Survivable Remote Site Telephony; Using The Cisco Ip Telephony Network Locale Option; Cisco Ata Configuration Parameter - Cisco ATA186-I1 Administrator's Manual

Chapter 4 Adding the Cisco ATA to the Cisco CallManager

Survivable Remote Site Telephony

During normal Cisco ATA operation, keepalive packets are exchanged between Cisco CallManagers and
Cisco ATAs. When the WAN link fails, the Cisco ATA detects that it can no longer exchange keepalive
packets with the Cisco CallManager, so the Cisco ATA registers with the Survivable Remote Site
Telephony (SRST) router.
The Cisco ATA is configured to query the SRST router as a backup call-processing source when the
central Cisco CallManager does not acknowledge keepalive packets. The SRST router performs call
setup and processing.
When the WAN link is restored, the Cisco ATA switches back to the central Cisco CallManager, and the
SRST router purges its call processing database and reverts to SRST-standby mode. Cisco ATAs that are
in use are not interrupted by the WAN link recovery and switch back to the central Cisco CallManager
after the call is terminated.
SRST is configured on an SRST-enabled router and on the Cisco CallManager. The Cisco ATA does not
Note
need to be configured to utilize SRST.

Using the Cisco IP Telephony Network Locale Option

This release supports the Cisco IP Telephony Network Locale option for configuration of Cisco ATA
call-progress tones. The Cisco ATA must be using Cisco CallManager 3.3(3) or later with the Cisco IP
Telephony Locale Installer. The Cisco IP Telephony Locale Installer adds the Cisco ATA network locale
option to the Cisco CallManager device configuration page.
This section contains the following topics about how to configure tone parameters for the Cisco ATA:
•
•

Cisco ATA Configuration Parameter

The setting of configuration parameter ConnectMode (bit 0) determines whether the Cisco ATA uses
tone parameters supplied by the Cisco CallManager or tone parameters supplied by Cisco ATA
configuration. Configure ConnectMode, bit 0, as follows:
•
•
For more information, see the
OL-4652-01
Cisco ATA Configuration Parameter, page 4-5
Cisco IP Telephony Locale Installer Installation and Configuration, page 4-6
The default setting of 0 for ConnectMode bit 0 indicates that the Cisco ATA will use the
Cisco CallManager tones supplied by the network locale feature if Cisco CallManager 3.3(3) is
running and contains the Cisco IP Telephony Locale Installer.
Set ConnectMode bit 0 to 1 if you want the Cisco ATA-configured tone parameters to override the
Cisco CallManager tone parameters. You would use this setting if the desired locale is not supported
by the network locale feature.
Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator's Guide for SCCP (version 3.0)
"ConnectMode" section on page
Survivable Remote Site Telephony
5-21.
4-5