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Linksys SPA921 Cisco Small Business IP Phone SPA9X1 Administration Guide - Page 33

Bandwidth Requirements1, Installing the SPA900 Series IP Phone, Codec

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Establishing Connectivity • Installing the SPA900 Series IP Phone, page 2-10 Chapter 2 Getting Started Bandwidth Requirements1 Depending on how you have your IP phones configured, each call requires 55 to 110 kbps in each direction. Therefore, using G.729 as the voice codec setting, and with an average business-grade broadband Internet connection supporting 1.5 Mbps downstream and 384 kbps upstream, a total of seven (7) simultaneous conversations can be reliably supported with adequate bandwidth available for file downloads. Linksys recommends using the Linksys IP phone with QoS-capable networking equipment that can prioritize the VoIP application traffic. QoS features are available on many Linksys data networking switches and routers. A QoS-enabled router prioritizes the packets going upstream to the ISP. Table 2-1 illustrates the bandwidth budget using different codecs. Table 2-1 Ethernet Bandwidth Budget for Off-Net VoIP Calling Codec G.711 G.726-40 G.726-32 G.726-24 G.726-16 G.729 Approximate bandwidth budget for each side of conversation 110 kbps 87 kbps 79 kbps 71 kbps 63 kbps 55 kbps 2 calls 220 kbps 174 kbps 158 kbps 142 kbps 126 kbps 110 kbps 4 calls 440 kbps 348 kbps 316 kbps 284 kbps 252 kbps 220 kbps 6 calls 660 kbps 522 kbps 474 kbps 426 kbps 378 kbps 330 kbps 8 calls 880 kbps 696 kbps 632 kbps 568 kbps 504 kbps 440 kbps This table is based on the following assumptions: • Bandwidth Calculated with No Silence Suppression • 20 Millisecond of payload per RTP packet Note The use of silence suppression can reduce the average bandwidth budget by 30% or more. For more information about bandwidth calculation, refer to the following websites: http://www.erlang.com/calculator/lipb/ http://www.packetizer.com/voip/diagnostics/bandcalc.html Installing the SPA900 Series IP Phone This section describes how to install and verify operation of SPA900 Series IP phones. Check to make sure that you have the following package contents: • Linksys 900 Series phone • Ethernet cable • Power adapter (must be ordered separately for PoE units: SPA922, SPA942, and SPA962) 2-10 Linksys IP Phone Administrator Guide Firmware Version 5.1

Section	Page
Preface	10
Document Audience	10
Related Documentation	11
Technical Support	11
Introducing Linksys IP Phones	12
Overview	12
Linksys IP Phone Features	13
SPA901 Features	14
SPA92x, SPA94x, SPA962	15
Ensuring Voice Quality	15
Feature Descriptions	16
SIP Proxy Redundancy	16
Supported Codecs	16
Other Features	18
Technology Background	19
Session Initiation Protocol	20
Using Linksys IP Phones with a Firewall or Router	20
Network Address Translation	21
NAT Overview	21
NAT Types	22
Simple Traversal of UDP Through NAT (STUN)	22
SIP-NAT Interoperation	23
Getting Started	24
Linksys 900 Series IP Phones	24
Caring for Your Hardware	25
SPA901	25
Front Panel and Side of Phone	26
Back Panel	26
SPA92x, SPA94x, and SPA962 Hardware Features	26
SPA921	27
Front Panel	27
Back Panel	28
SPA922	28
SPA932	28
SPA941	29
Front Panel	30
Back Panel	30
SPA942	30
SPA962	31
Front Panel	32
Back Panel	32
SPA9000 IP PBX System	32
Establishing Connectivity	32
Bandwidth Requirements1	33
Installing the SPA900 Series IP Phone	33
Assembling the Phone and Connecting to the Network	34
Attaching the Desk Stand	34
Mounting the Phone to the Wall	34
Turning on the Phone	35
Using the Administration Web Server	35
Connecting to the Administration Web Server	35
Administrator Account Privileges	36
Web Interface URLs	37
Upgrade URL	37
Resync URL	37
Reboot URL	38
Provisioning	38
Provisioning Capabilities	38
Configuration Profile	38
Using the Interactive Voice Response Interface	39
Using the IVR Menu on a Linksys SPA901 Phone	39
IVR Options	40
Entering a Password through the IVR	42
Managing Linksys IP Phones	44
Using the 900 Series LCD Display	44
SPA900 Series LCD Display Controls	44
Using Soft Keys	46
Entering and Saving Settings	47
Localization	48
Changing the Display Background (SPA942/962)	50
Using the SPA932 (Sidecar) with the SPA962	51
Configuring the SPA9000 for the SPA932	52
Configuring the Broadsoft Server for the SPA932	52
Configuring the Asterisk Server for the SPA932	53
Configuring the SPA932	54
Monitoring the SPA932	57
Configuring the Web Service	57
Web Interface Basic and Advanced Views	57
Configuration Parameters	57
Notes	58
Data Types	59
RSS Newsfeeds (SPA962)	63
Call Appearances and Extensions	64
Line Key LEDs	65
LED Script	65
LED Script Examples	66
LED Pattern	66
Using Call Features	67
Selecting the Audio I/O Device and Line	67
Making Calls	68
Answering and Ending Calls	68
Hold and Resume	69
Call Waiting	69
Speed Dialing	69
Three-Way Conferencing	69
Attended Call Transfer	70
Blind Call Transfer	70
Call Back	71
Message Waiting Indication (MWI)	71
Accessing Voicemail	71
Muting Calls	71
Shared Call Appearances	72
Personal Directory	72
Caller and Called Name Matching	72
Dialing Assistance	73
Supplementary Services	73
Call Logs	73
Audio Volume Adjustment	74
Managing Ring Tones	75
Configuring a Dial Plan	76
Dial Plan Digit Sequences	76
Dial Plan Rules	77
Digit Sequence Syntax	77
Element Repetition	77
Sub-sequence Substitution	77
Intersequence Tones	78
Number Barring	78
Interdigit Timer Master Override	78
Local Timer Overrides	78
Pause	78
Dial Plan Examples	78
Dial Plan Timers	79
Interdigit Long Timer	79
Interdigit Short Timer	80
Dial Plans	80
System Administration	80
Reboot and Restart	80
Factory Reset	81
Password Protection	81
Managing the Time/Date	81
Daylight Saving Time	81
Using Star Codes to Activate/Deactivate Services	82
Disabling Services	84
Error and Log Reporting	85
Troubleshooting FAQ	85
SPA900 Series LCD Command Reference	88
Entering Names and Numbers into the Directory	89
Entering Directory Names, Numbers and Ring Default	89
2 Speed Dial	90
3 Call History	90
Redial List	91
Answered Calls	91
Missed Calls	91
4 Ring Tone	91
5 Preferences	91
5.1 Block Caller ID	92
5.2 Block Anonymous Call	92
5.3 Do Not Disturb	92
5.4 Secure Call	93
5.5 Dial Assistance	93
5.6 Preferred Audio Device	93
5.7 Auto Answer Page	93
5.8 Send Audio To Speaker	93
5.9 Time Format	94
5.10 Date Format	94
5.11 Miss Call Shortcut	94
5.12 Call Waiting	94
6 Call Forward	94
6.1 CFWD All Number	95
6.2 CFWD Busy Number	95
6.3 CFWD No Ans Number	95
6.4 CFWD No Ans Delay	95
7 Time/Date	95
8 Voice Mail	96
9 Network	96
9.1 DCHP	97
9.2 Current IP Address	97
9.3 Host Name	97
9.4 Domain	97
9.5 Current NetMask	97
9.6 Current Gateway	97
9.7 Enable Web Server	98
9.8 Non DHCP IP Address	98
9.9 Non DHCP Subnet Mask	98
9.10 Non DHCP Default Route	98
9.11 Non DHCP DNS 1	98
9.12 Non DHCP DNS 2	98
9.13 Non DHCP NTP Server 1	99
9.14 Non DHCP NTP Server 2	99
9.15 Multicast Address	99
9.16 Enable VLAN	99
9.17 VLAN ID	99
9.18 CDP	100
10 Product Info	100
10.1 Product Name	100
10.2 Serial Number	100
10.3 Software Version	100
10.4 Hardware Version	101
.10.5 MAC Address	101
.10.6 Client Cert	101
10.7 Customization	101
11 Status	101
Phone	102
Ext 1/2/3/4	102
Line 1, 2,3,4	102
Provisioning	102
Call Statistics History	102
12 Reboot	103
13 Restart	103
14 Factory Reset	103
15 Custom Reset	103
16 Set Password	104
17 Set LCD Contrast	104
18 CallPark Status	104
19 Language (SPA922, 942, and 962)	104
20 GUI Properties (SPA962)	105
21 Web Service (SPA962)	105
Linksys IP Phone Field Reference	106
Info Tab	107
System Information	107
Product Information	107
Phone Status	108
Ext 1/2/3/4/5/6 Status	108
Line 1/2/3/4/5/6 Call 1/2 Status	109
Downloaded Ring Tone	110
System Tab	111
System Configuration	111
Internet Connection Type	111
Static IP Settings	112
PPPoE Settings	112
Optional Network Configuration	112
VLAN Settings	113
SIP Tab	114
SIP Parameters	114
SIP Timer Values (sec)	116
Response Status Code Handling	118
RTP Parameters	118
SDP Payload Types	119
NAT Support Parameters	121
Linksys Key System Parameters	122
Provisioning Tab	123
Regional Tab	124
Call Progress Tones	124
Distinctive Ring Patterns	125
Control Timer Values (sec)	126
Vertical Service Activation Codes	127
Vertical Service Announcement Codes	130
Outbound Call Codec Selection Codes	130
Miscellaneous	132
Phone Tab	135
General	135
Line Key 1/2/3/4/5/6	135
Miscellaneous Line Key Settings	136
Line Key LED Pattern	136
Supplementary Services	138
Ring Tone	139
Auto Input Gain (dB)	140
Extension Mobility	140
Ext Tab	141
General	141
Share Line Appearance	142
NAT Settings	142
Network Settings	142
SIP Settings	143
Call Feature Settings	145
Proxy and Registration	146
Subscriber Information	148
Audio Configuration	148
Dial Plan	151
User	153
Call Forward	153
Speed Dial	153
Supplementary Services	153
Web Information Service Settings (SPA962)	154
Traffic Service Information Settings (SPA962)	154
Audio Volume	155
Phone GUI Menu Color Settings (SPA962 only)	155
932 Tab (SPA962 only)	156
General	156
Unit 1	157
Unit 2	158
SPA932 Status	159
Acronyms	160

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2-10

Linksys IP Phone Administrator Guide

Firmware Version 5.1

Chapter 2

Getting Started

Establishing Connectivity

•

Installing the SPA900 Series IP Phone, page 2-10

Bandwidth Requirements1

Depending on how you have your IP phones configured, each call requires 55 to 110 kbps in each

direction. Therefore, using G.729 as the voice codec setting, and with an average business-grade

broadband Internet connection supporting 1.5 Mbps downstream and 384 kbps upstream, a total of seven

(7) simultaneous conversations can be reliably supported with adequate bandwidth available for file

downloads.

Linksys recommends using the Linksys IP phone with QoS-capable networking equipment that can

prioritize the VoIP application traffic. QoS features are available on many Linksys data networking

switches and routers. A QoS-enabled router prioritizes the packets going upstream to the ISP.

Table 2-1

illustrates the bandwidth budget using different codecs.

This table is based on the following assumptions:

•

Bandwidth Calculated with No Silence Suppression

•

20 Millisecond of payload per RTP packet

Note

The use of silence suppression can reduce the average bandwidth budget by 30% or more.

For more information about bandwidth calculation, refer to the following websites:

http://www.erlang.com/calculator/lipb/

http://www.packetizer.com/voip/diagnostics/bandcalc.html

Installing the SPA900 Series IP Phone

This section describes how to install and verify operation of SPA900 Series IP phones.

Check to make sure that you have the following package contents:

•

Linksys 900 Series phone

•

Ethernet cable

•

Power adapter (must be ordered separately for PoE units: SPA922, SPA942, and SPA962)

Table 2-1

Ethernet Bandwidth Budget for Off-Net VoIP Calling

Codec

Approximate bandwidth budget for

each side of conversation

2 calls

4 calls

6 calls

8 calls

G.711

110 kbps

220 kbps

440 kbps

660 kbps

880 kbps

G.726-40

87 kbps

174 kbps

348 kbps

522 kbps

696 kbps

G.726-32

79 kbps

158 kbps

316 kbps

474 kbps

632 kbps

G.726-24

71 kbps

142 kbps

284 kbps

426 kbps

568 kbps

G.726-16

63 kbps

126 kbps

252 kbps

378 kbps

504 kbps

G.729

55 kbps

110 kbps

220 kbps

330 kbps

440 kbps