30 November 2011

N-TEC Access Control eSeries - Identifying Communication Problems

In some cases you might not be able to send or receive new data from the eSeries (IDCe & IPCe) access controllers. This is most bropably the cause of a network communication failure. To determine whether a network connectivity problem is being caused by a mis-configuration or by a problem in a network device you can run the following service application.

Open "Comms Simplex" and from the "View" tab select "Line Controller". A successfully configured and responsive controller displays the message "e-series".

In case you see "Connection to port failed - TIMED OUT" or "Connection to port failed - HOST UNREACHABLE" you may have a broken route from your computer to the destination host, causing packet loss.

12 November 2011

Testing MUXLAB Quad Audio Balun

Overview
The Quad Audio Balun allows up to four analog line audio signals to be transmitted via unshielded twisted pair (UTP) cable in a point-topoint connection. Used in pairs, the Quad Audio Balun allows up to four (4) coax audio cables to be replaced by one (1) Cat5e/6 cable.

Applications
Custom commercial and home audio systems, intercom systems, rental and staging systems, audio-video conferencing systems.

Features & Benefits
✖ Cost-efficient cabling – save up to four (4) cables
✖ 20 Hz to 20 KHz bandwidth for high fidelity
✖ Analog audio up to 1km via Cat5e/6
✖ Compact design for neater wiring

Testing
Inside this little box you will find a canadian made PCB with one RJ45 socket on the cat5 end, and 4 gold plated RCA plugs of good quality. The four transformers adapts audio signal to 100Ohm of cat5. Tested on a spool of 200m. DINTEK CAT6 (E190815 UTP Cat.6 (PVC) UTP, 23AWG, Solid). The results were quite satisfactory. We had no signal attenuation, or high levels of noise.


The following are some audio samples over UTP CAT5 from our tests containing
✖ 4sec. recording of grounded input, +60dB amplificaion.
✖ 4sec. recording over 200m. CAT6 with Balun Installed, +60dB amplificaion.
✖ 4sec. recording over 200m. CAT6 without Balun, +60dB amplificaion.