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TANDBERG MCU and IP
____________________________________

TANDBERG

D50183, Rev 1.1
TANDBERG
TANDBERG MCU and IP Rev 1.1


2
Table of Contents
1.

INTRODUCTION ..........................................................................................................................4

2.

WHAT IS H.323?............................................................................................................................4

2.1

C
OMPONENTS
...............................................................................................................................4

2.1.1

Terminals ................................................................................................................................4

2.1.2

Gatekeepers.............................................................................................................................5

2.1.3

Gateways.................................................................................................................................5

2.1.4

Multipoint Control Units.........................................................................................................6

2.2

S
TANDARDS
..................................................................................................................................7

2.2.1

The Audio Standards:..............................................................................................................8

2.2.2

The Video Standards:..............................................................................................................8

2.2.3

The Communications Standards: ............................................................................................8

2.2.4

The Encryption Standards: .....................................................................................................8

3.

TANDBERGS IP MCU IMPLEMENTATION..........................................................................9

3.1

C
OMMON
I
MPLEMENTATION
F
EATURES
........................................................................................9

3.1.1

Remote Management...............................................................................................................9

3.2

D2

S
OFTWARE
............................................................................................................................10

3.2.1

Main Features .......................................................................................................................10

3.2.2

Layer 4 Ports Used................................................................................................................10

3.2.3

Example of and IP call (IP direct dialing)............................................................................11

3.2.4

Audio .....................................................................................................................................12

3.2.5

Video .....................................................................................................................................12

3.2.6

Jitter And Latency .................................................................................................................12

4.

TANDBERG MCU H.323 FEATURES......................................................................................13

4.1

S
PECIAL
F
EATURES
.....................................................................................................................13

4.1.1

H.323 MCU...........................................................................................................................13

4.1.2

Intelligent Packet Loss Recovery (IPLR
TF
) ...........................................................................13

4.1.3

Best Impression
TF
..................................................................................................................14

4.1.4

Secure Conference
TF
.............................................................................................................15

4.2

P
RESENTATIONS
..........................................................................................................................15

4.2.1

H.323 Duo Video
TF
................................................................................................................15

4.3

Q
UALITY OF
S
ERVICE
.................................................................................................................16

4.3.1

RSVP .....................................................................................................................................16

4.3.2

Differential Services..............................................................................................................17

4.3.3

IP Precedence and Type of Service.......................................................................................17

4.4

R
EMOTE
M
ANAGEMENT
..............................................................................................................18

4.4.1

Simple Network Management Protocol (SNMP)...................................................................18

4.4.2

HTTP/HTTPS Server.............................................................................................................18

4.4.3

FTP Server ............................................................................................................................19

4.4.4

Telnet Server .........................................................................................................................19

4.5

V
IDEO
.........................................................................................................................................19

4.5.1

H.263+ Custom Video Formats (Digital Clarity
TF
)..............................................................19

4.5.2

4CIF Digital Clarity
TF
...........................................................................................................20

4.6

O
THER
........................................................................................................................................20

4.6.1

TCS-4 ....................................................................................................................................20

4.6.2

Asymmetrical Encoders and Decoders .................................................................................20

4.6.3

Inband Changing of Video and Audio Algorithms................................................................21

4.6.4

Flow Control (Downspeeding
TF
)...........................................................................................21

4.6.5

Dynamic Bandwidth Management ........................................................................................21

4.6.6

Lip Sync.................................................................................................................................21
TANDBERG
TANDBERG MCU and IP Rev 1.1


3
5.

USING H.323 WITH TANDBERG.............................................................................................23

5.1

O
NLY
C
ALLING
E
NDPOINT
H
AS
G
ATEKEEPER
............................................................................24

5.2

O
NLY
C
ALLED
E
NDPOINT
H
AS
G
ATEKEEPER
..............................................................................25

5.3

B
OTH
E
NDPOINTS
R
EGISTERED
T
O
D
IFFERENT
G
ATEKEEPERS
...................................................27

6.

LIST OF TERMS .........................................................................................................................29

7.

APPENDIX A................................................................................................................................31

7.1

P
OLYCOM
H.323

E
NDPOINTS
L
AYER
4
PORTS
.............................................................................31

7.2

P
ICTURE
T
EL
H.323

E
NDPOINTS
L
AYER
4
PORTS
.........................................................................32

TANDBERG
TANDBERG MCU and IP Rev 1.1


4
1. Introduction
H.323 is an International Telecommunications Union (ITU) standard that describes the
protocols, services and equipment necessary for multimedia communications including
audio, video and data on networks without guaranteed Quality of Service (QoS). These
networks technologies may include Ethernet, Fast Ethernet, and Token Ring and protocols
like Internet Protocol (IP) or Integrated Packet Exchange (IPX). Due to the need to
communicate between smaller networks connected to the Internet, IP will be a more
popular transport for H.323.

Today, the dominant method of Internet communications is email. However, there is a
growing need to increase communications to include audio, video and data. The
explosion of the Internet in the early 199