Specifications

C-1

Cisco Unified IP Phone Services Application Development Notes

OL-22505-01

APPENDIX

Device Capability Query Via CTI

Feature Description

A backend CTI application that communicates with the phone via the UserData tunnel, cannot retrieve

information on device capabilities such as XSI feature support on a phone. Due to this lack of

information, and to ensure compatability, only a minimum set of features were generally configured.

The new Device Capability Query via CTI feature overcomes this limitation. This new feature allows a

CTI-based application or a Cisco Unified Communications Manager application to query a registered

phone for device capabilities via the UserData tunnel interface of the phone (over SCCP or SIP and

RemoteCC).

Applications that have a HTTP interface with a phone do not have this limitation. The HTTP request

from such phones include XSI capabilities header, and the DeviceInformationX servlet of such phones

can be accessed to retrieve other device information.

Although designed to work via CTI over the UserData tunnel, this feature can also work over HTTP

using the POST method.

Supported IP Phones and Codecs

Table 1 lists the Cisco Unified IP Phone models that support the Device Capability Query via CTI

feature:

Table legend:

• —Supported

• —Not supported

Table 1 Phone Models that Support the Device Capability Query via CTI Feature

Phone Model Supported/Not Supported Firware Supported

9900 Series Phones

9971 9.0(1) and later

9951 9.0(1) and later

8900 Series Phones

8961 9.0(1) and later

7900 Series Phones