Most people associate fixed-line telephone numbers with a real “brick and mortar” business and its location, while mobile phone numbers are considered “personal” and related to an individual only. This is why by using a fixed-line phone number on your website and business card, you will leave a more professional impression and gain more trust from customers.
Unbundled analog fixed phone numbers
TOT is the only analog fixed-line provider in Thailand offering unbundled landline phone numbers for 100 THB/month without requiring an internet connection. Local calls are 3 THB per call, calls to mobile phones or to other provinces are between 3 and 9 THB per minute. Caller ID is available as an add-on in some areas for 30 THB per month.
As of 2018, Thailand had 3.05 million fixed-line subscribers, breaking down to 70% home and small business users, and 30% office users.
Note: Phone lines are installed via a physical telephone cable. As there is no number portability for fixed-line phone numbers, you will lose your number when moving to a new location.
Recommended for: Small businesses that do not require an internet connection, alarm systems, and credit card payment terminals.
Bundled fixed phone VoIP lines
With recent rapid growth of fiber-optic internet network infrastructure, today many ISPs are offering fixed-line telephony via their fiber-optic network. This means increasing competition on the once monopolized market.
3BB, AIS, True, TOT and other ISPs now are offering fixed-line telephony services bundled with internet packages. Fixed-line phone service is available as an add-on, delivered as a VoIP service through the same fiber optic line as your internet – no additional cables need to be installed. In the comparison table below, you will find details about providers.
Note: If you cancel the internet service with your ISP, you will also lose your fixed line phone number. Currently, you cannot port any fixed line phone number to another ISP.
Recommended for: Small businesses that are fixed to a certain location, such as bars, pubs, restaurants, guesthouses, massage places requiring just a basic landline phone to make and receive calls.
Bundled fixed phone VoIP lines
With the rapid growth of Fiber-optic Internet Network infrastructure in recent years, many ISPs are offering fixed-line telephony via their fiber optic Network leading to more competition on the once monopolized market.
Today 3BB, AIS, True, TOT and other ISP’s are offering fixed-line telephony services bundled with their Internet packages. The fixed-line phone service is available as an add-on package to their fiber optic packages and delivered as VoIP service through the same fiber optic line with your internet. No additional cables need to be installed. In the comparison table below, you can find more details about each providers offer.
Note: If you cancel the internet service with your ISP you will also lose your fixed line phone number. Currently, you can’t port any fixed line phone number to another ISP.
Recommended for: Small businesses that are fixed to a certain location, such as bars, pubs, restaurants, guesthouses, massage places etc. that require just a basic landline phone to make and receive calls.
Unbundled fixed VoIP phone lines
Unbundled VoIP phone lines will allow connecting to your office phone numbers via any internet connection, thus offering more flexibility. Multiple in- and outbound calls can be handled simultaneously by a single phone number – without any caller getting a busy tone.
Note: When moving to a new office, simply connect your IP phone to an internet connection. No physical installation of any phone lines is required.
Recommended for: Companies and call centers that require flexibility and easy scalability for their business phone system. Phone numbers can be registered within any IP phone or IP PBX, on-premise or in the cloud.
Fixed Thai landline VoIP Number comparison chart
| VoIP Providers | 3BB | AIS | TOT | TRUE | VoIP Thailand | VoIP Thailand |
| Product name | 3BB Voice | AIS fixed line | TOT fixed line | Fixed line plus | Bangkok DID | Thailand DID |
| Apply at | 3BB booth | AIS shop | TOT shop | TRUE shop | Apply here | Apply here |
| Supplied via | 3BB FFTH | AIS FFTH | TOT fiber2you | TRUE FFTH / DOCSIS | any internet connection |
any Internet connection |
| Service availability | Addon to 3BB Internet package |
Addon to AIS Internet package |
Addon to TOT Internet package |
Addon to TRUE Internet package |
ISP independent via any Internet line |
ISP independent via any Internet line |
| Caller ID | included | included | included | included | included | included |
| concurrent calls | 1 | 1 | 1 | 1 | 2 | Starting at 5 expandable |
| Register in your own SIP device | Not available | Not available | Not available | Not available | Yes, register with any SIP device |
Yes, register with any SIP device |
| Supported SIP codecs | G.711, G.729 | G.711, G.729 | G.711, G.729 | G.711, G.729 | G.711, G.729 | G.711, G.729 |
| Calling rates | ||||||
| Monthly subscription fee | 49 THB | 100 THB | 100 THB | 100 THB | 200 THB including 2 channels |
500 THB including 5 channels |
| Package includes | Unlimited free calls to other 3BB voice customers | 50 minutes of free calls to any phone number in Thailand | Unlimited free calls to any TOT fixed line number between 06:00 – 18:00 | 150 minutes of free calls to any mobile phone number in Thailand | 266 minutes of free calls to any phone number in Thailand | 500 minutes of free calls to any phone number in Thailand |
| Calls within the same province | 1.50 THB/call | 3 THB/call | 1 THB/call out of free hours 1.25 THB/minute to other ISP’s network |
3 THB/call | 0.75 Satang/minute | 3 THB/call |
| Calls to other provinces | 0.50 Satang/minute | 3 THB/minute | 1 THB/minute out of free hours 2 THB/ call to other ISP’s network |
3 THB /minute | 0.75 Satang/minute | 1 THB/minute |
| Calls to Mobile network | 0.50 Satang/minute | 0.50 Satang/minute | 1 THB/minute | 3 THB/minute | 0.75 Satang/minute | 1 THB/minute |
