Overview About PABX , FXS , FXO , VOIP
PABX or Private Automatic Branch eXchange is a telephone communication connection device located on the customer side .
parameter
PABX can be referred to as an internal control ( ext to ext ) and external ( outgoing and incoming) , in other words, this device that will regulate incoming and outgoing calls , so call lebh easy to contact the call that will be addressed .
Type and Type
DIGITAL PABX
DIGITAL PABX PABX is having a extention output or digital data . PABX for this type of digital data needs to be converted to the specific phone to be able to vote. each brand has a different digital conversion with different names and terms as well . Brand examples Panasonic key telephone call , Digital phone . NEC called multi- line terminal .
PABX ANALOG
ANALOG PABX PABX is having an analog output or extentionnya form of analog signals , because using the analog signal does not need special telephone . The telephone is the same as that used in the home are connected PSTN Telephone Line terms called Singgle ( SLT ) .
Hybrid PABX
PABX PABX Hybrid is a combination of the two systems above . Therefore this system has 4 cable ( 2pair - 1 pair 1 pair analog digital ) on each output .
After PABX we will certainly get to know IP PBX
What is IP PBX is a PBX that uses only the Ip protocol for interconneksi plane to plane , in general, use the IP PABX RJ45 for connection .
PABX interconnection
Understanding PABX interconnection , a combined 2 or more PABX into one unified system .
Its function is to cost savings , for example if a company has a head office and branches , which may branch - the branch located far outside the city even though overseas .
With at satukannya PABX system , then to contact the branch by telephone toll charges do not require , quite internal communication only.
Interconnection between two or more existing PABX bebarapa Method :
1 . Network interconnection network through which the call with an IP connection
2 . Interconnection via the Tandem system .
In a PBX in itself contains port FXS and FXO
What 's FXS and FXO
FXS (Foreign eXchange Subscriber ) interface port to send POTS service from a local company center ( Central Office [ CO ] ) and must be connected to the subscriber equipment ( Subscriber ) such as phones , modems , and fax machines . you can see below , the explanation on the picture FXSseperti Foreign eXchange System .
FXO (Foreign eXchange Office ) interface port to receive POTS service , generally from the Central Office ( CO ) of the Public Switched Telephone Network ( PSTN ) . In other words an FXO interface points to the Telco office ( PSTN Provider ) .
How FXS and FXO continuous with each other PBX / VOIP
FXS and FXO little scenario becomes more interesting when we introduce additional network elements such as Private Branch Exchange ( PBX ) or Voice -over - IP gateway or router . For example , you can connect the FXO interface on a phone to port FXSyang provided by a PBX , multiplexer , or Voice -over - IP gateway or router .
With PBX connection
A PBX provides FXS and FXO interfaces .
FXS = PBX - > Analog Phones
From Analog Telephone Cables - > Port FXS PBX
= FXO PBX - > Telco ( Central Office )
Telco cable from the FXS Line ( Central Office ) - > Port FXO PBX
To clear his image can be seen from the pic above .
VOIP
advantages of VoIP
Lower costs for long-distance . The main emphasis of VoIP is cost . With two locations are connected to the internet then the conversation becomes very low cost .
Infrastructure utilizing the existing data network for voice . Useful if the company has an existing network . If possible the existing network can easily be built VoIP network . No additional monthly fees required for the addition of voice communications .
Use of bandwidth that is smaller than a regular phone . With the rapid advancement of technology for voice bandwidth usage is now a very small . Data compression technique enables voice only need about 8kbps bandwidth .
Allows merged with the local telephone network that already exists. With the VoIP gateway can be connected to form a network with existing PABX office . Communication between offices can use the regular telephone
Various forms of VoIP networks can be combined into large networks . Example in Indonesia is VoIP.
Variations in the use of existing equipment , eg from a PC to a regular phone connection , IP phone handsets
The downside of VoIP
The sound quality is not as clear as the PSTN network . The effect of compression sound with a small bandwidth there will be decrease in sound quality compared to conventional PSTN network . However, if the Internet connection used is a broadband internet connection / internet over the phone , it will be crystal clear voice quality - even more clearly from the phone line and not falter .
There is a gap in communication . The process of changing data into sound , networking breaks , make a pause in communication using VoIP . Unless a Broadband connection (see point above ) .
If you have not connected to the internet 24 hours a pledge need to be interconnected.
If using the internet and computers behind NAT ( Network Address Translation ) , then the special configuration is required to make the running VoIP
There is never any guarantee if the quality of VoIP through the internet .
Equipment is relatively expensive . VoIP equipment that connects to the VoIP PBX ( IP telephony gateway ) is relatively high-priced . Expected with the popularity of VoIP is the price of the equipment is also starting down the price .
Potentially causing tissue obstructed / Stuck . If the use of VoIP is increasing, there is the potential of existing data networks to full if not well managed . Arrangements necessary for the network bandwidth is not being saturated in the company resulting from the use of VoIP .
Incorporation of well- coordinated network without going to cause chaos in the numbering system
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