Panasonic Kx Tda0490 Getting Started Manual

							Getting Started 41
Section 4
Programming the PBX
This section details the procedure to program the PBX to use 
the VoIP Gateway Card. 
						

							4.1 Programming the PBX in the Los Angeles Office
42 Getting Started
4.1 Programming the PBX in the Los Angeles 
Office
For successful operation of a VoIP network using the VoIP Gateway Card as a QSIG network 
interface, the PBX at each location in the network must be programmed appropriately. For a detailed 
discussion of related features, refer to the Hybrid IP-PBX Feature Guide.
This section details the procedure to program the PBX in the Los Angeles office. After the PBX in the 
Los Angeles office has been fully programmed, repeat the procedure for the PBX in the Chicago 
office with the appropriate setting values.
Note
It is assumed that you have already installed the KX-TDA Maintenance Console (PC 
programming software of the PBX) in your PC.
1.Start the KX-TDA Maintenance Console from the 
Start menu.
2.
a.Type the Installer Level Programmer Code 
(default: INSTALLER).
b.Click OK.
3.
a.Click Connect → RS-232C or USB.
b.In the next screen, type the system password 
for installer (default: INSTALLER).
c.Click OK.
The program menu appears.
4.
a.Double-click Configuration.
b.Double-click IP-GW Port.
Confirm that por ts 1 through 8 are in service 
(INS). 
						

							4.1 Programming the PBX in the Los Angeles Office
Getting Started 43
Note
For details about network parameter settings, refer to the relevant sections of the Hybrid IP-PBX 
Feature Guide.5.
a.Double-click CO & Incoming Call.
b.Double-click CO Line Setting.
c.Type the CO Name and assign an unused 
Trunk Group Number to be used for all VoIP 
gateway trunks (CO lines).
d.Click OK.
6.
a.Double-click System.
b.Double-click Numbering Plan.
c.Double-click Feature.
d.In the Tie Line Access box, type the dialing 
number.
e.Click OK.
7.
a.Double-click Private Network.
b.Double-click TIE Table.
c.In the Own PBX Code box, type 35 (the PBX 
code of the local PBX in the network).
d.In the Leading Number box, type 41 (the PBX 
code of the remote PBX in the network).
e.In the corresponding Trunk Group list, click the 
number of the trunk (CO line) group to be used 
when making calls.
f.Set the number modification pattern, if 
necessary.
g.Click OK.
8.
a.Double-click Configuration.
b.Double-click Slot.
c.Click Status of the card.
d.Set the status to OUS.
e.Click Card Type of the card.
f.In the Va l u e list, click Overlap (default) or En-
bloc
*1.
g.Click OK.
h.Click Status of the card.
i.Set the status to INS.
*1When En-bloc is selected, you need to press # after dialing the phone number. 
						

							4.1 Programming the PBX in the Los Angeles Office
44 Getting Started 
						

							Getting Started 45
Appendix A
Guidance for VoIP Installation 
						

							A1 VoIP Requirements
46 Getting Started
A1 VoIP Requirements
A1.1 Bandwidth Assessment
When using the VoIP Gateway Card, you must ensure that the IP network in use has enough 
bandwidth to support VoIP communications. If the amount of bandwidth required for VoIP 
communications is larger than what the network can accommodate, speech quality will be 
compromised. In addition, there may be some adverse effect on the performance of other applications 
(e.g., email or web applications) that use the same network. Therefore, care must be taken when 
assessing bandwidth requirements.
Inform your network administrator of the required bandwidth, and make sure that the network can 
suppor t VoIP communications even under conditions of maximum network traffic.
Bandwidth Calculation
Provided below is the formula to find out the amount of bandwidth required for VoIP communications:
Required bandwidth for one VoIP channel is shown in the tables below (for more details, refer to 2.2.3 
Voice Communication Parameters in the VoIP Gateway Card Programming Guide).
Required Bandwidth for One VoIP Channel
The required bandwidth depends on what combination of CODEC and packet sending interval is 
used. Keep in mind the following points about the type of CODEC and packet sending interval, in 
terms of the speech quality:
 The speech quality of the CODECs varies as follows: (High) G.711, G.729A, G.723.1 (Low)
 The shorter the packet sending interval, the higher the speech quality.
 The higher the speech quality the VoIP Gateway Card provides, the more bandwidth the 
card requires.
Via LANRequired Bandwidth
= (No. of Fax Machines × Required Bandwidth for the G.711 CODEC) +
[(16 - No. of Fax Machines) × Required Bandwidth for Voice Communication]
CODECPacket Sending Interval
20 ms 30 ms 40 ms 60 ms 90 ms
G.711 87.2 kbps 79.5 kbps 75.6 kbps 71.7 kbps —
G.729A 31.2 kbps 23.5 kbps 19.6 kbps 15.7 kbps —
G.723.1 5.3 kbps — 20.8 kbps — 13.1 kbps 10.5 kbps
G.723.1 6.3 kbps — 21.9 kbps — 14.1 kbps 11.6 kbps 
						

							A1 VoIP Requirements
Getting Started 47
Via WAN (PPP: Point-to-Point Protocol)
Example
Consider the following case as an example:
 Communication: via LAN
 No. of Fax Machines: 2
 G.711 Packet Sending Interval: 20 ms (requiring 87.2 kbps per channel)
 G.729A Packet Sending Interval for Voice Communication: 20 ms (requiring 31.2 kbps per 
channel)
In this case, the required bandwidth will be as follows:
Therefore, inform your network administrator and make sure that the network can support a 
bandwidth of 611.2 kbps even when the network is under conditions of maximum traffic.
Note
It is recommended that all cards in a VoIP network have the same packet sending interval.
Additional Information
As described above, it is possible to control the required bandwidth by selecting a certain combination 
of CODEC and packet sending interval. However, it is also possible to control required bandwidth by 
limiting the number of available VoIP channels.
The card supports a total of 8 ports, each having 2 separate channels. By disabling some of the ports, 
you can reduce the bandwidth required for VoIP communications.CODECPacket Sending Interval
20 ms 30 ms 40 ms 60 ms 90 ms
G.711 84 kbps 77.3 kbps 74 kbps 70.7 kbps —
G.729A 28 kbps 21 kbps 18 kbps 14.7 kbps —
G.723.1 5.3 kbps — 18.7 kbps — 12 kbps 9.8 kbps
G.723.1 6.3 kbps — 19.7 kbps — 13.1 kbps 10.8 kbps
Required Bandwidth
= (2 × 87.2) + [(16 - 2) × 31.2]
= 611.2 (kbps) 
						

							A1 VoIP Requirements
48 Getting Started
To limit the number of VoIP channels:
 Set the status of the ports you wish to disable (starting from the highest-numbered port) to OUS.
For example, if you wish to use only 10 of the available 16 VoIP channels (i.e., disable 6 
channels), set the ports 8, 7, and 6 to OUS as shown below:
In this case, the equation for bandwidth calculation, based on the previous example, will be changed 
as follows:
A1.2 Network Configuration
You must evaluate the structure of the existing network to see if a VoIP network can be implemented. 
Below are the points that should be taken into your evaluation.
Is the IP network a managed network?
A VoIP network should be implemented on a managed IP network such as Frame Relay, Leased Line, 
or IP-VPN (Virtual Private Network).
An unmanaged network, such as the Internet (including an Internet VPN), cannot be used to employ 
a VoIP network because delays and loss in data transmission can cause huge degradation in speech 
quality.Required Bandwidth
= (No. of Fax Machines × Required Bandwidth for the G.711 CODEC) +
[(10
 - No. of Fax Machines) × Required Bandwidth for Voice Communication]
= (2 × 87.2) + [(10
 - 2) × 31.2]
= 424 (kbps) 
						

							A1 VoIP Requirements
Getting Started 49
Is it possible to have static IP addressing?
Because the maintenance of the VoIP Gateway Card is carried out from a personal computer (PC) 
through an IP network, the card must be assigned a static IP address.
Static IP addressing must be made possible even when the DHCP feature is used. For more details, 
refer to 2.2.1 Network Parameters in the VoIP Gateway Card Programming Guide.
Is network address translation (NAT/NAPT) disabled?
In a network where address translation techniques (e.g., NAT/NAPT) are used to convert between 
global and local IP addresses, VoIP communications based on the H.323 protocol cannot be carried 
out appropriately. Generally, NAT/NAPT are features that are available with routers.
Note
If the router on the network supports the H.323 NAT feature, it may be possible to have VoIP 
communications over the network. For more information, consult your network administrator.
Router
(NAT/NAPT enabled)
IP Network
Global IP Address Domain
Local IP Address Domain 
						

							A1 VoIP Requirements
50 Getting Started
Does only a single router provide access to the IP network?
In a dual network, 2 routers provide access to the IP network as shown in the diagram below. 
However, the VoIP Gateway Card cannot take the advantage of having 2 routers as access points to 
the IP network.
For example, if router A, whose IP address is assigned as the default gateway IP address of the card, 
fails, VoIP communications are no longer possible; the card is not able to switch its default gateway 
from router A to router B to access the IP network. For more details about the default gateway setting, 
refer to 2.2.1 Network Parameters of the VoIP Gateway Card Programming Guide.
IP Network
Router A Router B
Default gateway 
of the card: 
Router A