Installation guide

Advanced Operational Features

41-001561-00 REV00 – 10.2014 6-34

Examples

There are two ways to format the XML key URI:

For XML Post Messages

Example:

For XML Key Scripts

Example:

<Label>Keypad1</Label>

</SoftKey>

Domain Name System (DNS) Server Pre-caching Support

The IP phones now support the use of a local DNS host file to resolve DNS queries, and supports pre-provisioning of DNS

SRV records. This feature allows administrators to configure the phone to download a text file which contains persistent

DNS “A record” hostname to IP address mappings. In addition, support for persistent DNS “SRV records” has been added to

permit SRV based high availability of services.

There are two methods used to configure DNS pre-caching on the IP phone:

• Configure a unix style “host” file used instead of a DNS “A query” to resolve hostnames to IP addresses. The host file is

downloaded and cached on the IP phone.

• Configure DNS “SRV queries” for geographic redundancy and failover. The configured SRV entries are used to pre-load

the DNS cache on the IP phone.

Both these methods are configurable using the configuration files only, and are primarily intended for use when a third

party hosting provider delivers SIP services but does not have local access or control of the LAN side DNS infrastructure.

Key:NavDwn Navigation Down Key

Key:NavLeft Navigation Left Key

Key:NavRight Navigation Right Key

Function Keys (only if physically configured on the phone or expansion module)

KeyPark Park Softkey

KeyPickup Pickup Softkey

Notes:

• If the URI key is a valid key, the phone executes the key regardless of the current state on the phone.

• Park and Pickup XML URI softkeys are available ONLY if these features are physically configured on the phone or

expansion module.

Note:

Time-to-Live (TTL) used in this feature is hard-coded for each server and not configurable.

XML Key URI Description