beautypg.com

Network topology, Neighbor gatekeepers – Polycom ViewStation EX4000 User Manual

Page 69

background image

Chapter 3 - Before You Deploy

© Polycom, Inc.

59

If your organization has special rate plans, those should be
incorporated into the least-cost routing tables.

Network Topology

You will need the network topology information described in

LAN/WAN Considerations on page 52

when you design your dial

plan and configure PathNavigator to manage your video network.

If the network is physically changed, you will need to update
PathNavigator’s network information so that it can manage the
video network effectively.

PathNavigator provides the means for you to assign ISDN numbers
to endpoints. The way numbers are assigned depends on your
network:

E.164 provisioning

— Choose E.164 provisioning if you are

using private numbers.

ISDN alias assignment

— If you assign ISDN numbers to

endpoints, then the ISDN ranges need to be provided to the
gatekeeper. These numbers must be coordinated with your local
ISDN provider as these numbers cannot be self-populated.
Assigning numbers that are not in your domain will result in
failed calls when users outside the organization try to access
users within the organization with self-populated numbers.

Automatically assigned numbers —

PathNavigator can

automatically assign direct inward dial (DID) numbers or
gateway extensions. You cannot automatically assign both
types of numbers on the same network.

Neighbor gatekeepers

Neighbor gatekeepers allow for the distribution of the workload
across logical boundaries within the organization. This enables
more efficient use of the network by limiting communication across
WAN links. When a call originates in one gatekeeper’s zone and that
gatekeeper is unable to resolve the dialed address, it will be
forwarded to the neighbor gatekeepers for resolution.