Wholesale voice

Wholesale voice termination with quality stated up front

CLI, non-CLI and TDM international termination for carriers, VoIP operators and resellers, with per-destination quality profiles, SIP interconnect and honest labelling of what each route actually is.

CLI, NCLI and TDM profiles labelled per destination
SIP interconnect with IP authentication
ASR, ACD and PDD visible in your own CDRs

Request rates and a test trunk See the specification SIP interconnect

At a glance SIP over IP, static IP authentication or digest G.711 A-law and µ-law, G.729 CLI (premium), NCLI (cost), TDM where available Pass-through where the destination permits it

Specification

The numbers, up front

Destination-level coverage

Connection: SIP over IP, static IP authentication or digest
Codecs: G.711 A-law and µ-law, G.729
Route profiles: CLI (premium), NCLI (cost), TDM where available
CLI handling: Pass-through where the destination permits it
Reporting: ASR, ACD and PDD per destination in exportable CDRs
Capacity: Channel counts agreed per account
Best for: Carriers, VoIP operators and resellers buying minutes
Typical volume: Agreed per account, tiered by destination

What you get

What you are buying when you buy termination

Every wholesale supplier quotes a rate. Very few will tell you, in writing, which of their destinations are CLI, which are grey, and what happens to your ASR at peak.

Route profiles labelled honestly

CLI, NCLI and TDM are named per destination. You will never buy a route described as premium and discover it strips CLI in production.

Quality metrics you can verify

ASR, ACD and PDD are in your CDRs, per destination, so you can hold the numbers against what was quoted.

Standby routes per destination

Quality degradation triggers a reroute to a qualified alternative rather than an apology after the fact.

Straightforward interop

SIP with IP authentication, codec negotiation on G.711 and G.729, and an engineer on the call for the first interop test.

Peak-hour behaviour discussed before you buy

Most quality complaints are peak-hour complaints. We will tell you which destinations tighten and by roughly how much.

Flexible commercials

Prepaid or postpaid, tiered by destination and volume, reviewed on a cadence you choose.

Wholesale voice is a labelling problem before it is a pricing problem

Two rate sheets for the same destination, twenty per cent apart, are usually describing different products. The cheaper one is frequently a non-CLI route, a route with heavy peak-hour contention, or a route that will be re-sold under you three more times before it terminates. None of that is dishonest in itself. Selling it as premium is.

We label every destination with its route profile, CLI, NCLI or TDM, on the rate sheet, and we publish ASR, ACD and PDD into your CDRs so the label can be checked.

The metrics worth arguing about

ASR (answer-seizure ratio). The proportion of attempts that are answered. Low ASR on a destination usually means route quality or a mismatch between your traffic and the route profile.
ACD (average call duration). Short average duration on a route that should carry conversational traffic is a strong signal of audio problems users are hanging up on.
PDD (post-dial delay). The pause between dialling and ringing. Long PDD makes users hang up before the call is even attempted, and it is the metric most often left out of a quality discussion.

Interop, then minutes

Every new trunk starts with an interop session with an engineer on the call, not a credentials email. Once signalling and codecs are agreed, test minutes run on the same trunk production will use.

Use cases

Who buys these routes

Carriers and licensed operators

Incremental capacity into destinations where your own interconnects are constrained.

VoIP platforms and softswitch operators

Wholesale supply behind a retail or hosted PBX product.

Contact centres and outbound dialling

Predictable CLI behaviour and PDD for high-volume outbound campaigns.

Calling-card and retail VoIP resellers

Cost-profile routes for price-sensitive retail traffic, labelled as such.

Enterprises with international voice spend

Direct wholesale supply instead of a marked-up carrier contract.

Aggregators balancing supplier mixes

A second or third supplier for destinations where you need alternatives on hand.

How it works

From interop to live minutes

Share your destination mix

Destinations, minutes, current ASR and ACD, and what you pay. That is enough to say whether we can improve on it.
Receive rates with route profiles

A rate sheet where each destination carries its route type, not just a number.
Interop and test

SIP interop with an engineer on the call, then live test minutes on the trunk you will use in production.
Scale and review

Ramp minutes, with a scheduled quality review and a rate review on the cadence you prefer.

Connect

How to connect Voice termination

Every method reaches the same routes, the same balance and the same reporting. Pick the one that suits how your platform is built.

Compare all connection methods

SMPP v3.4 bind

SMPP v3.4

An SMPP v3.4 bind is the standard way to move A2P SMS at volume. Transmitter, receiver or transceiver, with real…

Set up SMPP v3.4 bind

HTTP REST API

HTTPS / JSON

A straightforward HTTP REST API in JSON, for teams that would rather not run a persistent SMPP session. Same routes,…

Set up HTTP REST API

SIP interconnect

SIP / RTP

A SIP interconnect for voice termination, Voice OTP and TTS, with an engineer on the call for interop.

Set up SIP interconnect

IP authentication

IP allow-list

IP authentication instead of credentials: authenticate by source address, for platforms with fixed egress IPs.

Set up IP authentication

Coverage

Destination availability

Search for the destinations you care about. Anything not listed is usually available on request, capacity is added weekly.

Route availability by destination
Destination	Dial / MCC	A2P SMS	Voice OTP	TTS voice	Termination
Bangladesh	+880 · 470	Live	Live	Live	Live
India	+91 · 404 / 405	Live	Live	On request	On request
Pakistan	+92 · 410	Live	Live	On request	Live
Nepal	+977 · 429	On request	Live	On request	On request
Sri Lanka	+94 · 413	On request	Live	On request	On request
Indonesia	+62 · 510	Live	On request	On request	On request
Philippines	+63 · 515	Live	On request	On request	On request
Vietnam	+84 · 452	On request	On request	No	On request
Malaysia	+60 · 502	Live	On request	On request	On request
United Arab Emirates	+971 · 424	Live	On request	No	On request
Saudi Arabia	+966 · 420	Live	On request	No	On request
Oman	+968 · 422	On request	On request	No	On request
Qatar	+974 · 427	On request	On request	No	On request
Egypt	+20 · 602	On request	On request	On request	On request
Nigeria	+234 · 621	Live	On request	Live	On request
Kenya	+254 · 639	On request	On request	On request	On request
South Africa	+27 · 655	On request	On request	No	On request
Turkey	+90 · 286	On request	On request	No	On request
United Kingdom	+44 · 234	Live	On request	No	On request
United States	+1 · 310	On request	On request	No	On request

See 14 more destinations Show fewer

Why SisBird

How we differ from a rate-sheet supplier

We would rather lose a destination than mislabel one

If we cannot supply a destination at the quality profile you need, we will say so. A wholesale relationship that survives is built on the destinations you did not buy.

Quality reviews are scheduled, not reactive

A standing review on your top destinations, with the numbers, before they become a complaint.

One supplier across voice and messaging

Termination, TTS, Voice OTP and A2P SMS on one commercial relationship and one balance.

Who runs these interconnects

Next step

Get a rate sheet with the route type against every destination

Send us your destination mix and current ASR and ACD. We will come back with rates, the route profile per destination, and a test trunk so you can compare like for like.

1
You send the brief Destinations, monthly volume and the traffic type. Two lines is enough.
2
A routing engineer replies A costed plan with the route type stated per destination, usually within one business day.
3
You test on funded credit Same interconnects production runs on. No minimum term and no setup fee.

Or reach the routing team directly

Request a test route

For Voice termination. We reply within one business day.

Reply within one business day Free test credits on approval No spam, no reselling of your data

FAQ

Wholesale voice questions

What is the difference between CLI and NCLI routes?

A CLI route passes the calling line identity through to the called party and generally runs on higher-quality interconnects. An NCLI (non-CLI) route does not present a valid caller ID and is usually cheaper. Neither is inherently wrong, what matters is that you know which one you are buying, because CLI presentation affects answer rates and, in some markets, legality.

What is TDM termination and when do I still need it?

TDM termination uses traditional circuit-switched paths rather than IP end to end. It is more expensive and less common, but for some destinations and some enterprise customers it remains the most consistent option, particularly for fax and legacy PBX traffic.

How do you connect?

SIP over IP with static IP authentication, or digest authentication where a fixed IP is not practical. Codec negotiation supports G.711 A-law and µ-law and G.729.

What ASR and ACD should I expect?

That depends entirely on the destination, the time of day and the nature of your traffic, so any supplier quoting a single global figure is guessing. We quote expectations per destination against your own traffic profile and then publish the actuals in your CDRs.

Can I keep my own CLI?

On destinations that permit CLI pass-through, yes. Some markets require the CLI to be registered or in local format, and some prohibit foreign CLI on certain traffic. We record the rule per destination.

Do you offer both prepaid and postpaid?

Yes. New accounts usually start prepaid, and postpaid terms are available once a payment history exists.

Read every wholesale routing question we are asked

Also available