Starplus Triad Xts Installation Digital Key Telephone System Instructions Guide

							InstallationD-5
Appendix D - Voice Over the Internet Protocol
Installation
Multiple connection types can be used to implement theDiscoveryVoIP card in the business
environment. The speed of a network connection is measured in bandwidth or kilobytes per
second (K or kbs). Business connections generally have a speed of 256K or greater. In
comparison, a home user dialing into the Internet with a modem can reach a maximum
speed of 56K.
The two main types of connections are managed and unmanaged. A managed connection is
a private connection with a guaranteed amount of bandwidth. In this type of connection, the
connection is completely managed by the business. This might be compared to a parking lot
that is for employee use only. An unmanaged connection, however, is one that shares
bandwidth with other users. The Internet is the best example of this type of connection. The
Internet connects many different businesses, but no one is able to control the data travelling
on the Internet. In this case, the performance of the connection depends on how many
people are using the Internet. It is like a freeway, in that travel is slower when traffic is heavy
and faster when traffic is light.
Hardware Requirements

						

							D-6Installation
Appendix D - Voice Over the Internet Protocol
Technical Data
Lower bandwidths, lower connection reliability, and high network latency will decrease
DiscoveryVoIP performance. Bandwidths lower than 256K and network latency higher than
120 ms may cause unacceptable performance. Intermittent fluctuating connections (i.e.,
some wireless broadband connections) will cause unacceptable performance problems.
Have your network administrator check your network performance and bandwidth to
determine your network constraints before installing theDiscoveryVoIP card.
Recommended Bandwidths
The following table shows the recommended and minimum bandwidths for use with
DiscoveryVoIP. The values are based on the number of ports.
Table D-1: Bandwidths
Voice Encoder Information
There are four built-in voice encoding standards (vocoders) in theDiscoveryVoIP card. The
most bandwidth-efficient standard is G.723.1 due to its compression technology. The highest
voice quality is provided by the G.711 standard (both A-law and U-law) because no
compression is used. The G.729 standard is between the G.723.1 and G.711 standards in
terms of bandwidth usage and performance. The G.729 standard loses some voice quality
due to the use of compression. The default vocoder standard is G.723.1 to conserve
bandwidth.
TheDiscoveryVoIP card intelligently handles incoming VoIP calls by negotiating with the
initiating system to determine the preferred vocoder standard to use during that call. For
example, a system that is set for the default standard (G.723.1) can initiate a call with another
system set to the G.711 A-law standard. The entire call will be established with the G.723.1
standard. The same is true for a G.711 A-law system establishing a call with the G.723.1
system. In this case, the G.711 A-law standard will be used for that call. Lower bandwidth
connections, however, may be saturated when using the G.711 standards.
2 Ports 4 Ports 6 Ports 8 Ports
Recommended
512K 640K T1 T1
Minimum
256K 256K 512K 512K
Note: Assumes network latency is below 120 ms 
						

							InstallationD-7
Appendix D - Voice Over the Internet Protocol
The following chart shows the bandwidth consumption by vocoder.
Figure D-1: Bandwidth Consumption by Vocoder
IP Phones
IP phones using the H.323 Revision 2 protocol will work with theDiscoveryVoIP card. The IP
phone, however, will not be integrated into the system. Instead, the IP phone resembles a
single-line telephone that uses the Internet or other IP network instead of the PSTN. IP
phones allow dialing using the IP address of the destination system. Most IP phones allow the
user to program a button with the IP address of the system to dial. This allows the user to dial
in to the VoIP card where they are directed to the attendant. The attendant then transfers the
user to the desired extension.
The vocoder standards may not be as flexible for the IP phone as theDiscoveryVoIP card.
Ensure that the vocoder standards used on the KSU match the standards that are used on the
IP phone. For example, a phone that uses only
the G.711 U-law standards can initiate a call
with anyDiscoveryVoIP card. However, for a call to be initiated successfully by the KSU to the
IP phone used in this example, the KSU default standard (G.723.1) must be changed to the
G.711standard.
Not all IP phone manufacturers have adopted the H.323 Revision 2 standard. Therefore,
Vodavi cannot guarantee the compatibility or performance of IP phones.
Bandwidth Usage (Kbs)
Bandwidth Usage per Port
Bandwidth Requirements 
						

							D-8Installation
Appendix D - Voice Over the Internet Protocol
Quick Start
This quick-reference diagram shows the configuration necessary to connect theDiscovery
VoIP card to the Internet, WAN network, or VPN network:
Figure D-2:DiscoveryVoIP Card Connection Diagram
KSU w/ VoIP Card
(Destination)
KSU w/ VoIP Card
(Source)
-or- 
ROUTER-or-
 
 
ROUTER CABLE/DSL MODEM
INTERNET
(e.g., DSL or Cable),
WAN
(e.g., T1 or Frame Relay),or
VPN
 CABLE/DSL MODEM 
						

							ProgrammingD-9
Appendix D - Voice Over the Internet Protocol
Programming
The following Table shows the Network programming requirements.
Identifying the VoIP Card (FLASH 24)
TheDiscoveryVoIP card can be placed in slots 1-7 of Cabinet 0 and in slots 0-8 of Cabinet 1
and Cabinet 2. Once the slot is identified, it takes the required time slots and deducts them
from the available ones. It activates all 8 circuits. If more then one card is identified, each card
is identified in the same manner and it requires its own unique IP address.
1. While in the programming mode, dial [FLASH 24].
2. Press the button that corresponds with the Cabinet location of the VoIP card
(Button #17-19 represents Cabinets 0, 1, and 2).
3. Press the button corresponding to the desired slot location. Buttons 1-9 indicate
peripheral card slots 0-8.
4. Dial the code (12) for the VoIP card and press HOLD.
Table D-2: VoIP Card Network Programming Requirements
Requirement Description
IP Address(es) An IP Address is required to properly program a
DiscoveryVoIP card in
the KSU. If the Internet will be the connection medium, an Internet
routable address is necessary. The network administrator should be
able to provide this address.
Subnet Mask A Subnet Mask is required to establish communications between
endpoints. This address is critical to establish a connection between
two or more switches. The
DiscoveryVoIP card will not function
without it.
Router An address must be supplied for the Gateway Router to provide
connectivity. If no router exists between the KSUs (i.e., an internal LAN
setup), then the other router’s IP address should be programmed here.
Domain Name The Domain Name is entered in Database Administration programming
as follows:name.com (e.g., vodavi.com).
The“www”is not needed for programming. A dot or period (“.”)is
added by dialing [24].
Vocoder This command is used to change the default audio capability. When
establishing a call, the system making the call requests the preferred
audio capability from the receiving system and negotiates the audio
encoding to be used. This setting defines that preferred audio
encoding.
CAB 0 SLOT 04 00-14
VOIP 
						

							D-10Programming
Appendix D - Voice Over the Internet Protocol
Entering Network Programming Requirements (FLASH 46)
Flash Code 46 is for the specific network programming requirements for theDiscoveryVoIP
card. IP address, subnet and router address information must be entered for the VoIP card to
work. Each card installed in the system requires a separate IP address and subnet mask. The
router address and domain name may be shared. See your network administrator for
networking information.
1. Enter programming mode and dial [FLASH 46].
2. Enter the Cabinet number followed by the slot number where theDiscoveryVoIP card is
installed twice (e.g., 0404 for a VoIP card installed in slot 4 of Cabinet 0) and press HOLD.
3. Press Button #1, enter the IP address for the card, then press HOLD to save the entry.
When entering an IP Address, the“
✳”key on the telephone acts the same as the 
key on a computer. An IP address can be entered using zeros where there is no number.
For example: 10238
✳56✳1 can be entered 102038056001, thus eliminating the need for
using the“
✳”key. Either entry will display: 102. 038. 056. 001 (a zero is displayed as a
“space”or“Null”character).
4. Press Button #2, enter Subnet Mask, then press HOLD to save the entry.
A Subnet Mask of 255.255.255.0 is entered as 255255255 + [HOLD]; the telephone will
display 255.255.255., which is correct.
5. Press Button #3, enter Router IP address, then press HOLD to save the entry.
The first two digits indicate the FROM Cabinet/slot where the programming will come from.
The second two digits indicate the TO Cabinet/slot (i.e., the programming destination). This
method is used to provide for future functionality.
04-04 PAGE A
ENTER BUTTON NUMBER
IP ADDRESS
102.038.056.001
Each card requires its own IP address and its own Subnet Mask, using the standard format
for each: xxx.xxx.xxx.xxx Without these numbers, the VoIP card will not operate and will
show as Out of Service (OOS) in the system.
SUBNET MASK
255.255.255.
ROUTER ADDRESS
102.038.056.100 
						

							ProgrammingD-11
Appendix D - Voice Over the Internet Protocol
6. Press Button #4, enter Domain Name (up to 64 characters), then press HOLD to save the
entry.
The domain name is entered in standard Vodavi format:

						

							D-12Programming
Appendix D - Voice Over the Internet Protocol
Networking Tables (FLASH 16)
Networking Tables identify the system number (01-16), the CO or line Group (00-23), the
range of station numbers (from xxxx to xxxx), and the IP address for each system. The system
number is a database identifier. The CO or line group identifies the line group the system
should access when the associated extension number is dialed. The extension range defines
the extensions that can be reached at the associated remote system. The IP address provides
the IP information of the remote system that is associated to the extension range, CO or line
group, and the system number.
When a specific extension is dialed, the system looks up the extension in the networking
table to determine the line group to use. The line group is then accessed and theDiscovery
VoIP card establishes the IP connection to the remote system using the associated IP address.
1. Enter programming, then dial [FLASH 16].
2. Enter the system to be modified (01 to 16).
3. Press the appropriate button listed below to modify the table.
Make sure that your 4-digit dialing plans on the remote systems do not conflict with your local
dialing plan. If there is a conflict, users will be required to access the VoIP line group first and then
dial the remote extension. Otherwise, dialing the 4-digit extension directly will connect the caller
to a local system extension and not the remote system extension. For example, if System A uses
extensions 1000-1099 and System B uses 1000-1099, a user on either system could not dial the
remote system directly because local system extensions take precedence over remote system
extensions. In this case, a user would have to access the
DiscoveryVoIP line group and dial the
remote system extension to bypass the local system’s dialing plan.
The
DiscoveryVoIP CO’s default into Line Group 1. The line group may need to be changed for
proper operation on your particular system. Refer to the FLASH 40 programming section for
more information on changing line groups.
Button 1 - Line group programming (00 to 23).
Button 2 - Station from (start) range–must be 4 digits.
Button 3 - Station to (end) range–must be 4 digits.
Button 4 - IP address to dial when any station within that range is dialed. For
example, if station 3001 is dialed, the telephone switch connects
the call using the IP address: 102. 38. 56. 1 (refer to
Ta b l e D - 3)
Button 22 - Page to next Networking table.
Button 23 - Page to previous Networking table.
Button 24 - Enter a new Networking table. 
						

							ProgrammingD-13
Appendix D - Voice Over the Internet Protocol
Conditions
»Feature access codes must not conflict with station numbering.
»CO line numbers are fixed and cannot be changed other than the current FLASH 42
reassignment.
»The VMID digits need to be programmed separately.
»The SMDR will output up to 4-digit numbers in the station field. If less than 4 digits are
selected in the numbering plan, leading spaces will be added in place of numbers. Call
Accountingdevicesneedtobeconfiguredtoaccept4digits.
»When systems are tied together, each system has to have access to 911 through local
lines.
Table D-3: System Networking Tables
System CO GroupStation Range
From ToIP Address
01 1 1000 1200 172.016.016.001
02 2 2000 2400 209.054.002.001
03 2 3000 3500 102.038.056.001
04
05
06
07
08
15
16 
						

							D-14Operation
Appendix D - Voice Over the Internet Protocol
Operation
TheDiscoveryVoIP card operates like all other Central Office cards. There are up to 8 lines per
card, and each line functions as any other CO line functions. It allows bi-directional
communication and monitors for disconnect while using minimal bandwidth. It also allows
four-digit dialing and other features.
When usingDiscoveryVoIP lines: