Subj : VOIP
To   : Vince Coen
From : Alexey Vissarionov
Date : Wed Jan 30 2019 16:06:00

Good ${greeting_time}, Vince!

29 Jan 2019 15:09:22, you wrote to All:

 VC> I am considering getting one or more phones for voip and if
 VC> successful kill off the land line.

Start with setting up the server with Asterisk (https://www.asterisk.org). 
Personally I prefer setting up the full-featured domestic server to be the 
gateway and storage, and use it for anything else as well.

 VC> Currently and because of where the land line connect is I use a set
 VC> of four mobile phones linked to the one base station.

I guess these phones are not mobile (like GSM or CDMA), but just portable 
(connected to their own base station, most likely DECT).

 VC> Can I do the same for voip phones

Yes. The easiest way is to use Android (it is Android/Linux, of course!) 
smartphones with some SIP client like com.csipsimple or com.zoiper.android.app 
or org.sipdroid.sipua (look for them at google play or apkpure.com) or whatever 
you'd like most.

Also, there are SIP adapters for land lines and mobile phone connections: 
https://www.aliexpress.com/item/GoIP-SIP-GSM-Gateway/368322989.html - 43.22 GBP 
(49.48 EUR) for a small device with SIM card slot and ethernet connector (good 
for setting up additional "lines" for incoming calls). Just connect it to your 
Asterisk server.

 VC> and the next uestion is what do I need to connect the facility up as
 VC> I do not recall my router having a setting for VOIP but there again
 VC> have not gone looking that closely.

In order for Asterisk server to work properly, there _must_ _not_ (as in 
RFC-2119 and FTA-1006) be any router except the server itself. Any other 
configuration (although possible) is not what you'd like to face when 
configuring the service for a first time.

 VC> This is for use in the UK and my ISP is Plusnet.

Do you have "real" (routeable) IPv4 address?


--
Alexey V. Vissarionov aka Gremlin from Kremlin
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