![3Com SuperStack 3 NBX Скачать руководство пользователя страница 40](http://html1.mh-extra.com/html/3com/superstack-3-nbx/superstack-3-nbx_administrators-manual_3109332040.webp)
40
C
HAPTER
2: D
IAL
P
LAN
Example:
Users at site A dial 911 and the system uses the Internal table
(table ID 1) to make the emergency call on one external telephone line.
Users at site B dial 911 and the system uses table ID 4 to make the
emergency call on a different external telephone line. The emergency
staff know, based on the dialing number, which site has the emergency.
Enhanced 911, E911, is available in some areas. This service enables
emergency staff to identify the specific location of the emergency. For
example, in a campus of buildings, the emergency staff can identify the
specific building, floor, and location from which the emergency call
originated. The NBX system supports E911 over ISDN. The administrator
must define an outbound call pretranslator to provide the specific
extension number from which the 911 call originated.
Dial Plan
Pretranslators
The system uses pretranslators to modify digit sequences of incoming or
outgoing calls. On incoming calls, pretranslators can map the entire
dialed number (including area code) to an internal extension number.
For example, an external party dials 978-555-0101 to reach the person
on extension 101. Pretranslators ensure that the proper digits are
mapped to the correct extension number.
For more information, see:
■
Pretranslators for Incoming Calls
■
Pretranslators for Certain Outgoing Calls
A typical pretranslator function involves mapping incoming DDI/DID
telephone calls to internal extension numbers.
Example:
Say that the DDI/DID telephone numbers range from
508-555-4200 through 508-555-4299. The telephone company sends
you the last 4 digits of the total telephone number. Internally, you want
to use extensions 2000 through 2099. You can define a pretranslator to:
■
Remove (stripLead) the first two digits of the incoming 4-digit
sequence.
■
Add (prepend) the digits 20 in front of the remaining 2 digits.
See “Managing Dial Plan Pretranslators” later in this chapter for detailed
information and examples on creating and managing dial plan
pretranslators.
Содержание SuperStack 3 NBX
Страница 14: ......
Страница 18: ...18 ABOUT THIS GUIDE...
Страница 26: ...26 CHAPTER 1 INTRODUCTION...
Страница 138: ...138 CHAPTER 2 DIAL PLAN...
Страница 322: ...322 CHAPTER 3 DEVICE CONFIGURATION...
Страница 328: ...328 CHAPTER 4 USER CONFIGURATION...
Страница 412: ...412 CHAPTER 10 TROUBLESHOOTING...
Страница 458: ...458 APPENDIX B ISDN COMPLETION CAUSE CODES...
Страница 480: ...480 GLOSSARY...
Страница 491: ...INDEX 491 W wall mounting telephones 142 X Xfer Vmail button 176 194 201 Y yellow alarm T1 and E1 Digital Line Cards 405...
Страница 492: ...492 INDEX...