Telephone System

Project: Telephone System
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Description	Telephone Communication System
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synopsis

Create and/or implement a telephone communication system for companies to communicate with the front desk or vice versa, for notifications, emergency and-or quick automation.

This idea was mentioned before: not only can we be informed there is a pizza delivery boy at the desk, but also other companies can benefit from a telephone/intercom system.

The cheapest setup would be SIP/RTP (VoIP); make use of the current network infrastructure. I happen to have a system with FreeSWITCH running, but it's currently in experimental mode.

Be aware that FS has a very steep learning curve, but once you get the point, you'll never want to go back (hint: regular expressions ftw)

implementation

Current setup consists of the following:

1. a public accessible number
2. simple IVR menu
3. permanent space phone (1001)
4. simple conference room (3100)
5. various participant registrations (see #extensions)

extensions

This is the list of registered extensions. If you want to register your own extension, let Xopr know. For available extensions, refer to the #dialplan

(refresh table)

Extension	Reference
172	Coolepascal
109	DECT
150 151 152 153 154	MCH2022
100 150 170 176 177	Reserved extension numbers
191	Stuiterveer
196	User:xopr
199	Vicarious
150	WHY2025
102	hACKspace
101	slACKspace
103	stACKspace

dialplan

The current dialplan expectation is defined as followed:

dialplan regex	destination
100\d	ACKspace (member) extensions
10[1-9]\d	Other extensions
19\d\d	Offsite extensions

Complete dialplan, compatible with Dutch PSTN as monitored by Opta

dialplan regex	type	remark
01[12356789][\d]{7}	Geographical numbers
014	Internal network service	seems to be the full number
0[2357][\d]{8}	Geographical numbers
044[\d]*	European routing	length unknown
06[123458][\d]{7}	cell numbers
066[\d]{7}	Pager
067[012345789]{3}	ISP access
0676[12345789]	[UNREGISTERED]
06760[\d]{7}	ISP access
069	[UNREGISTERED]
0800[\d]{4}	Short toll free information numbers
0800[\d]{8}	Long toll free information numbers
081	[UNREGISTERED]
082[01456789]\d\d	VPN
082[23]	[UNREGISTERED]
083	[UNREGISTERED]
08[47][\d]{7}	Personal assistant services
0(85|91)[\d]+	General Electronic communications
086	[UNREGISTERED]
088[\d]{7}	Business numbers
089	[UNREGISTERED]
090[069][\d]{4}	Short paid information numbers
090[069][\d]{8}	Short paid information numbers
09[2345689]	[UNREGISTERED]
0970[\d]{8}	available
097[1-9]	[UNREGISTERED]
100[\d]	Carrier select	ACKspace main
10[1-9][\d]	Carrier select	TBD.
112	European harmonized
116(000|006|111|117|123)	European harmonized
12\d\d	Harmonized for own network
1200		services
13\d\d	Local network facilities	special services
14[1-9]{1,3}	Harmonised services of social value
140[1234578][\d]{1,2}	General Affairs Department
15[\d]{3}	Pager	TBD.
16\d\d	Carrier select
17[0-8][\d]	Mobile network codes	TBD.
179\d\d	Pager
18\d\d	Subscriber information service
19[\d]{3}	Pager	Registered users external
(045) 2201000-2299999	[AVAILABLE]	Local emergency call
(045) 4200000-4299999	[AVAILABLE]	Xopr(?)
(045) 4400000-4499999	[AVAILABLE]	Local emergency call
(045) 9[\d]*	[UNREGISTERED]	(Local) emergency call, 911, 999
2222|4444|112|911|999		(Local) emergency call

todo

• Correct dialplan (faster dialing)
• Open up 19xx registrations
• Trunking over VPN
• install PoE blade
• add other extensions (other residents)

history

CCC

The CCC Binary Voice Radio telephony server was a mixed success. Actually, it was a disaster: -The visual ring indicator circuit didn't trigger the optocouplers so that was the first thing to fail. -a lot of power failures which caused a lot of downtime and eventually database corruption -the DECT system was getting too complex for the simple phones we've modded for field reporting (Technical clarification came from one of the Eventphone key people who explained that the antenna register on cheap phones was too small to identify them all). Besides that, it looked like the cabling had short-circuited because the 9v battery didn't have any oomph left to generate amplified audio. -wifi had a hard time maintaining the links and coverage wasn't 100% so the wifi field reporter wasn't a good alternative -last but not least: the public ip addressing threw a spanner in the works and the server went limbo. The server's database went corrupt, and after a restore, it didn't match the regular config files. I got it semi-working after it was far too late to make it useful to the studio. Also, after I got it to work, it wouldn't register correctly to the Eventphone trunk and we only got to call the editorial room (2781|BVR1) via DECT twice or so. Despite all that stress, it was promising, so better luck next time.

Open door day

For the open day, I set up a stand-alone test system with two Cisco 7940s, a FxS/FxO and dual FxS ATA, which included some softclients.

The phones were successful in a rough field test on the open day, connected to a FreeSWITCH exchange and two ATAs which provided connections to two additional analog handsets. The field test proved reliable enough and a great platform for some hilarious phone pranks.

The Cisco phones had a menu where you could view a 2 bit grayscale snapshot of the two space cams, and you were able to switch some outlets. People were allowed to navigate the configs and exploit functionality and LuckY sniffed and replayed audio over a wifi link.

future

• Move the current setup to the SAN server and release the current setup as a ACKspace FS playground.
• Create a larger deployment of the VOIP network as a testing ground for a more high-traffic environment.
• Stoney would like to build a visual ring indicator which flashes once somebody calls a specific number.

notes

Here's some information on how to power the Cisco 7940's through standard PoE switches. As featured on CampZone 2011. Thanks, Stoney