Mitel MIVOICE OFFICE 250, Руководство по установке и администрированию

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MiVoice Office 250 Installation and Administration Guide
392
Planning the Network
The most important step in setting up a network is planning. Without careful planning, the network
will be difficult to program and maintain. If necessary, see Network IP Topology for information on
network topology, including firewalls and NAT.
Gather Information
As you read through this section, fill out the planning sheet on page 413 as you answer these
questions:
• How many systems (nodes) are in the network? How will they be numbered?
• Where are they located?
• What additional hardware will you need?
•
(For PRI connections)
What additional services need to be ordered? Does the local telephone
company offer point-to-point clear channel connections to the areas for the desired nodes? Does
the customer have existing cable/fiber/microwave, etc., connections that can be used? In many
cases, the network connection can simply be a customer-provided cable. The maximum length
of the customer-provided network cable should not exceed 6000 ft (1800 m). If more than 6000
ft (1800 m) of cable is required, some type of amplification, such as a repeater, is required.
• Does the customer already have a data network? It is very possible the customer already has
an existing data network. Is it possible to use bandwidth from the existing data network for voice?
Does the customer want to combine voice and data on the network? What type of drop and
insert devices will be included in the network plan?
• How will the network be configured? How will the trunks connect to the network? Will all the
trunks connect to one node or will the trunks be distributed?
• Call patterns for each node should be determined to configure the appropriate amount of chan -
nels necessary for the network connections. Remember to include incoming/outgoing intercom,
incoming/outgoing central office, automated attendant, operator, voice mail, hunt group an -
nouncement and overflow messages, and Record-A-Call traffic in your calculations.
• What is the numbering plan for the extensions, Voice Processing applications, feature codes,
hunt groups, node trunk groups, etc.? Remember to leave room for expansion in your numbering
plan.
• Does each node have a local trunk group for emergency calls?
• Which system in the network will have the external voice processing system?
• How will calls ring in to the external voice processing system? EM or NuPoint UM? Will they be
routed to other nodes?
• Will call routing tables and/or ARS route calls to other nodes?
• Which phone(s) will be the network-wide primary attendant(s)? Which phones are the node
attendants?
NOTE
For PRI connections, the System requires T1 channel 24 in any network span.