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DFR Telecoms VOIP Diary

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2020

Posted on 2 January 2020 by Roger

Roger popped into Norchard to set up remote access to the Norchard-B (Raspberry Pi) PBX. It required some Port Forwarding rules on the BT Hub and the MikroTik firewall. This will allow remote testing and diagnostics and be handy when the Dell PC settings are migrated over to the new Asterisk gateway PC. Sam also popped in and they had a chat about the things that will be discussed next Wednesday.

Posted on 3 January 2020 by Roger

Roger managed to find some newer Avaya firmware for the 46xx series phones which meant that 4602SW IP handsets with old bootloader firmware could be upgraded with a new bootloader and in turn upgraded with Avaya's SIP firmware. He upgraded two phones via the Parkend Raspberry Pi VPN.

Posted on 4 January 2020 by Roger

Roger continued with some work on the Avaya SIP phones. At Parkend a problem had been seen when a phone gets unplugged during a call. Asterisk did not notice the phone had gone offline and kept the call open even though the handset was no longer online when a POE switch is rebooted or a cable gets unplugged during a call. However Asterisk should have been looking for RTP audio packets and detecting that the phone was not sending any RTP data. Turns out that there is a bug in the version of FreePBX in use on the Pi. FreePBX has a global "RTP Timeout" setting but it is not being picked up by the Asterisk PBX. Hand editing the Asterisk config file works but this hack would be lost next time FreePBX re-generates the Asterisk configs.

Posted on 5 January 2020 by Roger

Roger popped down to meet Sam and Charles. Roger and Sam fixed extn 4710 (SIP phone) in Parkend Signal Box and removed Peter's old Netgear switch which had been replaced by a Cisco POE switch. They discussed how to send the pulses used by the station clocks over the Internet. Sam tried to busy out one of the strowger to asterisk junctions and Norchard but was not able to. This was just a stop gap until the new asterisk gateway is installed.

Posted on 11 January 2020 by Sam

Sam, Roger and Peter met up at the Postage Stamp cafe for a pre-work cuppa. Once this was complete, they descended upon the office at Norchard.
Sam and Roger retrieved phones from the attic so that Peter could flash the firmware to the latest version.
Roger then set about turning a Raspberry Pi into a new asterisk server for the 44XX numbers. Once this was complete, Sam and Roger then set about changing over the incoming calls to the new server by changing the port-forwarding in the router. Roger then worked on some of the extra features required on the Pi.
Sam and Peter, whilst this was ongoing unboxed, flashed and re-packaged approximately 70-80 phones. All of the phones are now available to be pulled out of any box and simply plugged in.
Once this was all finished, we tried to pull a few remaining settings from the old asterisk, however it took this exact moment to die completely. Sam and Roger therefore retrieved it from the exchange and took the telephony card from it and put it into the new Gateway PC. This machine is very tight for space under the case, but is a nice wall-mounted box. Roger then set up as much as possible before he had to depart. Currently, everything bar the telephony card works, this requires some more configuring!
Sam and Peter finished by tidying the office, and having a discussion about the wiring in the room.

Posted on 12 January 2020 by Roger

Here are the latest Jan 2020 VoIP Schematics in PDF format.

Main changes are that Norchard now has three digital PBXs.
One serves our home SIP phones and home ATAs and serves dial-a-disk on 4416 and Thomas on 4402 and the Speaking Clock on 4400 and 4403
A second serves Ext 4500-4599
The third acts as a fairly dumb gateway between the digital PBXs and the Strowger and will output the speaking clock on LineOut for Strowger when I get time to reinstate Paul's work.

Posted on 13 January 2020 by Roger

The updated Asterisk Ringback service is now live. Currently it sits on Ext 4404. If you call it you get to hear my voice. Asterisk then calls you back (and you get to hear my voice again).
I based it on Paul's system but had to re-write it to works across multiple exchanges with trunk links (aka junctions). So you can call 4404 from Parkend and the Norchard Asterisk will call you back.

Posted on 18 January 2020 by Peter

Peter went in to the railway today and shifted the gateway from the office to the telephone exchange. Before the gateway even had power connected, upon plugging in the 2nd FXO port to strowger, the line circuit was seized. This has been left disconnected. The first FXO port seems to have a faulty connector. Both FXS ports give no dial tone but pretty sure Roger has this in hand. The fitting of the gateway still requires trunking along with all the other data bits and pieces. The ATA for the museum and 4490 have also been moved and are properly fitted. A new SIP phone is now sitting along side 4490, this is not in service as it requires PoE. There is a need to consult with Rick as he wishes to alter the existing shelving. A sort of so so day but at least the gateway is where it should be. Do not expect to progress much more with this at the moment as the junction needs to be finished. Does any one know anything about the keyboard in the exchange being faulty? It has a random note saying Out Of Order but not a name to be found. In respect of the gateway a full check of the wiring needs to be done and along with this the cover of the gateway needs to be marked with what ports are what, to bring it into line with the sockets below.

Posted on 8 February 2020 by Roger

Peter and Roger met to discuss the forthcoming VoIP work. They discussed the CAT5 data cabling at Parkend (Exchange to Signal Box and Exchange to Station Building) and the merits of a bundle of point to point cables vs one cable and a mains powered switch vrs intermediate patch panels. Plan is to run individual CAT5 cables and keep one central POE switch which could have a UPS. Then they popped down to Parkend to look at breaking into the new troughing and where Ethernet sockets will go in the Signal Box. While they were at it a fault was resolved on the RJ11 patch panel. Our RJ11 sockets are loose and over time the patch cables work loose, breaking the connection to the phones. The RJ11 patch panel was a great idea. This particular setup will have to go.
Work then turned to a refresher on the Parkend Outgoing Junction 3 regenerating relay set John had built. It is not in use and Roger was interested in it for some testing and as a possible digital junction to Norchard Strowger. It used to be wired into an ATA. Peter used John's diagrams for Outgoing Junc3 and the Tone Generator to follow the cabling from the relay set to the Solder Tags. The wiring stops there (cabling into the Krone MDF and the ATAs has been recovered). So Roger may ask for that to be restored for some testing of Strowger to Asterisk.


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This page was last updated on
9th February 2020