Glossary · Calling and dialers

Cloud telephony

Cloud telephony: Phone service delivered over the internet rather than through a SIM, usually with rented virtual numbers, call routing, IVR menus and per-minute billing.

Definitions checked 4 September 2026.

Cloud telephony moves the phone line into software. Calls travel over the internet to a provider that connects them to the ordinary phone network, which makes possible everything a contact centre needs: routing to whoever is free, hold queues, IVR menus, recording at the network level and dialing many lines at once. The bill is typically a number rental plus a per-minute charge.

What it buys is control over the call path. What it costs, besides money, is the number the customer sees. Virtual numbers are shared infrastructure and are widely treated as untrusted, so answer rates on them in India are noticeably lower than on ordinary mobile numbers, and the effect has strengthened as caller-ID apps have become common.

The decision is therefore about size and about the kind of calling. A business running inbound support queues, or fifty agents on cold outbound, genuinely needs what cloud telephony provides. A team of six calling their own enquiries generally does not, and pays a per-minute bill and a lower pickup rate for features it will not open. That is the boundary Telodial draws on its own comparison pages.

Cloud telephony: common questions

Do I need cloud telephony for a small calling team?

Usually not. Below roughly fifty callers working their own enquiries, SIM based calling costs less and gets answered more often.

Can I use both?

Some platforms offer both routes. It is worth asking what each one costs per minute and which number the customer actually sees on each.

What you gain and lose by moving calls off the handset

Updated 4 June 2026

The questions people ask when comparing the two routes

Is cloud telephony better than calling from a SIM?

It is better at different things. Cloud gives you routing, IVR menus, recording, several lines per agent and numbers in markets where you have no office. It costs you the thing that decides answer rates in India, which is a familiar mobile number on the customer screen, and it adds a per-minute bill.

Why do cloud calls get answered less in India?

Because the number is unfamiliar and often reads as a call centre before it is picked up. A decade of unwanted promotional calling taught people to let those ring. It is a learned habit rather than anything technical, which is also why it does not apply equally in every market.

What does cloud telephony actually cost?

Two things a SIM does not: rental for each number and a per-minute charge for the calls. Whether that is expensive depends entirely on your volume and margin, but it should be priced as part of the platform rather than discovered later on an invoice.

Can I use both?

Some vendors offer both routes in one product, which suits a business with a domestic calling team and one desk that needs numbers elsewhere. It is a genuine reason to choose a tool that does both, and Telodial is not one of them: we do SIM calling only.

The facts worth lifting

Cloud telephony carries calls over the internet from rented virtual numbers rather than from the SIM in a handset.
It enables routing, IVR menus, call recording and multiple lines per agent, none of which a SIM-based app can offer.
It adds number rental and per-minute charges that SIM calling does not have.
In India, an unfamiliar virtual number is answered noticeably less often than an ordinary mobile number.
Predictive dialing requires cloud telephony, because it needs more open lines than agents.

The two routes, side by side

The two routes, side by side
	SIM based	Cloud telephony
What the customer sees	An ordinary mobile number	A rented virtual number
Cost of the call itself	Your existing mobile plan	Per minute, plus number rental
Call recording	Not possible on Android apps	Yes, the platform carries the audio
Lines per agent	One, because one SIM	Several, which is what predictive needs
Numbers in other countries	No	Yes

Neither column is the better product. They are answers to different questions about who you call and how many of you there are.

What this comparison rests on

The capability differences described here follow from how each route works rather than from any vendor claim.
The answer-rate difference is a pattern consistently reported by Indian calling teams.

What this page does not claim

We sell a SIM-based tool and do not offer cloud telephony, so the column listing what cloud does better is the one to weigh most carefully.
We have not run a controlled answer-rate test between the two routes on the same list.

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