Vobiz provisions two categories of DID (Direct Inward Dialing) numbers for outbound voice calling only - the 140 series and the 160 series. Both are provided against a fixed timeline, a common set of mandatory documents, and a minimum channel allocation. The end-to-end registration workflow differs between the two series and is detailed below.
Outbound only. Neither 140 nor 160 DIDs are enabled for receiving inbound calls. If you need inbound, Vobiz provides standard DID numbers that can be paired with your 140 / 160 setup.
1. Key Requirements at a Glance
PE Certificate and LOI are client-arranged prerequisites. The PE (Principal Entity) Certificate must be obtained from either TATA Teleservices or Airtel, and an LOI (Letter of Intent) must be signed by the Principal Entity. Both are mandatory for procuring either a 140 or a 160 DID and should be arranged before initiating the process. Both series also carry a 12-month lock-in period from the date of allocation.
2. Terminology
The DLT portal and the carrier use specific terms. This is what each one means in the context of your provisioning request.
3. Process for 140 DID
The 140 series follows a DLT header registration route via your Telemarketer (TM) ID.
Principal Entity signs the LOI
The Principal Entity (PE) signs an LOI (Letter of Intent) authorising procurement of the 140 DID. This is mandatory before the number can be procured.
Register the header on the DLT portal
The header - that is, the DID number - is registered on the DLT portal using your Telemarketer (TM) ID.
Principal Entity approves the header
The Principal Entity reviews and approves the header registration from their side.
Carrier approval
Once PE approval is confirmed, the header is submitted for approval at the carrier (TATA / Airtel) end.
DID allocated to your Vobiz account
Once both the PE approval and the carrier approval are complete, the 140 DID is allocated to your Vobiz account.
Start outbound calling
You can now begin making outbound calls using the allocated 140 number.
Activation flow - 140
Sign LOI → Register header via TM ID → PE approves → Carrier approves → DID allocated → Outbound calling
4. Process for 160 DID
The 160 series follows an NOC-based DLT registration route. You file the registration yourself on your own DLT portal, using an NOC issued by Vobiz.
Principal Entity signs the LOI
The Principal Entity (PE) signs an LOI (Letter of Intent) authorising procurement of the 160 DID. This is mandatory before the number can be procured.
Vobiz issues the NOC
Vobiz issues an NOC (No Objection Certificate) confirming that the header - the DID number - is being provided specifically to your Principal Entity.
Register the header on your DLT portal
Log in to your own DLT portal and register the header, uploading the NOC provided by Vobiz.
Upload your company document
Upload your company’s MOA (Memorandum of Association) or GST certificate to establish the nature of your business.
File under the 'Voice' category
The registration must be filed under the Voice category, since the header will be used for voice calling.
DID allocated to your Vobiz account
Once the DLT registration and approvals are complete, the 160 DID is allocated to your Vobiz account and outbound calling can begin.
Activation flow - 160
Sign LOI → Vobiz issues NOC → Register header + upload NOC → Upload MOA / GST → File under Voice → DID allocated → Outbound calling
The exact sequence inside the DLT portal for Step 3 above.
Log in to your PE Registration Portal
Use your registered Principal Entity credentials.
Open the Voice Header column
On the top menu row, locate the Voice Header column (2nd column) and click it. This is what files the registration under the Voice category.
Select "Voice Header Registration by PE"
Choose Voice Header Registration by PE from the options shown.
Enter the TM ID
Enter the TM ID (Telemarketer ID). This is provided in the NOC shared with you.
Enter the Header CLI
Enter the Header CLI - the DID number itself. This is also provided in the NOC.
Set the use case
In the Use Case / Remarks field, enter Transactional for 160 numbers.
Upload your company proof
Upload your MOA or GST certificate, whichever reflects your business category.
Complete the remarks field
In the next remarks field, enter Approved.
Upload the NOC
Upload the NOC issued by Vobiz.
Submit
Click Submit to file the registration.
Share the Application / URL Number with Vobiz
An Application / URL Number is generated on submission. Screenshot it and share it with the Vobiz onboarding team so carrier approval can be coordinated.
Field reference
5. Which Route Applies to You
6. How This Differs from DLT Entity Registration
DLT has two distinct layers. This page is the per-number layer - it assumes your organisation is already registered.
7. Support
Reminder - both 140 and 160 DIDs are strictly for outbound calling. They cannot be used to receive inbound calls.
For questions on document formats, LOI or NOC issuance, or DLT portal registration support, contact the Vobiz onboarding team at support@vobiz.ai.