Tech geek. Life geek.

Tag: voip (Page 1 of 4)

Replace OBi110 by OBi200

I have a OBi 110 for many years. I used it for my Google Voice and another SIP provider. But last year, the OBi is not working with Google Voice anymore. Even I flashed the firmware. It extended the life a few months.

I have a brand new OBi200. I bought it in June 2017. Cost me  US$47.46 plus tax.

The old OBi110 is much cheaper than before. I paid US$66 in 2012.

Continue reading

Can not use Google Voice with Obi device anymore

Actually, it is not a news. I knew it almost a year ago. But now it is the time.

Google Voice: Not Supported on OBi Devices After May 15, 2014

Back at the end of October, Obihai announced Google would end its support for the XMPP communication protocol. This announcement came on the heels of Google’s announcement that as of May 15th, XMPP would no longer be supported for third-party VoIP applications. The Google Voice service uses XMPP to connect the OBi to the service. With that, after May 15th Obihai will no longer support the Google Voice service on its OBi devices.



So, it is time to find a alternative service provider. Maybe I will choose one from the following:

Security for VOIP

Information technology has seen a major development in this decade that has created more innovative products to make communication faster and cheaper than we expect. Internet telephony or the (VOIP) voice over internet protocol is one of the major development that has made voice transmission more clear, fast and cheaper. Broadband service and fiber optics have facilitated the growth of VOIP technology and is expected to be used in a wider spectrum. There are a few threats or cautions like spamming, spoofing and identity threats that have been alarmed since the emergence of this technology.
1. (SPIT) Spam over internet telephony is a mix of telemarketing and spam. Calls are free or cost much lesser not just for customers but also for marketing companies. A large volume of VOIP calls and messages can pile up in your inbox which will be sent using automated programs. Also they will occupy large mega bytes of storage which can reduce the traffic of genuine and wanted messages.
2. Spoofing is a method of creating a mask or fake identity using the internet telephone. Since internet telephone use a MAC (Media access control) address for identification, spoofing of the MAC also possible. This can help hackers and attackers to make the customers believe that the call is from a known or trusted source. These calls can make the customers disclose personal information like account numbers, (SSN) Social security number and other authentic information.

Continue reading

Another VOIP service provider – SmartVoip

From VoipStunt to poivY. Now I start to use SmartVoip.
These three service providers are same compony with different name. And I also think they use same user database.
Because when I try to use same name of VoipStunt on Poivy, it show me that the user name is taken by other people.
They all provide free call to Mainland China on landline and cell when they are just launched. Later, the free cellphone call is taken away. And more later, the China is not free any more. Then I have to switch to another VOIP provider.
So if you have time to go through these three provider. It approves my point.
Voipstunt doesn’t provide free minutes to China.
poivY has free call to China, with Landline only.
SmartVoip does provide free Landline and Mobile to China.
SmartVoip has a little bit difference from the others.
It ask for EUO$15 to top up the credit instead of EUO$10.

Continue reading

Improve VOIP traffic in WRT54G

WRT54G Router,
DD-WRT 24 Sp1 firmware.
To improve VOIP traffic in the network, I put VOIP adapter mac address into the QoS features.
* Under ‘MAC Priority’, enter the MAC Address of the device
* Click ‘add’
* click ‘Save changes’
I put my SPA-2002 VOIP adapter at Premium priority.
After one week using, I fell the VOIP telephone/ conversion has better quality without jiggly.

SPA-2002 Daylight Saving Time setting

The phone connected with my VOIP adapter, SPA-2002, is always get the wrong time. You know, we live in North America, with Daylight Saving Time. The clock of phone will update depending on the time info from the VOIP adapter.
Even I change the phone set time manually, it will changed back next day.
So the setting of clock or time on SPA-2002 is the key issue.
Let’s see how I did to make it work perfectly in Canada.
1) NTP server.
I choose the Canadian NTP server pool. Enter the following server address into NTP server field.
2) TimeZone.
I am in Vancouver, Canada. Choose GMT-08:00.
3) Daylight Saving Time Rule
In the ‘regional’ tab, Daylight Saving Time Rule field enter the following data.
start=4/2/7/2:0:0;end=11/1/7/2:0:0;­ save=1
4) Save and it works.

Continue reading

VOIP codec choice

When use VOIP service with a VOIP adapter, you have to choose the codec.
The codec is very important. Unsuitable codec will make your call intermittently.
Codecs are settings used to fine-tune the audio compression of your VoIP devices.
Different codec needs different bandwidth.
The following protocol header assumptions are used for the calculations:
40 bytes for IP (20 bytes) / User Datagram Protocol (UDP) (8 bytes) / Real-Time Transport Protocol (RTP) (12 bytes) headers.
Compressed Real-Time Protocol (cRTP) reduces the IP/UDP/RTP headers to 2or 4bytes (cRTP is not available over Ethernet).
6 bytes for Multilink Point-to-Point Protocol (MP) or Frame Relay Forum (FRF).12 Layer 2 (L2) header.
1 byte for the end-of-frame flag on MP and Frame Relay frames.
18 bytes for Ethernet L2 headers, including 4 bytes of Frame Check Sequence (FCS) or Cyclic Redundancy Check (CRC).
So the most used often protocol/codec are listed below.
Codec Name – Bandwidth Ethernet (Kbps)
G.711 (64 Kbps) – 87.2 Kbps
G.729 (8 Kbps) – 31.2 Kbps
G.726 (32 Kbps) – 55.2 Kbps
G.728 (16 Kbps) – 31.5 Kbps
So, if you use two computer and one game palyer, or Wii, and the Voip Adapter in the same home network, you’d better set codec to G.729 to save the bandwidth and get better voice quality.



Change my long distance phone service provider to poivY

I used Voipstunt as my long distance phone service provider almost two years. It gave good quality phone connection.
Now I change to poivY. A new voip provider name, but actually same company as voipstunt.
The most important reason is that China main land is the free call country in poivY.
All setting is similar to voipstunt. Let me describe how to use it.
1) Sign up the account.
2) Buy credit about US$15 to top up the account.
3) Call free in 90 Freedays to free countries or area.
Including Canada, Chian, USA, UK, etc. For full list please click here.
4) Max 300 minutes per week of free calls.
5) After 90 days, the normal rate apply.
Say, China USD0.027/min, USA USD0.02/min.
The Setting of SIP device shown as below:

SIP port : 5060
Registrar :
Proxy server :
Outbound proxy server : leave empty
Account name : your PoivY username
Password : your PoivY password
Display name/number : your PoivY username or voipnumber
Stunserver (option) :

You can still download the softphone to use through your desktop.

Continue reading

« Older posts

© 2020 David Yin's Blog

Theme by Anders NorenUp ↑