Party Vibe

yes, this is classed as a “mobile phone” (it would be possible to connect an accu to the DC power in on the Nokia terminal); although it is fairly modern (2000s, and has both GSM 900 and 1800 frequencies) – I was surprised it would work with pulse dialling and had enough power to ring the old style magneto bell on the 700 series phone (this one was built in 1972 in Scotland, so is as old as me!). The Nokia terminal was previously on the wall at ICR-FM along with a 1990s era Samsugn PABX (I would have tried to get the whole lot working but the setup software for the PABX is impossible to find; and support for this Nokia kit has been abandoned since the Microsoft takeover but I managed to find a manual on the KPN website)

first video is inbound calling (listen for the sound after the first ring, that is the ETSI FSK caller ID signal), second is outbound pulse dialling (to the PVR / VFR voicemail number). The Nokia kit can also be set for the the other caller ID signalling used in Denmark (which the Americans have never got right for Asterisk) as well as changing the disconnect clear signal time (this is important to make Asterisk realise

Pulse dialling is however a tedious process with modern telephone numbers (until the 1990s many smaller parts of the UK had only 3 or 4 digits in a local telephone number) – I have now connected the Nokia terminal to a spare FXO (trunk line) port of a VOIP adapter on my phone system that I had not been able to use due to its echo canceller being no good, but a GSM terminal already has one built in. This has the advantage that I can use my house phones to call mobiles using inclusive/free minutes, and also route the mobile connection to any other part of the telephone system.

warning : mind your ears on the second video if using headphones or listening on big loudspeakers – I forgot how strong the output of a carbon microphone is and it howled the monitor speakers on my test set (which I had turned up so the audio from the line can be heard). These phones can even be used to bug rooms because of this; I am also building an old style line circuit so once I’ve worked out the component values will show how this was done..

https://www.youtube.com/watch?v=fzWW__TE6wc