ShoreTel AP110 Specifications download pdf (Page 87)

ShoreTel 9.1 Page 87

Failover

Introduction

Definition

ShoreTel 9 implements the following Failover enhancements:

• IP Phone Calls Continue Through Failover feature enhances IP Phone Failover to

continue a voice call, even after the managing switch becomes unavailable, until the

normal completion of the call

• Spare Switch Failover introduces spare switches for handling IP Phones that failover.

Refer to the Glossary for a definition of the following terms used in this release note:

• Call Manager (switch)

• Failback

• Failover

• IP Phone Configuration Switch

• IP Phone Failover

• IP Phone Keep Alive

This release note uses the following endpoint and switch designations to describe the

component functions during the failover process.

• Local endpoint: The endpoint controlled by the failed switch during a failover.

• Remote endpoint: The endpoint controlled by the functioning switch during a failover.

• Failed switch: The switch that triggered the failover when it became unavailable.

• New switch: The switch that replaces an unavailable switch in response to a failover.

• Surviving Switch: The switch that remains available when a failover is triggered.

IP Phone Operation

IP phones in a ShoreTel system interact with two ShoreGear switches: the configuration

switch and the call manager switch. The configuration switches help the IP phones obtain

their configuration from the ShoreWare server, which functions as a FTP server for the IP

phones. Each system has one configuration switch and can designate a second switch as a

backup.

During the configuration process, each IP phone is assigned a ShoreGear switch that acts as

its call manager for setting up and tearing down calls. IP phones communicate with

ShoreGear switches via MGCP, a device control protocol. The relationship between the

switch (call manager) and the phone (gateway) follows a master–slave model.

Media travels through the ShoreTel system using Real-Time Protocol (RTP). After call

setup, media flows directly between IP phones via RTP. The ShoreGear switch is involved

only when setting up or tearing down a call.

1 2 ... 82 83 84 85 86 87 88 89 90 91 92 ... 177 178

No comments

ShoreTel AP110 Specifications Page 87