siptowhatsapp

SIP To WhatsApp Gateway for Converting SIP (session initiation protocol) Voice Protocol RTP Audio to WhatsApp Voice Call Protocol, This also converting WhatsApp Voice Call to SIP Extension / Openpbx (which called "forwarding inbound" external gateway to openpbx extension), for SIP to Whatsapp process we called that "forwarding outbound".

I made presentation for the project in 2020, for possibly some company invest this, and 2022 has come yet.

(click for see the presentation in youtube)

What we are doing is showing that this is possible, and possibility for other messaging/voice call platform too like Viber and Telegram.

Please be noted that this project not allowed to modify the WhatsApp Application Messaging (apk), so we must able to do converting data via Android Framework AOSP side, which is fully open source.

Supported Android Phone :

• 30$ Xiaomi Redmi 4a (Rolex) / Redmi 5a (Riva)
• 20$ Used HTC M8 (all variants)
• 30$ Used HTC M10 (all variants)
• Xiaomi Mi 4c ..
• Asus Zenfone Max Pro M1 (X00T X00TD) (Recommended, Price is Good and Quality)
• on Request Android Phone Manufacturer X - Model Y. ... (need time to develop and tweak, best to buy multiline)
• Android X86 ROM (on request,price different, price is per package not per line)

Contact person for demo/inquiry our service

(we sell per minute service or rent our device/app with remote access ) : Call WA +628979993336 Din

Interconnection With Your SIP Server ( READ THIS !!!! before you have idea of something )

For inter connecting sip2wa to your ip pbx server or someone called it softswitch, this is what you need :

You need to provide SIP User/Credential in your sip server to us if you want demo interconnection to us (with sip2wa) :

Company name or Alias (just for connection name in our system) : eg. SuperTop Telco.

Public IP Address: eg. 103.100.1.XX

Sip Server Port: eg. 5060

Sip User: eg. sip2wa_1001

Sip Password : eg. sip2wa_password

we are under nat ip address, so make sure nat enabled for that user. Make sure you softswitch/sip server, support calling to sip account with nat (dont have public ip address).

We will provide prefix to dial .. (example : 00111) usually 5 digit prefix, then you can dial with country code like : 00111628979993336 ( 62 is country code Indonesia)

Set codec to G722 for HD Audio Quality (wideband), Its recommended because WhatsApp use 16k sample rate. There is always customer who want low quality audio (narrowband 8k samplerate), use G711 ULAW Codec.

Please noted : after we confirm you sip credentials is ok and registered, use that credential as trunk to dial with prefix 00123 like :

1. 00123628979993336 to dial test for introduction voice and echo test , to make sure voice is ok both ways.
2. confirm you own prefix for dial to your own route calls.
3. Monitor for profile/codec issue, usually hangup after 1-2 seconds. we dont accept many profile/codec issue attempt.

Rules :

1. • Dont set or having setting auto hangup in X sec if no ring, we will do auto hangup ourself if the person if offline after 15-20second,
2. • will auto hangup in 1-4 seconds if after processed is non whatsapp,
3. • will auto hangup in 1 second if filtered like already in Non WhatsApp database, or any other filter.
4. • If the call is still ringing after 20 seconds it mean the person in WhatsApp and Online, and the whatsapp phone is ringing but not yet answered.
5. • We will remove/stop the traffic if not follow this rules.
6. • Always monitor for codec/rtc issue on call that answered but hangup in 1-2 seconds, mean having issue from many reason, 1%-8% of traffic is normal, but higher is mean have problem from your side.

We dont support any other codec.

Please be noted we dont accept

1. no 1. voice broadcast do multiple lot of calls in same time. which usually ACD less than 1 minute,
2. no 2. OTP Voice
3. no 3. IVR Blast/ Automation/ Automatic Dialer
4. no 4. [Filtered call] Dont cut call/force hangup before ended by sip2wa server, if you do this twice, will be rejected call for entire day.
5. no 5. [Filtered call] If called person offline, then third call will be rejected automatocally.
6. no 6. [Filtered call] For non whatsapp, will be rejected automatically (we save non whatsapp database)

we dont accept this request.

We provide per minutes for Outbound Non CLI to WhatsApp Voice call. Please inform us Country (+Country telephone code) and Estimated Price perminutes. Usually we assign port(s) and assign more depend on asr/acd and we accept USDT payment or wise.com postpaid weekly.

Sip code result for different result of calls.

1. Sip code 200 , normal answer
2. Sip code 488, for non whatsapp dial result.
3. Sip code 503, filtered / rejected call like in no 4, 5 and 6 filter.
4. Sip code 486 for offline phone (after 15-20s try), or voice call that rejected by whatsapp user (callee).

(after we set sip2wa to connect ) Then You can dial sip user : sip2wa_1001 with The Caller, Caller ID, changed to destination B Number. example this dial plan in asterisk :

same => n,Set(CALLERID(all)=${EXTEN})

a. IP PBX Server on the Internet with public IP. someone else with softphone or IP Phone that use random ip /4g internet or/and behind nat can connect As Extension (using user/pass) example 101 can dial to 102, no signaling issue, no audio issue. (What is softphone example: Microsip/LinPhone)

b. When you dial to Person-A number whatsapp, Person-A will see calling from DEMO-B number, A will not see call from President of USA number or any number you expected to be. DEMO-B number is WhatsApp number you register as Account in Sip2Wa app.

c. You have IP PBX Server that capable someone with microsip or Linphone connect to your server as Extension. Using User and Password. You hear the audio coming from this extension, inbound/outbound. Codec must be set to G722 for HD Audio, or G711 ULAW for Low Quality Audio.

d. You cannot use trunk style ip to ip connection, sip2wa are an extension that use random ip.

e. You have tested this demo below and its working in your environment.

f. When you dialing someone on whatsapp that are offline-internet connection, you will still see the ringing and dialing status until few seconds trying until whatsapp stop itself trying to dialing the number, you cannot expect dialing non whatsapp number or offline-internet whatsapp account to be Fail/Disconnected right away.

g. Try learn how whatsapp call on mobile phone work, if its work that way, our sip2wa system will work that way too. No Exception.

h. Can it work this way, can it work that way ? ... read g.

Stay tuned we will open a demo using public sip sample like sip.linphone.org and sip2sip.info, sip.antisip.com, we are looking people who want to invest this product to interconnect the existing openpbx service to add more interconnectivity like whatsapp.

**The demo is ready, if you get busy signal means the single line of demo is still being used by other user. Please wait. You will get a message reply saying that the line busy, this is a sample for hunting like inbound system. Receive inbound altough already online-call. **

Demo sip2wa using Public Sip Server, with common used codec that used by all this free sip server, which is G.711, as example as below :

sip2sip.info

You can register here http://www.sip2sip.info for Sip account and use SIP phone app like Linphone to dial "sip2wa" extension/number to try Sip to WhatsApp gateway.

and what about destination number of whatsapp account ? there is 2 way to call destination number :

a. Put your destination number of whatsapp you want to call to Display name / Caller Id of your accounts. Eg: "628979993336" as A caller id/ display name, as example see this below picture.

for example in Linphone software, the destination number is set on SIP Address as above, with inside quote.

b. After introduction you will be asked to put destination number via dial pad (Sending DTMF tones), then press # to finish input the number and dial the destination whatsapp number. Press the dialpad after introduction finished, not in ongoing introduction. Use international format with country code, and without "+" prefix, example: 628979993336, 62 is indonesian country code.

both way will dial the whatsapp destination number, until you hang up the call (in your sip session call) or destination whatsapp account hang up first.

sip.antisip.com

You can register here https://sip.antisip.com/service/ for sip free account, The destination of call of whatsapp number is the same as above, to put in Display name or Caller ID, or dial via DTMF tones while on call. You can dial account "sip2wa" as picture sample below, to start testing our Sip to WhatsApp gateway.

Voice Inbound testing

You can dial our whatsapp number account +22540230119 for testing our inbound routing, we will auto accept the call and will be forwarded to our Openpbx Dial plan for voice testing auto reply, this is a prof that we can use inbound too for showing voice reply and further action can be defined, example: forwarding to predefined extension on PBX system.

Our whatsapp inbound will be alive from now on, until we say otherwise

Messaging Inbound testing

For messaging inbound, we forward the private's message this number (as message inbound) to the first group its registered to, to that it will notice all member of group (eg. one department) there is incoming new message inbound to this number, so that member can follow up with quoted message or dial up from sip2whatsapp gateway pabx. You can message our whatsapp number for a test as a guest/customer, +22540230119

Conclusion

all the demo is using free sip server, if you have own server you can have dial plan as easy as possibe example, to specify easier international number or use prefix as dialplan pattern when calling to whatsapp number, contact us to have demo to your own server, and possibly own deployment.

This is a sample how things work and logs of the process.

(click for see the presentation in youtube)

F.A.Q.

1. I want to buy license unlimited license and possibly for continue the development.

Yes, we sell it license deployment at high price and efforts. Requirement and price you can ask on Admin WhatsApp Number +628979993336 for required hardware and specific requirement eg. Unlock Phone Bootloader/Custom ROM etc. Great for IP PABX interconnection to WhatsApp SIP. There is also rent option per month for no hardware options. Great for IP PABX interconnection to WhatsApp SIP.

2. What Account / SIM Card to use for best quality?

We Recommended you use old account to be best account live, at least 1 month account and has been doing normal thing an account usually do like messaging friend, receiving message or call and joining group, doing things you usually do. We dont recommended using new fresh account especially virtual sim that recycled over from people. And dont dial GSM number but dial WhatsApp number, you are using sip2whatsapp nor sip2gsm. You need to limit yourself how many unique call per hour/day as you need to.

3. Bann issue

Same as you use whatsapp normally. No modification on whatsapp

4. How many concurrent calls I can make for every line I rent ?

1 Line/Port you rent can call 1 concurrent calls, for inbound or outbound not silmultaniously.

a. Sound Quality not as good as usually ?

this is demo is limited to use G711, which most free sip server capable and only use 8k bit sample rate, which is not HD Audio. so WhatsApp call audio quality is somehow degraded on the way. If not using free sip server, we use G722 codec which is HD Audio, seem much better.

b. I always got busy signal when trying to dial the demo ?

this is demo is limited to single line, by free sip server and by our equipment as well. So please wait until our line is idle or available.

c. Is it possible to have our deployment in our office ?

Possibe, contact us for deployment with special good price. It need lots of requirement, including on-site deployment, devices set-up, and many more.

d. Do you have free testing 1 week or 2 week, just to make sure this is what we need ?

Yes, you can test our dedicated service using your own whatsapp account, we host it here. Then you can connect as sip trunk to your IP Pbx, as a test inbound/outbound.

e. Do you have non-cli solution perminute for outbound call only ?

We provide non-cli solution per minute, as SIP Trunk, price varies per country. Contact us for pricing.

f. What is the limitation talk time or number of call ?

Whatsapp never limit your call time, because its peer to peer call. so You can have unlimited talk time, longer is better. But as a service, whatsapp maybe limit total of call unique number to be dialed, so you can control yourself how many unique call per hour/day/etc ...

g. What is the limitation for Dedicated Services (unlimited call inbound/outbound).

We provide the dedicated services means the whatsapp number account is from the customer it self, it commonly used for inbound/outbound PABX. So customer responsible for the outgoing call number that will affect the account life. Example customer can put limitation only allow outgoing call to X after has minimal once, inbound call or message from X previously. If people report the whatsapp account number as it receiving call without previously saved the number, its affect its account lifecycle.

Downtime, when our internet connection is down, we also will experience the same service downtime. No Exception, best server for IP PBX Server nearby is Singapore. Keep it in mind.

on going

on going process .. is adding SIP to GSM Gateway from inside android (4G Lte), everything is there on AOSP just need little bit tweaking :) similar to this : https://www.pure-voip.com/ . sooner or later 2g/3g will be dead, and 4g still long ..

Need Investment to add premium feature :

• Multiple WhatsApp account on single devices, auto rotate between accounts on specific demand/requirement.
• WhatsApp business and WhatsApp private simulaniously, rotate etc.
• Monitoring multiple line /tenant.
• Profile Picture changes,
• Auto reply message on busy line
• Custom quick access
• Voice Broadcast using text to speech (custom language).

Contact us to exchange investment to deployment/lines.