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P0911590 Issue 02 Enterprise Edge 2.0 IP Telephony Configuration Guide
Glossary
Backbone A network’s major transmission path, handling high-volume, high-
density traffic.
Bandwidth A measure of information carrying capacity available for a transmission
medium, shown in bits per second. The greater the bandwidth, the more
information sent in a given amount of time.
Bridge LAN equipment providing interconnection between two networks using
the same addressing structure. A bridge filters out packets that remain
on one LAN and forwards packets for other LANs.
CBQ Class Based Queuing
CD-ROM Compact Disk - Read Only Memory
CDP Coordinated Dialing Plan
CO Central Office
Codec Equipment or circuits that digitally code and decode voice signals
Communications
Protocol
A set of agreed-upon communications formats and procedures between
devices on a data communication network.
CPU Central Processing Unit
Data Communications Processes and equipment used to transport signals from a data
processing device at one location to a data processing device at another
location.
DID Direct Inward Dialing
DN Directory Number
DOD Direct Outward Dialing
DSP Digital Signal Processor
E&M E&M is a type of analog trunk that detects line disconnect.
Enbloc All dialed digits sent in a single expression.
Full-duplex
transmission
Simultaneous two-way separate transmission in both directions.
G.711 A codec that delivers “toll quality” audio at 64 kbit/s. This codec is best
for speech because it has small delay, and is very resillient to channel
errors.
G.729 A codec that provides near toll quality at a low delay. Uses compression
to 8 kbit/s (8:1 compression rate). The G.729 codec allows the
Enterprise Edge IP Telephony to support only four VoIP ports.
G.723.1 A codec that provides the greatest compression, 5.3 kbit/s or 6.3 kbit/s.
Normally indicated for multimedia applications such as H.323
videoconferencing. Allows connectivity to Microsoft-based equipment.
GUI Graphical User Interface
H.323 The ITU standard for multimedia communications over an IP network.
Enterprise Edge IP Telephony supports H.323.
Hub Center of a star topology network or cabling system.
IP Internet Protocol
ITG IP Telephony Gateway
- Enterprise Edge 2.0 1
- IP Telephony 1
- Configuration Guide 1
- Contents 3
- 4 Contents 4
- Contents 5 5
- 6 Contents 6
- Overview 7
- About this document 8
- System Functions 8
- Dialing plan support 9
- Network Quality of Service 10
- Overview 11 11
- Network Performance Utilities 12
- Silence compression 13
- Echo cancellation 13
- Fax calls 14
- Alarm Notification 14
- Jitter buffer 14
- Engineering guidelines 15
- 16 Engineering guidelines 16
- Engineering guidelines 17 17
- Multiple network interfaces 18
- Method 1 19
- Method 2 19
- LAN engineering 20
- WAN engineering 22
- Link utilization 23
- 24 Engineering guidelines 24
- Setting QoS 26
- Measuring Intranet QoS 27
- Recording routes 28
- Adjusting ping measurements 29
- Measurement procedure 29
- Further network analysis 31
- Reduce link delay 32
- Reducing hop count 32
- Engineering guidelines 33 33
- Routing issues 34
- Traffic mix 35
- TCP traffic behavior 35
- Implementing the network 36
- IP telephony settings 37
- Engineering guidelines 39 39
- Figure 5 Silence compression 39
- Fallback threshold 42
- Dialing plan 43
- 44 Engineering guidelines 44
- Engineering guidelines 47 47
- 48 Engineering guidelines 48
- Figure 8 Toll bypass 48
- Setting 49
- 52 Engineering guidelines 52
- Intranet QoS monitoring 53
- User feedback 54
- Engineering checklist 55
- 56 Engineering checklist 56
- Installation 57
- Configuring a remote gateway 58
- Installation 59 59
- 60 Installation 60
- Configuration 61
- User Interface Overview 62
- Local Gateway Configuration 63
- Remote Gateway Configuration 65
- Configuration 67 67
- 68 Configuration 68
- Maintenance 69
- 70 Maintenance 70
- Interoperability 71
- No feedback busy station 72
- Glossary 73
- 76 Index 76
- Voice Jitter Buffer 76
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