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Appendix A: Network Examples 329

P0911588 Issue 01 Enterprise Edge 2.0 Programming Operations Guide

Target lines are virtual communication paths between trunks and telephones on the

Enterprise Edge system. They are incoming lines only, and cannot be selected for

outgoing calls. With target lines, you can concentrate incoming calls on fewer

trunks. This type of concentration is an advantage of DID lines. Enterprise Edge

target lines allow you to direct each DID number to one or more telephones. Target

lines are numbered 241 to 336.

Telephones can be configured to have an appearance of any type of trunk and line

(including target lines, excluding PRI trunks). If assigned, they are used for

monitoring call usage.

For more information on Enterprise Edge external line types, refer to:

• PRI lines on page 329

• T1 lines (Loop, E&M, DID, Ground start) on page 329

• BRI lines on page 330

• DPNSS lines (International systems only) on page 330

PRI lines

Primary Rate Interface (PRI) lines give you incoming and outgoing access to an

ISDN network and are auto-answer trunks. PRI lines are set to auto-answer by

default and cannot be changed. The DTI (EE-DTM) is configured to provide PRI

lines.

PRI lines provide a fast, accurate and reliable means of sending and receiving data,

images, text and voice information. Using PRI lines allows for faster transmission

speeds and the addition of a variety of powerful business applications, including

remote LAN access, video conferencing, file transfer and Internet access.

T1 lines (Loop, E&M, DID, Ground start)

Ground start lines offer the same features as loop start trunks, but are used when the

local service provider does not support disconnect supervision for the digital loop

start trunks. Ground start trunks work with T1 only. By configuring lines as ground

start, the system will be able to recognize when a call is released at the far end.

Target lines are assigned by default for all templates except the DID

template.Target lines are assigned line numbers (for example, 241 to 336) similar

to physical lines.

Tips

You cannot change the trunk mode for a ground start trunk on an EE-DTM (or

DTI). It always has disconnect supervision.

An EE-DTM configured for T1 can provide a maximum of 24 ground start

trunks. Analog ground start trunks are not supported.

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Avaya BCM 2.0 Programming Guida Utente Pagina 329