Aug 06

How to create your own VOIP network/business #70

From: http://sitestree.com/?p=5035
Categories:70
Tags:
Post Data:2008-10-17 05:35:35

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Aug 06

Office Phone Systems #70

  • PSTN carries Voice
  • Internet Carries Data – data network
  • Recently, PSTNs are customized to carry data
  • You can also carry voice over the data network like the Internet – called IP Telephony or VOIP.

How to connect to the Voice Network – PSTN
Just connect to the phone line – applies to one user only

How multiple users can connect to the Voice Network – PSTN

  • Key System-Most basic multiuser support – good for very small offices
  • PBX
  • centrax

Key System

  • Uses a few trunk lines to connect to the LE or CO-central Office
  • When users call, one of the free lines is used
  • Each trunk line is associated with a number
  • Incoming calls come to a central phone that can be forwarded to others
  • Individual users can also pick the phone
  • Good only when < 50 users are involved
  • Recent Key Systems come with features like: Caller ID, Voice Mail, Conference Calls
  • Not much scalable
  • Push button to select a line

PBX

  • Works like a telephone exchange
  • Has more outgoing trunk lines
  • Users can call outside or inside independently
  • Users can press 9 or a special key to make calls to outside
  • Internal calls never leaves the internal network, hence, PBX provides security
  • More scalable than the Keysystem
  • Can associate a number with a particular phone
  • Have features like analog extensions, digital extensions

Centrex System

  • Similar to the PBX but the telephone company handles the Centrex equipments
  • The Centrex equipments do not have to be in the same building like PBX, hence Centrex is more popular withing big enterprises
  • Less setup cost, more running cost
  • Each phone set has a public phone number associated
  • Scalable
  • Can connect multiple sites without PSTN. Hence, providing IP telephony through Centrex system is easier and practical
  • Installation cheaper

From: http://sitestree.com/?p=5027
Categories:70
Tags:
Post Data:2012-03-04 19:04:09

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Aug 05

#Sensor: #Canada: #Job/Contract/Project: #Sensor, #Tracking, #Fusion, #Estimation, #Surveillance, #sensor network, #target #tracking, #security 2021-08-06

Date Posted:2021-08-06 .Apply yourself, or submit others as candidates; Build a recruitment team to submit others as candidates; submit RFP to be considered for projects in future; Try to become a vendor so that you are asked to submit consultants/resources in future. If these work for you. This list is posted in this blog everyday provided there are new projects under the criteria

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    Aug 05

    #Engineering: #Canada: #Job/Contract/Project: Any #Engineering: #Computer, #Electrical, #Electronics, #Civil, #Chemical, #Mechanical, #Naval, #Biomedical, and misc Engineering

    Date Posted:2021-08-06 .Apply yourself, or submit others as candidates; Build a recruitment team to submit others as candidates; submit RFP to be considered for projects in future; Try to become a vendor so that you are asked to submit consultants/resources in future. If these work for you. This list is posted in this blog everyday provided there are new projects under the criteria

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    2. Fuel Tank Corrosion Protection and Mechanical Repairs, CFB Halifax, NS
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  • Supply And Installation Of Heating, Ventilation And Air Conditioning (Hvac) System Replacement, Electrical Upgrades
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  • Request for Proposal for Engineering Services – Kinex Arena Lifecycle Assessment
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  • Electrical Upgrade

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    Aug 05

    #Canada: #IT Jobs:#Consultants, #Contractors, #Analysts, #Engineers, #Developers, #Technology Consultants, #IT-Consultants Opportunities2021-08-06

    Apply yourself, or submit others as a candidate, Build a recruitment team to submit others as a candidate, submit RFP to be considered for projects in future, Try to become a vendor so that you are asked to submit consultants/resources in future

    1. construction-services-10004
    2. URBAN DESIGN & PLANNING CONSULTANT for 2022 CAMPUS MASTER PLAN UPDATE
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  • Silvera At Glamorgan: Westview Residences East – Prime Consultant RFP
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    • Aug 05

    How to write device drivers in c in Linux #72

    From: http://sitestree.com/?p=5164
    Categories:72
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    Post Data:2011-01-30 06:52:02

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    Aug 05

    Software Development and Software Engineering for Agriculture Industries #72

    From: http://sitestree.com/?p=5032
    Categories:72
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    Post Data:2010-09-08 11:18:08

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    Aug 05

    DHCP: How to configure a DHCP server in Linux #74

    From: http://sitestree.com/?p=5039
    Categories:74
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    Post Data:2011-01-12 23:11:49

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    Aug 05

    DNS: How to configure a DNS server in Linux #74

    From: http://sitestree.com/?p=5038
    Categories:74
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    Post Data:2010-04-29 10:25:02

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    Aug 05

    Matlab Overview: What is Matlab #75

    Matlab is used for: Math and computation, Algorithm development, Data acquisition, Modeling, simulation, and prototyping, Data analysis, exploration, and visualization, Scientific and engineering graphics, Application development, including graphical user interface building.

    For details please check here

    From: http://sitestree.com/?p=5055
    Categories:75
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    Post Data:2012-07-10 02:13:02

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