All IP: QSC vs Telekom SIP Trunk
Trusted Advisor for IT & Telecommunications Sourcing
All IP in comparison QSC and Telekom SIP Trunk
Which solution is convincing in the corporate environment
With the switch-off of ISDN, All IP is becoming increasingly important. Instead of traditional telephone lines, communication now takes place via the Internet protocol. With their SIP trunk solutions, both Telekom and QSC offer modern alternatives for companies of all sizes.
In a nutshell:
- Connection: QSC allows any access technology including third-party carriers Telekom only own network
- Voice channels: QSC without limit depending on bandwidth Telekom up to 300 channels via VDSL
- Tariff models: QSC with flexible flat rates and cross-location usage
- Hardware: QSC supplies routers and Session Border Control including Telekom only as an option
- Availability: QSC scores with more access options, especially in rural areas
Conclusion:
Both providers offer reliable All IP solutions with high voice quality and stable performance. However, QSC impresses with greater flexibility, an open network structure and more favorable location coupling.
The question: Which SIP trunk is better suited to your communication strategy and infrastructure?
The buzzword All IP continues to haunt the telecommunications world. All IP emerged as an alternative with the impending ISDN switch-off. But what exactly is All IP? In simple terms, All IP means that all telecommunications are no longer transmitted via ISDN, but via IP protocol. The IP protocol is the standard Internet protocol. Solutions for this type of transmission have been around for some time, known as SIP trunks. With the imminent switch-off of ISDN, the topic is now being reopened and all-IP solutions or SIP trunks are making their way into the general public. With its SIP trunk product QSC IPfonie extended, QSC offers a well thought-out All IP solution. But what does it offer?
Telekom vs. QSC SIP Trunk
The most suitable comparison is between two providers. Here between Deutsche Telekom with DeutschlandLAN SIP Trunk and QSC with IPfonie extended.
Connection variants
Telekom currently only offers the option of connecting via ADSL/VDSL in its own network. The use of external networks is currently not permitted. QSC, on the other hand, offers its SIP trunk with connection via any access technology (ADSL, SDSL, leased line, radio relay, etc.). Furthermore, it is also possible to operate the product via third-party carriers. Telekom’s biggest shortcoming here is the lack of an option to operate the SIP trunk via symmetrical bandwidths.
Voice channels
The number of voice channels is limited at Telekom depending on the product. While DeutschlandLAN SIP Trunk allows up to 30 voice channels, you can connect up to 300 voice channels with the Pooling variant. However, these are dependent on the possible VDSL bandwidth. As the bandwidth is comparatively low in relation to a leased line, it will probably not be possible to realize all 300 channels. At QSC, on the other hand, there is no limit to the number of voice channels offered. The only limitation here is the bandwidth of the Internet line.
Tariffs
Both providers have a balanced tariff model. Telekom’s classic SIP trunk includes a Europe flat rate, while the pooling model offers a minutes package. QSC offers both. QSC IPfonie extended with the option of using a SIP trunk for several locations is interesting here. If you choose a flat rate model, this applies to all locations, which enables considerable cost savings.
End devices
While a WAN router must either be purchased or rented from Telekom, QSC provides a router with a secure voice port included when ordering IPfonie extended. Likewise, the E-SBC (Enterprise Session Border Control) function is only available from Telekom as an optional add-on package, but is already integrated at QSC.
Locations and phone numbers
If you have several locations or would like to obtain individual numbers in addition to a number block, QSC offers the best option. Telekom DeutschlandLAN SIP Trunk only offers the option of obtaining one number block per location. Individual numbers are currently not possible here!
Availability
Although Telekom has the best-developed network in Germany, with a SIP trunk it also depends on the possible bandwidth. However, the fact that only ADSL and VDSL can be used here severely restricts potential companies. At QSC, any connection technology is possible and it is also possible to use Internet lines from third-party carriers. This means that companies in rural areas can also make a better deal here.
Migration
Both providers have adapted to the requirements of companies that cannot or do not want to give up their classic TC system immediately. Both QSC IPfonie extended and DeutschlandLAN SIP Trunk offer migration solutions with S0 and S2M interfaces for connection to classic TC systems.
Comparison at a glance
| Criterion | Telekom DeutschlandLAN SIP Trunk | QSC IPfonie extended |
|---|---|---|
| Connection | Own network only via ADSL/VDSL, no third-party networks, no symmetrical bandwidths | Any access technology (ADSL, SDSL, leased line, radio relay), also via third-party carriers |
| Voice channels | Up to 30, up to 300 with pooling, depending on VDSL bandwidth | No fixed limit, only limited by the bandwidth of the internet line |
| Tariffs | Europe flat rate (classic) or minutes package (pooling) | Flat rate and minutes package, flat rate usable across locations |
| End devices | Buy or rent WAN router, E-SBC only as add-on package | Router with secure voice port and E-SBC included |
| Locations and phone numbers | One number block per location, no individual numbers | Several locations via one SIP trunk, number block and individual numbers |
| Availability | Best-developed network, but limited to ADSL/VDSL | More access options, advantage in rural areas |
| Migration | S0 and S2M interfaces for connecting classic PBX systems | S0 and S2M interfaces for connecting classic PBX systems |
Conclusion
With their SIP trunks, both providers offer All IP-capable solutions that offer companies a good alternative to ISDN TC systems in terms of quality and price/performance. QSC wins above all in the area of network opening, i.e. any access and provider can be used. QSC is also ahead in the tariff model. Above all because of the possibility of connecting several locations via a SIP trunk. Would you like an exact price and availability overview for your location? Use our SIP Trunk Online Check:
How SAVECALL supports your SIP trunk
SAVECALL compares the SIP trunk offers from Telekom, QSC and other providers vendor-neutral and, through a partner network of over 80 carriers, finds the solution that fits your communication infrastructure. From site analysis and price and SLA comparison to the migration of existing PBX systems, we support the entire switch to All IP.
Written by
Frank Frommknecht
Key Account Consultant, SAVECALL
Has supported companies for over 20 years in selecting and optimizing their connectivity solutions. His focus: making complex telecommunications understandable from the customer’s perspective and finding the right solution strategically.
Why
Telecom & IT sourcing. Worldwide. Carrier-independent.
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Sources
- Bundesnetzagentur: Migration to IP-based connections
- SAVECALL: SIP trunk solutions for companies
- SAVECALL: Voice and communication solutions
Frequently asked questions
All IP means that all telecommunications are no longer transmitted via ISDN but via the IP protocol, the standard internet protocol. With the switch-off of ISDN, All IP is becoming the standard for corporate communications. In practice it is implemented through so-called SIP trunks, which connect classic phone systems to the IP network. SAVECALL advises vendor-neutral on selecting the right All IP solution.
A SIP trunk is the collective connection of a phone system to the telephone network via the internet protocol. Instead of individual ISDN lines, several voice channels are bundled over a single IP connection. The number of simultaneous calls depends on the available bandwidth and the chosen tariff. SIP trunks are the technical basis of modern All IP telephony and can also be connected to existing PBX systems.
The Telekom DeutschlandLAN SIP Trunk runs only over its own network via ADSL/VDSL and is more limited in voice channels and phone numbers. QSC IPfonie extended allows any access technology including third-party carriers, offers voice channels without a fixed upper limit depending on bandwidth, cross-location flat rates, and router and E-SBC included. Overall QSC is more flexible and open, while Telekom benefits from its nationwide network coverage.
With the Telekom DeutschlandLAN SIP Trunk, up to 30 voice channels are possible depending on the product, and up to 300 with the pooling variant, depending on the available VDSL bandwidth. Because this bandwidth is limited, 300 channels are often not fully achievable in practice. With QSC there is no fixed upper limit; here only the bandwidth of the internet line limits the number of channels.
Yes, QSC IPfonie extended allows a SIP trunk to be used across several locations. If you choose a flat-rate model, it applies to all connected locations, which saves considerable costs. With the Telekom DeutschlandLAN SIP Trunk, only one number block per location is possible, and individual numbers are currently not offered. For companies with several sites, cross-location usage is therefore an important selection criterion.
Yes, both providers have migration solutions for companies that do not want to replace their classic PBX immediately. Both QSC IPfonie extended and the Telekom DeutschlandLAN SIP Trunk offer connections via S0 and S2M interfaces to existing systems. This allows a gradual switch to All IP without having to replace the existing phone infrastructure right away. SAVECALL supports the migration vendor-neutral.
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