Telstra Wholesale CTS Has No Replacement. Summit Does.
Telstra Wholesale scheduled its Number Hosting Call Termination Service (Wholesale CTS) to exit on 30 September 2026 and named no replacement product. Summit is a licensed carrier with wholesale call termination, number hosting and inbound origination over SIP, and a team that understands what your platform needs.
Wholesale voice
Wholesale termination, number hosting and origination over SIP
Overview
Telstra Wholesale CTS gave carriage service providers, VoIP and UC platforms, MSPs and MVNOs a way to host numbers and terminate calls across Telstra's network. Telstra Wholesale describes it as "a both-way call termination service delivered over Session Initiation Protocol Trunk (SIP Trunk) technology connecting your SIP based calling platform to Telstra's BroadWorks IP telephony calling platform."
| Telstra Wholesale CTS | Date |
|---|---|
| National stop sell | 30 September 2025 |
| Scheduled national exit | 30 September 2026 |
Telstra Wholesale's own exit page is direct about what comes next: "Telstra Wholesale do not have a replacement product for Wholesale CTS. Please contact your Service Manager for advice on arranging the porting out of your numbers before the exit date."
For many providers that meant a rushed port to whichever carrier could take the numbers in time. Others consolidated onto a single remaining supplier, giving up the second path that kept their platform resilient. If either describes your network today, it is worth a second look.
Summit Internet is an ACMA licensed carrier (Carrier Licence #388) that builds, owns and operates its own voice network. We supply wholesale Australian fixed and mobile termination, international termination, number hosting and DIDs, inbound origination and number porting, connected over SIP across the internet or by private interconnect. Summit is not affiliated with Telstra.
Key Benefits
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A Carrier, Not a Reseller of a Reseller
Your traffic lands on a network we own and run. When a route misbehaves, you are talking to the engineers who can see it and change it, not lodging a ticket that gets passed upstream.
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Termination Where Your Customers Call
Australian fixed and mobile termination for the bulk of your traffic, plus international termination for the rest, on one wholesale relationship and one invoice.
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Number Hosting and Inbound Origination
Host your DIDs with Summit and receive inbound calls to your platform, so numbers and termination sit with the same carrier rather than being split across suppliers.
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Porting Support for Number Ranges
Moving ranges off a retiring service is where providers lose time. We help plan and lodge ports for your number blocks so they arrive on Summit in an orderly sequence.
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A Second Path for Resilience
If losing CTS left you single-homed, Summit can sit alongside your existing carrier as a second termination route, so one supplier's bad day is not your platform's outage.
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Connect the Way Your Platform Does
SIP over the internet with IP authentication for a fast start, or a private interconnect or cross-connect where you want traffic off the public internet.
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People Who Know Wholesale Voice
You deal with a team that understands SIP signalling, CLI presentation, codecs and capacity planning, and can talk to your engineers in their language.
How It Works
- 1 Request wholesale rates
Request wholesale rates
Tell us about your platform, the destinations you terminate to, your monthly minutes and the numbers you host.
- 2 Technical discovery
Technical discovery
Our wholesale team talks through interconnect options, codecs, capacity, CLI requirements and your porting needs with your engineers.
- 3 Interconnect and testing
Interconnect and testing
We provision your SIP interconnect over the internet or a private connection, and test call flows in both directions before any live traffic moves.
- 4 Port and migrate traffic
Port and migrate traffic
We help sequence the porting of your number ranges and the shift of outbound traffic, so you can move in controlled stages rather than all at once.
- 5 Ongoing wholesale support
Ongoing wholesale support
You keep a direct line to our team for capacity changes, new ranges and route issues.
Features
Wholesale Voice Services
- Australian fixed termination
- : Termination to Australian geographic numbers.
- Australian mobile termination
- : Termination to Australian mobile numbers.
- International termination
- : Outbound routes to international destinations.
- Number hosting and DIDs
- : Australian numbers hosted on Summit for your platform.
- Inbound origination
- : Calls to your hosted numbers delivered to your platform over SIP.
- Number porting
- : Porting of number ranges onto Summit, planned with your team.
Interconnect Options
- SIP over the internet
- : IP-authenticated SIP interconnect for a fast start.
- Private interconnect
- : Private connection or cross-connect for traffic you want off the public internet.
- Staged migration
- : Move numbers and traffic in controlled stages, tested in both directions.
Who It Suits
- Carriage service providers
- : Retail voice providers needing termination and number hosting behind their own brand.
- VoIP, UC and contact centre platforms
- : SIP-based platforms that need Australian origination and termination.
- MSPs and telco resellers
- : Providers bundling voice into managed services.
- MVNOs
- : Mobile providers needing fixed-number hosting and termination alongside their mobile service.
Use Cases
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The UC Platform That Ported in a Hurry
A cloud UC provider moved its number ranges off CTS to the first carrier that could take them before the exit date. Now it wants a carrier it chose deliberately. Summit takes over number hosting and termination in stages, testing each range before traffic moves.
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The CSP That Went Single-Homed
A carriage service provider used to split traffic between CTS and a second supplier. With CTS gone, everything runs through one carrier. Summit becomes the second termination path, restoring the redundancy the provider had before.
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The MSP Adding Voice to Its Stack
IT Managed Service Providers (MSP)A managed service provider wants to offer hosted voice to its clients without building carrier relationships from scratch. Summit supplies hosted numbers, origination and termination over a single SIP interconnect.
Your situation not on this list? Tell us what you run or call 1300 049 749 and we will tell you honestly whether we can help.
Still single-homed after Telstra Wholesale CTS?
Add Summit as a second termination path, or move your numbers and traffic to a carrier you chose deliberately. Our wholesale team will come back with rates and an interconnect plan.
Why Choose Summit
- 01
A Licensed Carrier, in Business Since 2000
Summit has been in business since 2000 and holds ACMA Carrier Licence #388. Wholesale customers get a carrier, not an intermediary.
- 02
Our Own Voice Network
Calls ride infrastructure we build, own and operate, with points of presence in NEXTDC data centres.
- 03
Engineers Who Answer
Route problems get looked at by people who can see the network, not read from a script.
- 04
Straight Answers on Fit
If your traffic profile or destinations are not a good match for us, we will say so early rather than waste your engineers' time.
Other services businesses pair this with
Bundle them on one bill →Why Australian Businesses Choose Summit Internet
Great business and service provider. Highly recommended.
Nabil Salameh
last month
The Summit Team have always been a pleasure to work with; we highly recommend their services. Thank you for the continued support.
Paul Braithwaite
5 months ago
We recently moved our dental practice over to Summit for phone services, and the experience has been excellent from start to finish. The team has been responsive, professional, and incredibly helpful throughout the entire setup process. The transition was smooth, any issues were addressed promptly, and communication was always clear and efficient. Reliable phones and internet are essential for a busy practice like ours, and Summit has delivered exactly that. A special thank you to Michael for his patience and ongoing assistance during the transition. Highly recommend Summit to any business looking for reliable service and great customer support.Read more
Elli Darabi
5 months ago
The best service !!! Got issue fixed out by Greg ^^
白大倫
5 months ago
The whole team at Summit have been great from the initial onboarding to the rapid responses from Max when we need to make changes or additions to our services. Can't recommend them enough!
Aaron Klaver
5 months ago
As the I.T. Manager for Hydronic Systems Australia, Summit helps provide me and our companies with consistently stable Business Grade Internet, backed up by a dedicated Fixed Wireless Broadband connection. They also saved us a serious amount of money on our mobile phone bills. We have had no serious issues, and our business has been rock-solid under there great service. Highly Recommended.Read more
James Paterson
6 months ago
Prompt and efficient service. Highly recommend
Elliot Bell
6 months ago
We now use Summit across our real estate network. Great family business, reliable and their attention to detail is outstanding. Highly recommend.
Ryan Bell
6 months ago
As a reseller, we primarily work with Summit’s 4G services and have been very impressed. The plans are affordable, flexible, and well suited to our customers—especially for internet failover solutions. The sales and support teams are responsive and genuinely helpful, which is why we’re proud to partner with Summit Internet. We happily recommend them.Read more
Mal Skinner
6 months ago
After working with another ISP for several months to deliver a critical internet service for a major international sporting event, we were ultimately advised that the required upgrade was unlikely to be completed prior to event week. This left us facing a significant risk to service delivery. After exhausting all other options (and a few sleepless nights) we came across Summit Internet. From the initial conversation, Allan immediately understood the severity of the situation and quickly engaged his technical delivery team. Michael “Radar” was on site within days to assess and finalise a solution. Despite challenging conditions, including large trees and other obstructions, he worked tirelessly to design and implement an alternative approach. Leveraging an adjacent building, a temporary NBN connection, and a wireless link into the comms room, the solution was delivered within 24 hours of the initial site visit. Not only was the outcome faster than expected, but it was also more cost effective and delivered higher speeds than originally promised by the previous ISP. Over the course of the event, the service handled terabytes of data and supported hundreds of concurrent users without a single speed or performance issue. I cannot thank Summit Internet, particularly Allan and Radar enough for their exceptional service, technical expertise, and commitment to delivering under pressure. Highly recommended.Read more
Adam Hastie
6 months ago
Fausto and the staff at Summit are amazing. We have had nothing but fantastic service from start up to problem solving issues. The system is easy to use. Would highly recommend this service provider.
Jo Bodhankar
6 months ago
Summit internet recently set my small business up with a local land line number and a soft phone that runs off an app on my mobile - getting my personal phone number off the internet and being able to distinguish between business and personal calls is a game changer. Whole process took less than a week, and is super cost effective. Highly recommend.Read more
Alex Holly
8 months ago
Reviews from Google. Read all reviews on Google
Frequently asked questions
What was Telstra Wholesale CTS?
When does Telstra Wholesale CTS exit?
Is there a Telstra replacement for Wholesale CTS?
What does Summit offer instead?
How do we connect to Summit?
Can Summit be a second carrier alongside our existing one?
Can you take over our number ranges?
How are wholesale rates set?
Is Summit affiliated with Telstra?
Find a carrier you chose, not one you rushed to.
Tell us about your platform and traffic and our wholesale team will come back with rates and an interconnect plan.
Call 1300 049 749 · Mon-Fri 9AM-5PM AEST