KX-TDA200/100 System (Ver.1.0)

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KX-TDA200/100 System (Ver.1.0)
Chapter 12.1VoIP General

• Panasonic Communications Co., Ltd.
• Network Business Company
• Edition 1.1 27 Jan., 2003

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Chapter 12.1
VoIP
1. What is VoIP? 1.1 What is the advantage?
1.2 What are characteristics? 1.3 What is
the difference VoXX? 2. What is the existing IP
Telephone Service? 3. What is IP network for
VoIP? 4. What is the protocol of ITU-T H.323?
5. What is the connection type of VoIP? 6. What
is KX-TDA0480(VoIP Gateway Card)? 6.1 Where
are the benefits of KX-TDA0480? 6.2 How is the
connection of KX-TDA0480? 6.3 How is the
construction of KX-TDA0480? 6.4 What are the
KX-TDA0480 Functions? 7. What are Router
Functions for the QOS?







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1.What is VoIP ?
Voice over IP (Internet Protocol) is the
technology for transmission of voice over IP
network.
IP Connectionless communication
Voice signal -gt Packet data
Packet data -gt Voice signal
IP Network
VoIP-GW
VoIP-GW
VoIP is "One of the leased line in the current
state.
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Background
TCP/IP is the de facto standard of Data
Communication
Analog Communication
Digital Communication
Data(Packet) Communication
T1/E1/ISDN
VoIP(VoFR/VoATM)
Internet increases explosively, and has gained in
popularity. And as Data (IP) traffic increases,
it can pass the voice traffic.
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Traffic of Communication
Tera Byte
Data communication
700,000
Number of Host Computer
X1,000
600,000
Voice
500,000
400,000
97
98
99
00
01
02
03
300,000
200,000
100,000
0
1999
2000
2001
2002
1997
1998
2003
Year
Users of the Internet 3 Billion in the world /
30 Million in Japan
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1.1 What is the advantage of VoIP?
It is possible to reduce the cost of line and
telephone calls by the integration of voice and
data.
Public Line
Leased Line
PBX
PBX
PT/SLT
PT/SLT
IP-Network
SW HUB
Router
SW HUB
Router
The capacity of the line increases for voice data
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1.2 What are Characteristics of VoIP?

• (1)Connectionless communication(IP,UDP)
• The communication route cannot be secured.
• (2)Best effort type communication
• The quality is not guaranteed, when the
  traffic
• becomes congested. (Telephone network is
• Guarantee Type communication)
• (3)QOS(Service quality) is weak
• - Delay Time
• - Jitter
• - Packet loss
• Therefore, it is necessary to implement
  the VoIP in
• the network where QoS is controlled.
• (4)Overhead is large
• The header of the IP is long compared
  with the
• header of the ATM and the Frame Relay.
• Therefore, it reduces the delay time by
  the router
• in the header compression.

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1.3 What is the difference with VoXX?(1/2)
Good
Quality of Voice
Size of Network
Large
ltReason why VoIP is activatedgt (1) IP is based
on high layer, and it is possible to use without
the restriction of the line type. (2)The
range of application is wide and the
extendibility is also high. (3)The quality of
the VoIP device improved, and the price became
reasonable.
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1.3 What is the difference with VoXX?(2/2)
(1) VoIP
VoIP over FR
PBX
V
I
F
PT/SLT
Layer2
Layer4
Layer3
Router
or
VoIP over ATM
V
I
A
Layer2
Layer4
Layer3
FR/ATM Line
FR/ATM Line
(2) VoFR
PBX
V
F
Layer3
Layer2
PT/SLT
FRAD
FRAD
FR Line
FR Line
Frame Relay or ATM Network
(3) VoATM
PBX
ATM Line
ATM Line
V
A
PT/SLT
Layer3
Layer2
ATM
ATM
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2.What is the existing IP Telephone Service
?(1/2)
(1) Internet Telephone Service(PC to PC)
Application -Netscape Navigator -Cool
Talk -Internet Phone
Broadband line(ADSL etc.)
(2) IP telephone service
Proper network
Local Switch
Local Switch
Router
Router
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2.What is the existng IP Telephone
Service?(2/2)
(3) IP-VPN Service/MPLS(Multi Protocol Label
Switching)
PBX
PT/SLT
IP-VPN
MPLSConnection type service and has the security
function
(4) Leased line Service
PBX
Digital Leased line
PT/SLT
Router
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3.What is IP network for VoIP?

• (1) Digital Leased Line
• (2) IP-VPN
• (3) Frame Relay(VoIP over FR)
• (4) Internet
• We dont recommend to use, because Internet
  is
• the network type of Best effort and QoS
  is not
• guaranteed by the following reasons.
• - It is not possible to control the
  network.
• - The delay is large.
• - Non-symmetry network.

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4.What is the protocol of ITU-T H.323?
(1) History of H.323 - V1(NOV., 1996)
Visual telephone systems and equipment for local
area networks which provide a
non-guaranteed quality of service. -
V2(FEB.,1998) Packet-based multimedia
communication systems. (2) H.323 is used as a
control protocol of the IP telephone.
H.323 is the current main system for making the
network IP in the future.
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H.323 System configuration
-Address Conversion -Control t the recognition
of connection -Control the Securing the
bandwidth -Control the zone -Call control -
Permission of Call requirement
T Terminal GK Gatekeeper GW
Gateway MCU Multi point Control Unit R
Router
Voice Graphics data Control
Protocol Conversion
T1
T4
T5
GW
GK
T2
T3
R
MCU
R
-Control the Multi Point connection -Processing
of the Multi Point Signaling
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H.323 Call connection proceeding
ltExamplegt
Endpoint 1
Gatekeeper
Endpoint 2
ARQ(1)
ACF/ARJ(2)
Set-up(3)
Call proceeding(4)
ARQ(5)
ACF/ARJ(6)
Alerting(7)
Connect(8)
ARQ Admission Request ACF Admission
Confirm ARJ Admission Reject
RAS(Registration/Admission/Status) Messages
Call Signaling Message
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H.323 Protocol Stack
AV APR.
Call Control and Management
Data APR.
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Voice
Video
H.225.0 (RTCP)
H.225.0 (RAS)
H.225.0 (Q.931)
H.245.
T.124 T.125
H.261
G.711 G.722 G.723G.728 G729
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H.225(RTP)
5
4
UDP
TCP
T.123
Network Layer(IP)
3
Link Layer(MAC/PPP/Q.922)
2
Physical Layer
1
RTP( Real time Transport Protocol ) This treats
the time stamp and the order number to take time
synchronization by transmitting and receiving.
Used for the VoIP
RTCP( Real time Control Protocol ) This
controls the RTP transmission.
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What standards apply to H.323?
Call signaling and control H.323 - Packet-based
multimedia communications systems H.225 - call
control protocol H.235 - security H.245 -
media control protocol Q.931 - digital
subscriber signaling H.450.1 - Generic
functional protocol for the support of
supplementary services in H.323 H323 Annexes
Annex D - Real Time fax over H.323 Annex E -
Multiplexed call signaling Annex F - Simple
Endpoint Terminal (SET) Annex G - Text SET
Annex H - Mobility Annex I - Operation over
low QoS Networks Annex J - Secure SET Annex
K - HTTP Service Control Transport Annex L -
Stimulus Signaling Annex M - QSig Tunneling
Annex N - QoS Audio codecs G.711 - PCM audio
codec 56/64 kbps G.722 - audio codec for 7 Khz
at 48/56/64 kbps G.723 - speech codec for 5.3
and 6.4 kbps G.728 - speech codec for 16 kbps
G.729 - speech codec for 8/13 kbps Video
codecs H.261 - video codec for gt 64kbps
H.263 - video codec for lt 64kbps Related
standards H.320 - The original ISDN
videoconferencing standard. H.324 - An
extension of H.320 for videoconferencing over
PSTN lines T.120 - Real time data conferencing
protocol
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Voice quality of Audio codecs?
MOS (Mean Opinion Score)
5
Excellent
G.711
PCM
G.728
G.726 G.727
ADPCM
LD-CELP
4
G.729
G.723
CS-ACELP
Good
MP-MLQ ACELP
3
Fair
2
Poor
1
Bad
2
4
8
16
32
64
kbps

TDA200/100 supported
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5.What is the connection type of VoIP ?
(1)Configuration of 1st stage (Current Models)
(2)Configuration of 2nd stage( TDA200/100 V1)
PBX
FXS/FXO/EM/PRI/BRI/T1/E1
IP Trunk
PT/SLT
Router
(3)Configuration of 3rd stage (TDA200/100 V2)
PBX
IP Telephone
PT/SLT
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6.What is KX-TDA0480(VoIP Gateway Card) ?
- KX-TDA0480(VoIP Gateway Card) to be built
into a slot of KX-TDA200/100 -
KX-TDA200/100 vendor can provide their customers
with the total solution of the telephone and
data networks using KX-TDA0480.
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6.1 What are the benefits of KX-TDA0480 ?
BRI-CO (QSIG-Slave)
BRI-EXT (QSIG-Master)
BRICard
OKI-BV1250-BRI
KX-TD500
KX-TDA0480 (VoIP Card)
QSIG-Master
BRICard
QSIG-Slave
KX-TDA100/200
No programming needed for the I/F between VoIP
card and PBX QSIG Service
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6.2 How is the connection of KX-TDA0480 ?
KX-TDA0480 (IP-GW Card)
KX-TDA0480 (IP-GW Card)
KTS/PBX
IP Network
Router
Router
LAN
LAN
Head Office
Branch Office
TDA480 is able to store number translation
information for up to 511.(without
GK) KX-TDA0480(VoIP Card) does not operate in the
communication of the network where NAT(Network
Address Translation) was used.
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6.3 How is the construction of TDA0480?(1/2)
DSP
CPU
10 Base T Ethernet Port
SD RAM
RS232C Maintenance Port
FPGA
Upper Card( VoIP/H.323 control )
Lower Card(Communicate MPR and Upper card)
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6.3 How is the construction of TDA0480?(2/2)
ROM(MAC Address)
Power
CPU
ASIC
SRAM
LAN Controller
SRAM
Dual Port RAM
Flash Memory
FPGA
CPU
ASIC
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6.4 What are KX-TDA0480 Functions?
(1)ITU-T H.323 version 2 Compliant (2)Voice
Codec G.729a / G.723.1 Voice Channel
4 (3)Internal DNS facility (4)Adaptive jitter
buffer technology (5)Automatic integrated echo
cancellation (6)Fax (G3 Standard) Fax
Channel 4 (7)DTMF Transmission (8)Easy
Maintenance(RS232C and LAN)
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(3)Internal DNS facility
- You don't need the installation of the special
external H.323 gate keeper or DNS server by
using the data file of translation of the
number in IP Trunk. - KX-TDA0480 has an internal
DNS facility that can be used to perform this
task.
A10.75.49.212 B10.75.42.242 C10.75.40.252
A10.75.49.212 B10.75.42.242 C10.75.40.252
PBX-A
PBX-B
PT/SLT
Router
A10.75.49.212 B10.75.42.242 C10.75.40.252
PBX-C
Router
Management PC
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(4)Adaptive jitter buffer technology
- Voice is reproduced, after the packet is
accumulated in the buffer once. - KX-TDA0480
supports a secondary Jitter Buffer that
activates in a dynamic manner.(Regularly and Less
delay) - This feature can be configured to help
compensate for network congestion problems.
Voice Packet
From IP Network
To PBX
IP Gateway
Regularly
Irregularly
Buffer
Maximum Receive Buffer Size, defines the size of
Jitter Buffer (max 1920ms)
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(5)Automatic integrated echo cancellation
(1)No echo cancellation
ltExamplegt
PBX
PBX
100 ms
10 ms
10 ms
Caller
PT/SLT
PT/SLT
Router
Router
100 ms
10 ms
10 ms
(2)Echo cancellation
Echo Cancellation
ltExamplegt
PBX
PBX
100 ms
10 ms
10 ms
Caller
PT/SLT
PT/SLT
Router
Router
From 150ms to 200ms is the limit of the delay.
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(6)Fax (G3 Standard)
- G3 fax conforms to ITU-T Rec. T.38 standards -
Up to four fax lines per unit - Communication
configuration is 9600, 4800bps with no fall back
PT/SLT
PBX
NO
Voice compression
FAX?
YES
FAX Codec IP(T.38) Transmission
Operational limits - Manual transmission and
voice reservation functions of the G3 fax
terminal cannot be used. - Under high network
load and poor transmission conditions, a fax
communication may be dropped. - During a fax
connection, KX-TDA0480 send a Ring Back Tone
(RBT) until a fax connection is achieved.
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(7)DTMF Transmission
- Sending units detect and convert DTMF tones for
reliable TCP transmission. - Receiving units
regenerate DTMF tones.
PT/SLT
PBX
Codec
NO
PB Signal
CS-ACELP
PB?
YES
PB Codec
Assures accurate and reliable transmission when
interfacing with Auto Attendant/Voice Mail or
Interactive Voice Response systems.
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(8) Easy Maintenance(RS232C and LAN)
Remote maintenance is available through the
network by the maintenance console set up in the
network.
Maintenance Console
Telephone Network
Telephone Network
IP Network
PBX
PBX
(1)Update of the file (2)Check the state of IP
Trunk operation (3)Change in the office data
(4)Collect the Report/Log(Traffic, Log of
trouble, and History of the telephone call,
etc.) (5)Reboot and shutdown, etc. (6)Setting
the time
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(8) Easy Maintenance(RS232C and LAN)
The command restriction can prevent the command
being executed from two or more maintenance
persons at the same time when remotely
maintaining.
PBX
LAN
RS232C
More than one log-in to the equipment is
possible. - Only 1 user of the serial - Up to 3
users of telnet
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(8) Easy Maintenance(RS232C and LAN)
You can memorize the information of fault and
fault recovery which is generated in VP Trunk,
display with the lamp in front of the VP Trunk.
Command entry example ELOG There are 003
messages 10 (Remove) 20 (Voice) 00 (DSP-Fault)
SEQ01 TUE Jul 08 122930 1997 4EF94000
15784E71 009029D0 009029D0 N._at_..xNq..)...). 00
(Fault) 20(Voice) 00 (DSP-Fault) SEQ01 TUE Jul
08 122930 1997 0008F75C 4FEF000C 300748C0
7204B081 /0...0.H.r... 01 (Report) 00(System)
00 (Power-ON) SEQ00 TUE Jul 08 122852 1997
47EEFF8C 42420C33 00202000 6D080C33 G...BB.3.
.m..3 ...ELOG Command End. Thu Jul 08 123030
1997
(1) The number of information which can be
memorized are 700 or less. It is cleared
from old information one by one, when 700 is
exceeded. (2) Fault information is memorized
when the fault occurs, and VP Trunk
informs(TRAP transmission) to the specified NMS.
(3) The alarm lamp of VP Trunk is lit according
to the content of the fault. (4) Recorded fault
log information can be output to the display by
the operation from the maintenance console.
(5) Fault information can be collected by the
following method. - Function of collection of
fault logs of maintenance console software -
Communication software of PC (Telnet etc.) -
Direct collection from RS232C port
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LED information for Status and Alarm
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(8) Easy Maintenance(RS232C and LAN)
The Fault occurrence can be notified by e-mail.
Fault message (1) Power ON
(2) Reboot by command
(3) Reboot due to fault
Factory
HQ
Host
Router
PBX
PBX
SW-HUB
SW-HUB
Router
Mail Server
Sales Offices
Internet
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7.What are Router Functions for the QOS?

• (1)RSVP(Resource reServation Protocol)
• (2)Collision prevention of voice and data
• (Separating the port of LAN)
• (3)Priority control for the Voice packet
• (4)Securing the bandwidth
• (5)Packet fragmentation
• (6)RTP header compression

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(1)RSVP(Resource reSerVation Protocol)
(1)RSVP is operated on IP router. (2)This is to
secure the bandwidth of the voice before the
communication, and to guarantee the bandwidth
of end to end. (3)The real-time data streaming
cannot be guaranteed, though RSVP can
guarantee Bandwidth. (4)It is necessary to have
RSVP function by all Router which passes to
use RSVP.
PBX
PBX
Path Message
PT/SLT
PT/SLT
Router
Router
Reserve Message
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(2) Collision prevention of voice and data
(1)Same port of LAN
IP Trunk
PT/SLT
(2)Separating the port of LAN
IP Trunk
PT/SLT
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(3)Priority control of voice
(1)Queuing
IP Trunk
Router
PT/SLT
The voice is previously prior put out.
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(4)Securing the bandwidth
(1) Current construction
PBX
PBX
PT/SLT
Analog leased line (4 lines)
PT/SLT
Digital leased line (64kbps)
Router
Router
(2) Band width of leased line
PBX
PBX
PT/SLT
PT/SLT
Digital leased line (128kbps)
Router
Router
Bandwidth by one channel 14kbps, Channel of
voice path 4 channels, Bandwidth of control
signaling 8kbpsTotal Bandwidth 14 X 4 8
64Kbps
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(5)Packet fragmentation
(1)The packet is not divided
IP Trunk
Router
PT/SLT
A delay of the voice is created.
(2)The packet is divided
IP Trunk
Router
PT/SLT
The delay of the voice decreases.
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(6)RTP header compression
In the case of G729A(8kbps), Packet Interval
40ms
Packet Interval 40ms
IP Packet/80B
RTP/12B
UDP/8B
IP/20B
Voice/40B
Voice/40B
Header/5B
IP Packet/45B
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Recommended Router
- Cisco 1000 series ISO10.0 or more - Cisco 1600
series ISO10.0 or more - Cisco 2500 series
ISO10.0 or more - Cisco 3000 series ISO10.0 or
more - Cisco 4000 series ISO10.0 or more
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Chapter 12.1
VoIP
Gateway Card
Thank you very much !
Thank you very much !