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94 Chapter 5 Configuring local VoIP trunks

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*Gatekeeper IP <ip address> If GateKeeperRouted, GateKeeperResolved or

GateKeeperRoutedNoRAS are selected under Call

Signaling, type the IP address of the machine that is

running the gatekeeper.

Backup

gatekeeper(s)

<IP address>,

NetCentrex gatekeeper does not support RAS,

therefore, any backup gatekeepers must be entered in

this field.

Note: Gatekeepers that use RAS can provide a list of

backup gatekeepers for the end point to use in the

event of the primary gatekeeper failure.

*Alias Names If GateKeeperRouted, GateKeeperResolved, or GatekeeperRoutedNoRAS are

selected under Call Signaling, type one or more alias names for the gateway.

One or more alias names may be configured for a Business Communications

Manager.

Alias names are comma delimited, and may be one of the following types:

• E.164 — numeric identifier containing a digit in the range 0-9. Identified by the

keyword TEL: Example: the Business Communications Manager is assigned

an E.164 and an H323 Identifier: Alias Names: TEL:76,

NAME:bcm10.nortel.com

• NPI-TON — also referred to as a PartyNumber alias. Similar to E164 except

that the keyword indicates the NPI (numbering plan identification), as well as

the TON (type of number). Identified by one of the following keywords: PUB

(Public Unknown Number); PRI (Private Unknown Number); UDP (Private Level

1 Regional Number (UDP)); CDP (Private Local Number (CDP)). Refer to

“Notes about NPI-TON aliases for H.323 trunks” on page 96.

• H323Identifier — alphanumeric strings representing names, e-mail addresses,

etc. Identified by the keyword NAME:

Example: The Business Communications Manager is assigned a public dialed number

prefix of 76, a private CDP number of 45, and an H323 Identifier alias:

Alias

Names: PUB:76, CDP:45, NAME:bcm10.nortel.com

• H.225 (Q.931) CallingPartyNumber (NetCentrex gatekeeper) — The

NetCentrex gatekeeper uses the H.225(Q.931) CallingPartyNumber to resolve

the call originator for billing purposes. This number must then contain a unique

prefix, or location code that is unique across all endpoints that are using the

NetCentrex gatekeeper. Identified by the keyword src:. Example for private

networks: CDP alias = src:<DN>; UDP alias = src:<LOC><DN>. Example for

public network: src:<public OLI>

Note: E164 or NPI-TON alias types are commonly used since they fit into dialing

plans. A Business Communications Manager alias list should not mix these types.

Also, the type of alias used should be consistent with the dialing plan

configuration. Use the same alias naming method on all Business

Communications Managers within a network.

**Registration TTL Default: 60 seconds This TimeToLive parameter specifies the intervals

when the VoIP gateway sends KeepAlive signals to

the gatekeeper. The gatekeeper can override this

timer and send its own TimeToLive period.

Table 23 Local Gateway IP interface fields (Continued)

Field Value Description

1 2 ... 89 90 91 92 93 94 95 96 97 98 99 ... 221 222

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