circuits and a hoot and holler bridging and mixing functionality that
was provided either by the customer or as a service of the Public Switched Telephone Network (PSTN)
carrier.
A common use of hoot and holler is a broadcast audio network that is used throughout the brokerage
industry to communicate morning reports as well as to advise the trading community within a brokerage
firm on market movements, trade executions, and so on. All users can talk simultaneously with each
other, if desired.
But more commonly, a broker in a field office will “shout” an order to the trading floor. The shout
ensures that the trading floor can hear the order and a floor trader can confirm the transaction. A typical
brokerage firm has several of these networks for equity, retail, and bonds with network size and degree
of interactivity varying depending on the application.
Within the financial community there are two general uses for hoot and holler networks:
• Market updates—Market update (morning report) hoot networks tend to be active for an hour in the
morning and inactive for the rest of the day.
• Trading—Trading hoot networks tend to be more widely used throughout the trading day.
Both of these applications can reap significant advantages by running over an IP network because any
idle bandwidth can be reclaimed by data applications.
Today most hoot and holler customers pay for separate leased-line charges from a common carrier to
transport their hoot and holler to remote branch offices. This recurring charge is usually
significant—some larger firms spend more than $2 million to $3 million per year just to distribute hoot
and holler feeds.
Cisco’s hoot and holler over IP feature:
• Eliminates yearly reoccurring switched-circuit telephone company charges (toll-bypass)
• Eliminates the need for leased lines and the accompanying charges
• Reduces the need for hoot and holler bridges
• Improves hoot and holler network manageability
• Reduces the time to troubleshoot a problem from hours to minutes
• Reduces the time to provision bandwidth from days to a few hours
• Increases productivity through future applications (such as IP/TV and turret support)
• Provides the ability to integrate voice, video, and data signaling capabilities
Cisco hoot and holler over IP is supported on Cisco 2600 and 3600 series routers and on NM-HDV,
NMZV, and NM-2V network modules
For information about installing voice network modules and voice interface cards in Cisco 2600 and
Cisco 3600 series routers, refer to the Cisco Network Module Hardware Installation Guide and the WAN
Interface Card Hardware Installation Guide.
For information about configuring Voice over IP features, refer to the Software Configuration Guide for
Cisco 3600 Series and Cisco 2600 Series Routers, to the Voice over IP Quick Start Guide, and to the
“Voice over IP Overview” chapter in this configuration guide.
For further information about IP multicasting, refer to the IP Multicast Site at
http://www.cisco.com/ipmulticast.
For further information about IP/TV, refer to the IP/TV Content Manager User Guide.