Author Topic: SIP and VoIP (Read 1430 times)

yesitsme · « **on:** June 18, 2021, 12:24:33 PM »

SIP and VoIP

Tell me more

yesitsme · « **Reply #1 on:** June 18, 2021, 12:28:50 PM »

A quick glossary:

Terms used
VoIP: Voice over IP
SIP: Session Initiation Protocol
PSTN: Public Switched Telephone Network
PBX: Private Branch Exchange

Use cases
Intercom

PBX

Phone Service

Conferences

IVR

is there any use I left out?

popular open Source projects
Asterisk (Core)
FreePBX (User friendly GUI for asterisk)

when you use it and want to connect to the world PSTN
you must have
a Sip Trunk
DID Number
there are many options out there
but you gotta choose between good and cheep, unless its for personal use only

yesitsme · « **Reply #2 on:** June 18, 2021, 12:29:38 PM »

Wiki Added Thanks to @yesitsme

yesitsme · « **Reply #3 on:** June 18, 2021, 12:33:38 PM »

what good reliable Sip Trunking did you have a good experience with?

How many concurrent calls can it handle?

Alexsei · « **Reply #4 on:** June 18, 2021, 12:33:40 PM »

yesitsme · « **Reply #5 on:** June 18, 2021, 12:38:10 PM »

Quote from: Alexsei on June 18, 2021, 12:33:40 PM

POTS

Plain Old Telephone Service
isn't that old school, I want to knew about the digitized world but you can expand on that id you wish
https://www.getweave.com/pots-pstn-or-voip-for-your-business/
this got me confused isn't PSTN the bridge between VOIP and POTS?

yesitsme · « **Reply #6 on:** June 18, 2021, 12:43:25 PM »

https://www.google.com/search?q=The+copper+network+behind+landline+phones

avromie7 · « **Reply #7 on:** June 18, 2021, 12:43:31 PM »

Quote from: yesitsme on June 18, 2021, 12:33:38 PM

what good reliable Sip Trunking did you have a good experience with?

How many concurrent calls can it handle?

PM me for a provider who is extremely well priced with no games or gimmicks. I've used this provider at multiple locations without any issues.

You typically get a PRI which is 24 concurrent sessions.

avromie7 · « **Reply #8 on:** June 18, 2021, 12:49:08 PM »

Quote from: yesitsme on June 18, 2021, 12:38:10 PM

Plain Old Telephone Service
isn't that old school, I want to knew about the digitized world but you can expand on that id you wish
https://www.getweave.com/pots-pstn-or-voip-for-your-business/
this got me confused isn't PSTN the bridge between VOIP and POTS?

IIUC, PSTN is the backbone of the telephone network, it's not a bridge between VOIP and POTS. It's what connects every single VIOP or POTS line together, it connects any POTS to POTS, VOIP to VOIP, as well as POTS to VOIP.

yesitsme · « **Reply #9 on:** June 18, 2021, 04:38:04 PM »

https://getvoip.com/blog/2015/09/02/sip-vs-pri/

yesitsme · « **Reply #10 on:** June 20, 2021, 01:01:17 AM »

https://telnyx.com/resources/sip-trunk-vs-did

shwarmabob · « **Reply #11 on:** June 21, 2021, 04:15:17 PM »

are we going to duplicate other forums here? there is endless information on this out there. How about Linux?

ExGingi · « **Reply #12 on:** June 21, 2021, 04:38:40 PM »

Quote from: avromie7 on June 18, 2021, 12:49:08 PM

IIUC, PSTN is the backbone of the telephone network, it's not a bridge between VOIP and POTS. It's what connects every single VIOP or POTS line together, it connects any POTS to POTS, VOIP to VOIP, as well as POTS to VOIP.

VOIP to VOIP can avoid the PSTN if not trying to use phone numbers.

I still remember VocalTec which was one of the VOIP pioneers. The only way they used PSTN (in a way) was because most internet back then was dial-up (ADSL started becoming a thing then).

ExGingi · « **Reply #13 on:** June 21, 2021, 04:56:32 PM »

Maybe explaining some of the terminology in layman terms might help.

VOIP - the overall name for the technology used to digitize analog sound, compress it, and send it in packets (like all data is sent over the internet, as it is not a point-to-point direct connection) and reconstruct those packets on the other end into a usable digital stream that can be converted back into analog sounds (which is what our ears perceive) without getting choppiness, or other major challenges to the sound.

SIP - The protocol (kind of "computer language") used to connect two SIP trunks (SIP does for VOIP what the PSTN does for POTS, i.e. It's the way two end points reach each other in order to open a voice communication channel). A SIP trunk would be the VOIP equivalent of a "last mile" telephone line with a phone number associated with it. The SIP trunk uses a SIP URI where the PSTN would use a phone number (or a PBX would use an extension number).

This is how I understand things. If there are any experts that wish to correct me, I will be happy to learn.

yesitsme · « **Reply #14 on:** June 22, 2021, 01:37:32 AM »

Quote from: shwarmabob on June 21, 2021, 04:15:17 PM

are we going to duplicate other forums here? there is endless information on this out there. How about Linux?

https://forums.dansdeals.com/index.php?topic=51457.0

https://forums.dansdeals.com/index.php?topic=88717.0

shwarmabob · « **Reply #15 on:** June 22, 2021, 10:10:56 AM »

Quote from: yesitsme on June 22, 2021, 01:37:32 AM

https://forums.dansdeals.com/index.php?topic=51457.0

https://forums.dansdeals.com/index.php?topic=88717.0

OK, you are right.
I have been using voip for over 20 years. There was a German prof at Columbia U - I don't recall his name - decades ago who played a big role in developing SIP.
https://www.cs.columbia.edu/sip/

yesitsme · « **Reply #16 on:** June 23, 2021, 09:07:51 PM »

Plantronics and Polycom are now together as Poly.

Quote

We were big fans of OBiHai once upon a time. But then they sold out to Polycom. And they subsequently sold out to Plantronics. And support has gone from bad to worse along the way.

yelped · « **Reply #17 on:** June 23, 2021, 10:40:50 PM »

Quote from: yesitsme on June 23, 2021, 09:07:51 PM

Plantronics and Polycom are now together as Poly.

I see you like catching up to a few year old news.

yesitsme · « **Reply #18 on:** June 27, 2021, 12:06:57 PM »

https://www.linkedin.com/pulse/faqs-sip-vs-chansip-chanpjsip-kent-adams/

yesitsme · « **Reply #19 on:** June 27, 2021, 02:47:31 PM »

https://www.pjsip.org/about.htm

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Author Topic: SIP and VoIP (Read 1430 times)