Transcript SG2001_VIP

PLANET Technology Corp.
Product Guide 2001
VoIP Products
Your Voice over Internet
By Product Department
SG2001_VIP.ppt
Page 1
The VoIP Products
•
•
•
•
Product Range
Product Position
About the Telephony Gateway
Deeper Look at the how it works
SG2001_VIP.ppt
Page 2
Product Range
• Enterprise Solutions
• Choice for SOHO Users
SG2001_VIP.ppt
Page 3
Enterprise Solution
• VIP-000
– 2-slot Internet Telephony Gateway
– Modules
• VIP-FXO: Foreign Exchange Office
• VIP-FXS: Foreign Exchange Station
• ISDN Line Module
• VIP-SGK
– Remote Authentication System
– Handle up to 48 Internet Telephony Gateway
SG2001_VIP.ppt
Page 4
VIP-000
2-slot Internet Telephony Gateway
• 2-slot for module connectivity
– Up to 8 channel simultaneously
– Choice of modules, flexible in installation
• Management
–
–
–
–
SG2001_VIP.ppt
Telnet/ Web manageable
Local Dial phone book
Hunt Group Support
Hot line support
Page 5
SOHO Solutions
• VIP-200
– 2-port Internet Telephony Gateway
– 2-port FXS interface for direct analog devices
• VIP-400
– 4-port Internet Telephony Gateway
– 2-port FXS interface for analog devices
– 2-port FXO interface for PBX/ PSTN
SG2001_VIP.ppt
Page 6
Product Positioning
• VIP-000 is suitable for Small to
Middle sized enterprise
– 8 lines can direct connect to local PBX sharing all your
phone users
• VIP-200 is suitable for Small Home
Users or Remote Branches
– One phone set/ One Fax machine
• VIP-400 is suitable for Small
offices & branches
– Phone set and Fax machine
– PBX and PSTN
SG2001_VIP.ppt
Page 7
About the Telephony Gateway
•
•
•
•
•
Concept about VIP-xxx
Benefits
Key Features
About FXO and FXS
Applications
– Installation
– How to make calls
– How to receive calls
SG2001_VIP.ppt
Page 8
Concepts of the Gateway
• The VIP-xxx is a device that
convert/revert your analog voice
into/from digital data
• Transfer you voice data through
Internet
• Requirements
– The Internet Telephony Gateway
– Ethernet Networks and Router(s) to the Internet
– Your existing telephone system
• Standards, H.323
– The standard provides a foundation for audio, video,
and data communications across IP-based networks,
including the Internet
SG2001_VIP.ppt
Page 9
The Benefits
• Lower the PSTN cost, especially
the International call
• Plug and Call
• Cooperate with existing phone
system
• Cooperate with the TCP/IP
networks and widely used OS,
the Windows System
• Do not have to change the
behavior of having a call
SG2001_VIP.ppt
Page 10
Key Features
• Up to 8 Analog port for up to 8channel in one time
• Choice of FXO or FXS modules for
flexible installation
• 10/100Mbps UTP port for LAN
installation
• Support ITU 729A/B, G723.1 G.711 for
most popular ITG services in the
market
• H.323 protocol stack compliant for
Internet Telephony Applications like
NetMeeting, Web Phone, etc.
SG2001_VIP.ppt
Page 11
Key Features –ctd.
• GateKeeper Support for advanced
management
• HTTP engine for web-browser
management
• Flexible Dial Plan for speed dialing
• Voice Processing
–
–
–
–
SG2001_VIP.ppt
Voice Activity Detection (VAD)
Comfort Noise Generation (CNG)
Hybrid Echo Cancellation (HEC)
Voice /FAX detection (T.38 fax support)
Page 12
About the two Interface
FXO & FXS
• About the two
– FXO: Foreign eXchange Office
– FXS: Foreign eXchange Station
• FXO accepted connections
– PBX internal line
– PSTN line
• FXS accepted connections
– PBX external line
– KTS
FXS
• Like analog phone set / Fax machine
SG2001_VIP.ppt
Page 13
FXO
Application –1 (FXS to KTS)
Topic: Pure Internet Phone System for Small Office
• With FXS installed, up to 8 KTS (Key
Telephone System) come to 8 Internet Phones
Internet Phone
Service provider
FXS
VIP-200/400
SG2001_VIP.ppt
Page 14
Application –2 (FXS to PBX)
Topic: Pure Internet Phone System for Mid-Sized Office
• With FXS installed, up to 8 lines can
connect to the existing PBX external line
for pure Internet Call
Internet Phone
Service provider
FXS
SG2001_VIP.ppt
Page 15
Application –3 (FXO to PBX)
Topic: Pure Internet Phone System for Mid-Sized Office
• With FXO installed, up to 8 lines can
connect to the existing PBX internal line
for pure Internet Call
Internet Phone
Service provider
FXO
SG2001_VIP.ppt
Page 16
Application –4 (FXO to PSTN)
Topic: Pure Internet Phone System for Mid-Sized Office
• With FXO installed, up to 8 PSTN lines can
connect to the Telephony Gateway for pure
Internet Call
Internet Phone
Service provider
FXO
SG2001_VIP.ppt
Page 17
How it works to call out - 1
Example to have a Dial base on Application 1
HQ
FXS
Branch 1
SG2001_VIP.ppt
Page 18
– Store the IP Address of
Branch 1 to VIP-000, say
Region 1 with number “1”
– Setup the Phone number
of each phone number in
this branch, say from 1 to 8.
– Pick up any phone in
Headquarter and press “11”
– The VIP-000 will find and
contact with the ITG in
branch and check the
number “1”
– Phone 1 in branch then
“Rings”
How it works to call out - 2
Example to have a Dial base on Application 3
HQ
FXO
Branch 1
SG2001_VIP.ppt
Page 19
– Store the IP Address of
Branch 1 to VIP-000, say
Region 1 with number “1”
– Setup the Phone number
of each phone number in
this branch, say from 1 to 8.
– Pick up any phone in
Headquarter and press,
extension number for ITG,
then press “11”
– The VIP-000 will find and
contact with the ITG in
branch and check the
number “1”
– Phone 1 in branch then
“Rings”
How it works to accept a call - 1
Example to receive a call base on Application 2
– Store HQ’s IP to Branch’s
IGT say Region 1
– Prefix the Region 1 with
number “0” , I.e. record
phone 1 to 8 in HQ with
“01”, “02”...
– In HQ, setup a port 1
accept “1”, 2 for “2”, etc.
– Pick up the phone in
branch and dial number
“0106” or “0206”
– Extension 106/206 in HQ
then rings to indicate a call.
HQ
FXS
Branch 1
SG2001_VIP.ppt
Page 20
How it works to accept a call - 2
Example to have a Dial base on Application 4
HQ
FXO
Branch 1
SG2001_VIP.ppt
Page 21
– Store HQ’s IP to Branch’s
IGT say Region 1
– Prefix the Region 1 with
number “0” , I.e. record
phone 1 to 8 in HQ with
“01”, “02”...
– In HQ, setup a port 1
accept “1”, 2 for “2”, etc.
– Or setup the phone
number according to the
area. For example, port 1,
set as area code 1, and/or
the accepted number 18574195
– Pick up the phone in
branch and dial number
“018574195”
– ITG will call out use
number 8574195
How it works to accept a call - 3
Example to have a Dial from H.323 Application
HQ
FXO
SG2001_VIP.ppt
Page 22
– Store the number in HQ’s
ITG.
– In a H.323 application like
Microsoft NetMeeting, set
up the H.323 gateway to
the IP of the ITG in HQ.
– Have a call through the
gateway base on the
phone number stored in
the ITG
– The recipient's phone
should rings after the PC
connect to the ITG through
Internet.
Have a deeper look
Some Information for understanding the Gateway
• Voice Construction and
transmission
• Voice quality Issue
–
–
–
–
–
Voice Codec
Delay
Jitter
Echo
Packet loss
• Some advanced setting for VIPxxx
SG2001_VIP.ppt
Page 23
Voice construction / Transmission
• Analog Voice to PCM
– Analog voice record from the MIC of the phone set
– The analog converted PCM digital stream
• PCM Processing
– Echo remove
– VAD remove silence
– Forward to CODEC
• PCM Transfer to Frames
– PCM stream fed into CODEC and frames created
– Also compress PCM stream follow algorithm
• G.729a/b: 8Kbit per second, G.723: 5.3/6.3Kbps
• Frames to Packets
• Packet addressing and forwarding
SG2001_VIP.ppt
Page 24
Voice Quality Issue
Voice Codec
4.5
4.0
Mean Opinion Score
G.723.1
(6.3 kbps)
G.729A
6.3
8
G.711
G.723.1
(5.3 kbps)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
kps
Codec
G.723.1*
G.729A
G.711
SG2001_VIP.ppt
Page 25
MIPS
17
12
2
5.3
64
Frame time
30 ms
10 ms
125 us
* IEEE Comm. 9/97
Voice Quality Issue
Delay
Voice
Accumulation
Voice &
Protocol Processing
Transmission
Queueing
Protocol Processing
5 ms
Jitter Remove
Propagation
Voice Processing
90 ms
One-Way
Gateway
Gateway
IP Network
SG2001_VIP.ppt
Page 26
PSTN
Voice Quality Issue
Jitter
ITG implements adaptable play-out buffer:
• Dynamic buffer size
• Large jitter buffer for fax
4
3
2
1
4
IP
Network
Variations in packet inter-arrival rate
• Changes in IP network load
• Variation in routing paths
• Variable queuing delays
SG2001_VIP.ppt
Page 27
2 3
1
4
3
2
1
Voice Quality Issue
ECHO Cancelation
Echo
•
•
In telephony systems line echo heard by the speaker is caused by the reflections from
hybrids which convert 4 wire circuits to 2 wire circuits.
PSTN requires echo cancellation when round trip delay exceeds 50 ms.
Hello
Hello
Central Office Switch
2 wire
local loop
4 wire
trunks
PBX
4 wire
trunks
SG2001_VIP.ppt
Page 28
Voice Quality Issue
Packet Loss
IP Network
6
5
4
3
2
1
6
4
3
1
6
4
4
3
5
2
1
1
ITG compensate the lost packet by replaying once or twice
the last frame received during the interval when the
lost packet was supposed to be played out.
SG2001_VIP.ppt
Page 29
Some Advanced Setting of VIP-xxx
• PLAR
(Private Line Auto-Ring down)
– Set tcid n dial_in plar Destination
• Ring Frequency
– Tel set ring_freq n
– Tel show ring_freq
• Coding
– Show coding n
– Set coding n parameters
• Future Product enhancement
– Impendance adjustable
– Dynamic DNS
SG2001_VIP.ppt
Page 30
Thank you!
SG2001_VIP.ppt
Page 31