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Hi,
Basically , there are many types of Toll Free Numbers
Domestic TF DTFN
International TF ITFN
Universal TF UIFN
When DTFN or ITFN number is dialled , it is routed to the IN via Tandem switches to be translated into what we cal a Down Stream Number , this number can be a normal PSTN number...
Hi guys
I have got the microwave link design toll called: Pathloss 4.0 , the problem is after installing all modules are dimmed , if any one has seen this problem please help.
Also , i got the tool called : ATDI HertzMapper , if any one has documentation for it please help
microwave link design
Hi guys
I have got the microwave link design toll called: Pathloss 4.0 , the problem is after installing all modules are dimmed , if any one has seen this problem please help.
Also , i got the tool called : ATDI HertzMapper , if any one has documentation for it please help
here is the best book about this subject:
Signaling System No. 7 (SS7/C7)
Protocol, Architecture , and Services
you can find it on the forum and on emule
Re: Microwave Link
yes , exactly , i mean digital point to point microwave links , which are used in mobile networks as atransmission backbone between BTS's and BSC's and MSC's
Re: description about SIP
the both are session layer protocol,
the role of all session layer protocol is to setup, maintain and tear down sessions,
and they do not deal with the voice itself but they deal with signaling information associated with voice in order to deliver voice packets...
Re: VOICE OVER LAN
yes that's right , and main issue is the bandwidth of the ethernet LAN is 100Mbps , which is very huge in comparison with VoIP requirements, so , no Quality of Service QoS is needed , and as you are not going to pass through routers , so no session layer should be invoked...
one of the most famous applications for UDP is VoIP,
VoIP uses a transmission protocol called RTP "Real time transport protocol" which constructs packets based on UDP , in order to be very fast and real time , also retransmission and other acknowledgement techniques are insignificat with voice
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