Cisco IP Telephony: Planning, Design, Implementation, Operation, and Optimization [Electronic resources] نسخه متنی

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User Requirements for Phone Features

This section evaluates the end users' requirements for the Cisco IP Phones. Appendix A lists the currently available Cisco IP Phone models and describes the features that are available in each model. The cost of the Cisco IP Phones ranges from $100 to $1000 depending on the model. It is important to choose the right model because the purchase price has a direct impact on the total cost of the project.

Limiting the number of IP Phone models to one or two in the network reduces operational overhead. If you deploy varying phone models, operational staff has to be trained to support the varying phone models.

The questions in Table D-1 will help you to gather the end users' requirements and decide on the IP Phone model and features to enable for each user group. Use the employees' business functions to place them into user groups. For example, the following classification is commonly used:

Table D-1. IP Phone Requirements
No.	Question	User Group 1	User Group 2	User Group 3
1	Do you require support for Cisco Power over Ethernet (PoE) or IEEE 802.3af inline power? This decision has to be made globally and should not depend on the user groups.	Cisco PoE IEEE 802.3af PoE Both
Basic Phone Features
2	Place calls using handset	Yes No	Yes No	Yes No
3	Support for external headset	Yes No	Yes No	Yes No
4	Speaker phone support	Yes No	Yes No	Yes No
5	Set Call Forward All to another number from the IP Phone	Yes No	Yes No	Yes No
6	Redial the last number dialed	Yes No	Yes No	Yes No
7	View list of previously dialed numbers	Yes No	Yes No	Yes No
8	View list of missed calls	Yes No	Yes No	Yes No
9	View list of received calls	Yes No	Yes No	Yes No
10	MWI to indicate new voice-mail messages	Yes No	Yes No	Yes No
11	Number of lines required on the phone
12	Number of calls required per line
13	Supplementary features such as Hold, Conference, and Transfer	Yes No	Yes No	Yes No
14	Call Park	Yes No	Yes No	Yes No
15	Meet-Me	Yes No	Yes No	Yes No
16	Call Pickup and Group Pickup	Yes No	Yes No	Yes No
17	Call Waiting	Yes No	Yes No	Yes No
18	Call Forward Busy (CFB) to Voice Mail	Yes No	Yes No	Yes No
19	Call Forward No Answer (CFNA) to Voice Mail	Yes No	Yes No	Yes No
20	Auto Answer	Yes No	Yes No	Yes No
21	Display the calling party number and name	Yes No	Yes No	Yes No
22	Number of speed dials required on the IP Phone
Advanced Features
23	PC connectivity required from the IP Phone	Yes No	Yes No	Yes No
24	Support of XML services on the IP Phone, such as Personal Address Book (PAB), Fast Dials, corporate directory lookup, etc.	Yes No	Yes No	Yes No
25	Support of Cisco IPMA feature on the IP Phone	Yes No	Yes No	Yes No
26	Call Back	Yes No	Yes No	Yes No
27	Extension Mobility feature support	Yes No	Yes No	Yes No
28	Wireless support	Yes No	Yes No	Yes No
29	Customized ring tones on IP Phones	Yes No	Yes No	Yes No
30	Color display or black-and-white display on the IP Phone	Yes No	Yes No	Yes No
31	Touch-screen display functionality on the IP Phone	Yes No	Yes No	Yes No
32	Is Gigabit Ethernet connectivity to the upstream LAN switch and to the PC a requirement?	Yes No	Yes No	Yes No

Employee phones (User Group 1)

Manager phones (User Group 2)

Assistant/operator phones (User Group 3)

Lobby/break room phones (User Group 4)

Conference room phones (User Group 5)

Some of the common requirements of the preceding groups are as follows:

Employee, manager, and assistant phones require PC connectivity.

Lobby phones and conference room phones do not require the Call Forward to Voice Mail, Call Forward Busy to Voice Mail feature enabled on the CallManager.

Managers and assistants require more lines on the phones than do employees.

Lobby phones and conference room phones generally do not require multiple lines on the phone.

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Cisco IP Telephony: Planning, Design, Implementation, Operation, and Optimization [Electronic resources] - نسخه متنی

Ramesh Kaza; Salman Asadullah

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User Requirements for Phone Features

Table D-1. IP Phone Requirements