38
Chapter 3 CS 1000 considerations
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A single destination code and route (or a group of destination codes and routes) can be configured
on the SRG50 to route all calls not terminated locally by the SRG50. These calls are routed over
the VoIP trunks. If the VoIP trunks become unavailable, the calls are routed to the proper location
using PSTN fallback. This is similar to the VNR feature in Succession Branch Office.
Seamless dialing requires that the start digit of the DNs are unique for each system (coordinated
dialing plan). If the start digit is the same on both systems, the local users on the SRG50 must dial
a separate destination code before the main office DN.
Refer to
“Setting up the private VoIP network” on page 75
for details on dialing plan and routing
configuration.
Bandwidth Management
Three levels of bandwidth management are supported by the CS 1000:
•
“Network Bandwidth Management (NBWM)”
•
“Adaptive Network Bandwidth Management (ADBWM)”
•
“Alternative Call Routing (ACR)”
Network Bandwidth Management (NBWM)
The SRG50 interoperates with the Network Bandwidth Management (NBWM) feature in a
manner similar to MG 1000B, though only G.711 and G.729 codecs are supported. At the SRG50,
a Virtual Private Network ID (VPNI) and Zone ID are entered with values defined by the main
office configuration (refer to
“Configuring the SRG50 for Bandwidth Management: NBWM,
ADBWM, and ACR” on page 39
). The VPNI and Zone ID allow the CS 1000 to recognize that
H.323 calls to and from the SRG50 are from a specific Bandwidth Management zone.
NBWM allows bandwidth zones to be configured on a network basis so that codec selection and
bandwidth allocation software can identify whether IP telephones or gateways are physically
collocated (in the same bandwidth zone) even though they are controlled by different call servers.
NBWM is used to define the codec selection policy and track bandwidth used for calls that
traverse the WAN (interzone calls) and the LAN (intrazone calls). The bulk of configuration for
NBWM is done at the main office.
Adaptive Network Bandwidth Management (ADBWM)
As with NBWM, only the VPNI and Zone ID are required at the SRG50 in order to implement he
Adaptive Network Bandwidth Management (ADBWM) feature on the SRG50 (refer to
“Configuring the SRG50 for Bandwidth Management: NBWM, ADBWM, and ACR” on page
39
).
ADBWM uses real-time interaction to enhance the performance of Voice over Internet Protocol
(VoIP) networks. ADBWM adjusts bandwidth limits and takes corrective action in response to
Quality of Service (QoS) feedback. This adjustment occurs dynamically, while calls are in
progress. A call server with ADBWM uses VPNIs and Zone IDs to keep track of the bandwidth
Summary of Contents for SRG50
Page 1: ...Part No N0060720 03 December 2007 Survivable Remote Gateway 50 Configuration Guide...
Page 4: ...4 Task List N0060720 N0060720 Glossary 107 Index 109...
Page 8: ...8 Contents N0060720...
Page 26: ...26 Chapter 1 Getting started N0060720 N0060720...
Page 50: ...50 Chapter 3 CS 1000 considerations N0060720 N0060720 Figure 6 S1000 IP Terminal Details panel...
Page 62: ...62 Chapter 4 CS 2000 considerations N0060720 N0060720...
Page 100: ...100 Chapter 8 Troubleshooting N0060720...
Page 106: ...106 Telephone features in normal and local mode N0060720...