Thank You goes out to KK3OQ
Archive for category RF Gateways
TM271A Programming Cable
Aug 22
AskoziaPBX Installation
Mar 23
DARN is near
Dec 9
The Digital Analog Radio Network is near.
DARN defined as to mend by weaving thread across a gap that is what is being done. Those that want to see flexibility will go with the DARN approach, as a improvement while there will be others that find it to be just annoyance. DARN definitely fits the new Digital Analog Radio Networks.
Sometimes logic can indeed be simple (send in most potentially linkable exchange).
The Asterisk Amateur Radio Network – Madison/Huntsville, Alabama Group (AARN-MHAL) had its first meeting Thursday night (10July2008).
For additional details check out the new AARN-MHAL page.
URI Connection Guide
May 20
The URI Connection Guide (pdf) is available. Included in the URI Connection Guide is information for connecting the URI to Maxon LMR Transceivers (SM2500, SM6000, SD170) and Icom LMR Transceivers (F121/221) . Additional radios will be added as needed.
This is a interface for the Asterisk app_rpt radio control.
URI – USB Radio Interface
Asterisk app_rpt via USB
Sep 17
A new low-cost way to interface Asterisk app_rpt to radio can now be used with a USB sound adapter. Some modifications are needed to bring out the PTT, block DC on the audio outputs, and attenuate the receive audio to match the microphone levels.
A new low-cost way to interface Asterisk app_rpt to radio can now be used with a USB sound adapter.
Some modifications are needed to bring out the PTT, block DC on the audio outputs, and attenuate the
receive audio to match the microphone levels.
From the qrvc.com web site the following features are mentioned:
chan_usb radio contains all of the interface code to interface app_rpt to a CM108 based USB sound fob.
In addition it contains DSP code to do CTCSS encoding and decoding, squelch, pre-emphasis and soft
limiting, de-emphasis, and audio level adjustments.
Basically, you only need to make 3 or 4 connections to your radio:
- Discriminator audio, de-emphasized audio, or speaker audio.
- Transmit audio (direct to modulator, or microphone)
- PTT
A new doorway is quickly opening to continue the progression of Asterisk as the way to interconnectivity.
For more details about Asterisk app_rpt visit http://app-rpt.qrvc.com/
and information about Asterisk can be found at http://www.asterisk.org
What are FXS & FXO?
Sep 5
What are FXS & FXO?
FXS — Foreign Exchange Station
FXO — Foreign Exchange Office
An FXS device initiates and sends ringing voltage. FXS sends the voltage to an FXO device, which receives it.
The phone receiving the call is the last FXO device in the chain, and when it receives voltage from an FXS device, the phone will ring.
Connect the outside line to an FXO port on your Asterisk server to receive voltage from the outside lines.
Connect the phones to FXS ports on your Asterisk server. When the FXO module in your Asterisk Server receives the voltage, it will then generate voltage using the FXS module and send it to your analog phone.
Hint: Remember the “to”… FXS = FX(to)Station and FXO = FX(to)Office.
With “to” representing the direction taken by the signal.
A successful operations with ARMAD, (Amateur Radio Military Appreciation Day). We placed the field station in operations together with the Huntsville finest Ham Radio Operators.
From your left to the right, yours truly, Will / W4WWM, Randy / KE4AHP, and Nate / KC4PBM. Mark / KC4OML was taking the pictures, we will have more, also James / KF4QYX was on site and tried his hand at VHF/UHF node contacts on the western reflector 9258, which is a IRLP and Echolink channel cross link. James also checked the conferences for activity and directing information when he made contacts.
We also had Karl, AI4PJ our distance control operator and his XYL (most likely XYL to become a Ham soon hi hi) helping by calling into the net and checking difference node conference for activity, his XYL, Theresa sent the information to the media about the ARMAD operations on site at Bill Heard.
The HF crew was Nate and Randy. They were burning up the net making contacts all over the place. When they finished they had 31 HF confirmed contacts.
James and I were operating on the VHF/UHF/6 meters (FM) all were tie into the two reflectors even though we got a late start we made 20 contacts. Mark keep us all on track letting us know when we miss a call are when one was coming in.m He kept us all in line. Hi Hi
Most of all we had a lot of fun setting up, operating and tearing down.
We are ready for field day operations Hooha!! Hi Hi
Also, we would like to thanks Harlie (KB4CRG) for the use of the wide coverage VHF/UHF system. We where able to work both node with out a hitch. Good job on the linking it all work out just great!
73
Will / W4WWM
