In my Previous blog post, I explained how to connect a digital keypad with ProTalk door unit. That was entertaining was is`nt :). Now lets add a push button to the previous scenario to make things more exciting.

The blog post will go through the process of attaching all three components together. Each module comes with separate connection cables that can be found in packaging. You should have following cables with each module.

a. :

>> 1 x 8 pin connector (CC8)

b. :

>> 1 x 5 pin connector (CC5)
>> 1 x 3 pin connector (CC3)

c. :

>> 1 x 3 pin connector (CC3)

Lets start connecting these components step by step.

1. Connect CC8 cable to 8 pin connector on Audio Video module.

2. Connect one end of CC5 to Output(CN2) and one end of CC3 cable to Input(CN1) connector on the keypad.

3. Connect CC3 cable to the Input(CN1) on the push button.

If everything is connected correctly, it should look something like

Now lets move forward to last few step.

4. Connect other end of CC3 cable connected to push button to LT(3 pin) connector on A/V module.

5. Connect second end of CC5 cable from keypad to EXP(5 pin) connector on the A/V module and CC3 cable to the Output(CN2) on the push button

6. Finally, last step is to connect the CC8 cable to the push button. One thing to keep in mind is, each cable from the 8 equate to “key 3-10” on the web interface. i.e.

black = 3rd pushbutton
orange = 4th pushbutton
green = 5th pushbutton
white = 6th pushbutton
red = 7th pushbutton
yellow = 8th pushbutton
brown = 9th pushbutton
blue = 10th pushbutton

Since our scenario just has one push button in place, I need only one out of 8 cables i.e. Black. So last step is to plug the stripped end of the black cable to the green screw terminal block on the push button.

Click picuture 1 or 2 to see final connections.

NOTE: Microphone is part of front frame on Skyline units and not shown in pictures above. Please make sure to connect it to the sip module

Now log on to the web interface of the door unit and configure the unit to get things started.

This blog post explains connecting and configuring of a

Connections are quite simple. Cityline Keypad comes with two different cables.

1 X 3 pin connector
1 X 5 pin connector

Step 1: Connect the 3 and 5 pin connector to INPUT and OUTPUT connections on the cityline keypad board.

Step 2: Connect 3 pin connector to connection LT (point 19 on this picture) of the Audio/Video module

Step3: Connect 5 pin connection to EXP connection or connection 18(Please refer to digram in step 2).

Step 4: Finally to be able to dial numbers from keypad,
login to the web interface of the door unit and go to Basic Parameters.

Change the following settings:

1. Keyboard to position : 1
2. Under mode of keyboard choose Direct choice number (phone)

Thats it. Now enter the number and press the A button to dial it.

To unlock the door using keypad, configure unlock codes under Relays section of web gui and save changes. Finally press the B (Bell) button and enter to code to unlock door.

If you don’t want a unit with a keypad and only interested in 1 or 2 button door entry products please look at the our ProTalk range.

Security of IP telephony systems is a hot topic at the moment, it has been for quite some time and is should always be at the forefront of anyone’s mind when setting up such a system.

There are loads of methods and applications for securing PBXs and the like but something I often see overlooked is security of the actual phones themselves.

The usual threat is someone obtaining SIP credentials by looking at the phone’s web interface. In some cases, IP phone devices have the password displayed in plain-text for all to see. Slightly better implemented GUIs have the password obfuscated when you look at the page but still readable by viewing the page source code in your web browser.

If ProVu ever become aware of any products we sell with either of these issues, we push the manufacturer make changes to hide the password at all times.

Further to this though, anyone installing IP phones should really set strong web interface usernames and passwords. I see phones put on public IP addresses or sometimes with port forwards (often for support purposes) that have no passwords set! This is like leaving the front door to your house wide open while you go out to work all day. Please remember to set a username and password. If a phone comes with a default username and password then do not leave this set as you can be certain the people who want to break into your phone will know default passwords for various phones.

ProVu can set usernames and passwords for phones using our provisioning services:

ProVu fulfilment services

cheers,
Paul.

Over the last few weeks we have been taking lots of support calls from people with NAT issues with phones using Draytek routers.

The 2820 seems to be the main router affected but it could be others.

The problem manifests itself with SIP phones losing Registration to the SIP server with 408 time-out messages. In most cases it is weird in that some phones on the network will work fine and others wont.

The fix (which is confirmed by Draytek themselves to a couple of my customers) is to downgrade to firmware version “333”.

This problem occurs even if you have the SIP ALG turned off. Please ensure the ALG is off as this can cause even more problems, it is usually off by default these days.

As a side note, please make sure you are not using a Draytek router with “voip” ports, the model number will usually have a “v” in it. These are not suitable for use with stand-alone SIP phones connected to the network, they are only use if you are ONLY using the built-in VoIP ports. There is no fix other than swapping the router out as far as I’m aware.

cheers,
Paul.