Yeastar TG400 4G LTE VoIP Gateway in Dubai, UAE
The TG400 is a four-channel gateway that links 4G LTE cellular voice trunks with SIP-based business phone systems. It is designed for organizations that need mobile trunking, controlled call routing, SMS capability, or a cellular path alongside their existing IP telephony environment.
The most important buying detail is not simply the model name: Yeastar states that LTE band support depends on the cellular module type. UAE buyers should confirm the intended mobile operator, supported bands, SIM policy, number of active channels, PBX integration method, and route design before the gateway is ordered.
SIP & IAX2
Web-Based Management
A practical bridge between cellular calling and IP telephony
The Yeastar TG400 gives a business phone environment four cellular voice channels that can be presented to a VoIP system for inbound and outbound calling. In straightforward terms, it converts the cellular side of a communication path into a form that a SIP-based PBX or softswitch can use, and it also sends VoIP-originated calls back out through the selected mobile trunks. That makes the gateway relevant where mobile network access is part of the voice design rather than an isolated mobile-phone function.
A common requirement is to add mobile trunks to an existing IP PBX without replacing the PBX. Another is to create an alternate calling path when the fixed-line service is unavailable or unsuitable for a particular site. The TG400 can also serve environments where call-routing rules need to direct certain dial patterns, carriers, users, or destinations through selected cellular channels. Yeastar provides incoming and outgoing routing functions, mobile port groups, VoIP trunk groups, carrier selection, call-duration controls, call-detail records, and status information that help an administrator manage this role from one gateway.
The product is not limited to voice. The platform includes SMS sending and receiving, bulk SMS tools, an SMS center, USSD functions, and an open interface for SMS and USSD integration. These capabilities can be useful for organizations that need a managed cellular messaging path alongside telephony, although every project should still confirm operator rules and application requirements before deployment.
For UAE buyers, cellular compatibility deserves special attention. Yeastar specifies that the supported LTE band depends on the module type, and its cellular guidance advises buyers to check frequencies when an operator is not explicitly listed. That means a procurement team should not assume that every TG400 hardware variation will match every SIM or network automatically. The intended operator, voice-over-LTE requirement, local band support, and the exact network version ordered should be reviewed as part of product selection.
FourTeck can help translate those technical choices into a purchasing requirement. A useful inquiry should include the phone-system platform, number of required cellular channels, SIM operators, expected call direction, routing requirements, SMS needs, installation location, quantity, and delivery destination. That information helps identify whether the TG400 is the right four-channel size or whether a smaller or larger TG model should be considered.
Key business benefits of a four-channel cellular gateway
The main value of the TG400 comes from giving the communications team controlled access to four cellular channels without separating those channels from the IP phone system. The benefits below focus on what that means operationally rather than simply repeating technical features.
Bring cellular routes into the PBX dial plan
Instead of asking users to manage separate mobile phones for business routes, the gateway can expose cellular trunks to the organization’s VoIP environment. Administrators can build routing logic around the gateway and keep extension users working through the normal phone-system interface. This is especially useful when the business wants mobile-network calling to behave like a managed trunk rather than an unmanaged handset.
More routing headroom than a single-SIM design
Four cellular channels allow a business to distribute calling across multiple SIMs, carriers, routes, or departments according to the deployment plan. The exact way those channels are used depends on PBX rules and operator service, but the hardware gives more flexibility than a one- or two-channel gateway for sites with regular mobile traffic.
Add a cellular path to the communications design
Yeastar positions the TG family as a possible fallback when landline connectivity is unavailable. For a buyer, the practical point is redundancy: a cellular voice route can provide another option when a fixed service is disrupted, provided the PBX, routes, SIM service, signal strength, power, and cellular coverage are all planned correctly.
Use the same gateway for SMS functions
The TG platform supports sending and receiving SMS, bulk SMS, an SMS center, USSD, and an open interface for messaging functions. This can simplify projects that need a controlled SIM-based messaging path, but the business should confirm operator policies, message volumes, application integration needs, and any regulatory requirements before relying on it.
Keep routing, status, records and network settings in one web interface
A web-based management interface gives administrators one place to review mobile modules, VoIP trunks, routes, logs, call records, network settings, firewall functions, VLANs and related gateway controls. This matters when the device is part of an operational phone system: troubleshooting becomes easier when the team can see trunk state and gateway configuration without treating each SIM path as a separate consumer device.
Fit into managed business networks
Support for static addressing, DHCP, VLAN, QoS, firewall functions, OpenVPN, static routing, DDNS and NAT traversal gives network teams several ways to place the gateway within an existing LAN design. The final network policy should be reviewed with the PBX and security requirements rather than using default settings without assessment.
Capabilities that matter in a real deployment
The Yeastar TG400 is most useful when the buyer treats it as part of a complete communications design: cellular modules and SIMs on one side, Ethernet and SIP integration on the other, with routing rules connecting the two. Its four-channel format sits between compact two-channel models and larger eight- or sixteen-channel gateways, giving businesses room for multiple mobile trunks without moving immediately to a larger chassis.
Voice processing includes SIP and IAX2 support, multiple transport options including UDP, TCP, TLS and SRTP, common codecs, DTMF handling and G.168 echo cancellation. These are useful interoperability building blocks, but compatibility should still be tested against the specific PBX, SIP settings, codec policy and security configuration used by the organization.
On the cellular side, the gateway supports carrier selection, VoLTE when the carrier supports it, SMS functions, USSD, PIN management, caller ID controls, talk-time alerts and module grouping. The user guide also documents hot-plugging SIM cards, which can simplify operational handling. A buyer should still plan maintenance carefully because changing SIMs can affect route behavior, authentication, caller identity and operator services.
Yeastar TG400 technical specifications
The table below uses current Yeastar product-family documentation. Cellular band compatibility is configuration dependent and should be checked against the selected module and UAE operator before purchase.
| Specification | TG400 detail | Buyer note |
|---|---|---|
| Brand / Model | Yeastar TG400 | TG Series VoIP 4G gateway |
| Cellular channels | 4 × 4G channels | Network type depends on what is ordered |
| 4G LTE bands | Depends on module type | Confirm carrier frequencies before ordering |
| VoIP protocols | SIP, IAX2 | Verify PBX interconnection method |
| Transport | UDP, TCP, TLS, SRTP | Use settings consistent with PBX security policy |
| Voice codecs | G.711 (alaw/ulaw), G.722, G.726, G.729A, GSM, ADPCM, Speex | Codec choice should match the PBX and bandwidth plan |
| DTMF | RFC2833, SIP INFO, In-band | Confirm with IVR and trunk requirements |
| Echo cancellation | ITU-T G.168 LEC | Built into voice processing capability |
| Ethernet | 1 × 10/100 Mbps Ethernet interface | Plan LAN addressing and switch port |
| Network features | DHCP, DDNS, firewall, OpenVPN, static IP, QoS, static route, VLAN | Coordinate with network administrator |
| NAT traversal | Static NAT, STUN | Deployment dependent |
| Messaging | SMS send/receive, bulk SMS, SMS center, USSD, API for SMS/USSD | Carrier and application policies may apply |
| Antenna splitter | 4-in-1 antenna splitter support | Confirm supplied/required antenna arrangement |
| Dimensions | 213 × 160 × 44 mm | Plan shelf or rack placement |
| Power supply | AC 100–240V | Use supplied power cord and correct site power |
| Operating range | 0°C to 40°C | Keep within documented environmental limits |
| Humidity | 10–90% non-condensing | Suitable installation environment required |
When choosing the final configuration, start with the cellular side. Confirm the UAE operator or operators, the LTE bands they use for the required service, whether Voice over LTE is needed, and how many simultaneous cellular calls are expected. Then check the PBX side: SIP peer trunk or registration mode, codec policy, DTMF method, addressing, firewall rules, VLAN design and inbound/outbound route logic. If the gateway will also handle SMS, define message workflows and any external application integration. Finally, confirm physical placement, antenna location, signal quality, power, grounding and access to the local network. A technically correct gateway can still perform poorly if antenna placement, SIM service or routing policy is not planned carefully, so these elements should be part of the purchasing conversation rather than left until installation day.
How to specify the right TG400 requirement
A four-channel gateway is only useful when its cellular, network and PBX assumptions match the real deployment. These questions help a buyer turn a model request into a configuration that can be reviewed properly.
Which cellular operator and LTE bands will be used?
This is the highest-risk selection question because Yeastar states that LTE support depends on module type. Share the intended UAE operator or operators and the required service so the cellular module can be checked before purchase.
How many simultaneous mobile calls are expected?
TG400 provides four cellular channels. If normal or peak call traffic regularly exceeds that number, the project may need a larger gateway or a different trunk design. If only one or two channels are needed, a smaller TG model may be more appropriate.
Which PBX or softswitch will connect to the gateway?
Provide the phone-system brand, edition and deployment model. Yeastar publishes TG400 integration examples for its P-Series platforms using SIP peer trunks, but the exact trunk type, addressing, routes and security settings must match the actual system.
What should happen to inbound and outbound calls?
Define which extensions or departments can use the cellular trunks, whether calls should prefer a particular SIM or carrier, how incoming mobile calls should be delivered, and what fallback behavior is expected. Route design often matters more than the hardware itself.
Will SMS, USSD or API access be part of the project?
If messaging is needed, identify who will send and receive messages, expected volume, whether a web interface is enough, and whether software integration is required. Carrier terms and application requirements should be reviewed before the workflow is designed.
Where will the gateway and antennas be installed?
Good cellular signal, correct power, grounding, ventilation, Ethernet connectivity and administrative access all affect the installation. Share the site type and rack or desktop preference so practical accessories and placement can be considered.
For a useful FourTeck quote: send the model, preferred cellular operator, number of channels, PBX platform, quantity, SMS requirement, delivery location, target date, installation expectations and any warranty preference. If some details are unknown, FourTeck can help identify the questions that need to be answered before the order is finalized.
Where a four-channel 4G VoIP gateway makes practical sense
The TG400 is not a general-purpose 4G router. Its role is cellular voice and messaging integration with VoIP. The strongest use cases are therefore environments where mobile trunks need to become part of a managed business communications system.
Add cellular trunks to an existing IP PBX
An office may already have extensions, auto attendants, call groups and routing rules on its IP PBX but still need mobile-network calling. TG400 can sit between the PBX and cellular network so mobile trunks can be presented to the phone system. The PBX remains the user-facing communications platform, while the gateway handles the cellular interface. This is useful for branches, service teams and organizations that want SIM-based routes without replacing their existing telephony platform.
Cellular backup path
Where a business wants an alternate voice route, the gateway can provide cellular connectivity that is incorporated into the PBX routing strategy. It should be treated as one element in a continuity plan that also considers power, signal, SIM service and route failover behavior.
Multi-SIM routing
Four channels can be useful when the business wants several cellular trunks for departments, carriers, call types or route policies. The exact arrangement depends on the PBX dial plan and operator services, but the gateway provides the channel capacity and trunk grouping controls needed for a structured design.
SMS operations
Businesses that need SIM-based SMS can use the gateway’s web messaging functions or review API-based workflows. This may suit notifications, service communication or controlled messaging projects, provided the business confirms local rules, carrier policies and its own application requirements.
Temporary or branch locations
A site that needs business calling but has limited fixed-line options may use cellular trunks as part of its voice design. The gateway still needs LAN connectivity to the PBX or SIP environment, and signal quality must be suitable where the antennas are installed.
Small phone environment using TG as SIP registrar
Yeastar documents a use case in which TG can act as a SIP registrar for IP phones, allowing a small environment with only a handful of users to make and receive calls through cellular trunks without a separate IP PBX. This is a specialized deployment choice rather than a universal recommendation. Buyers should compare the simplicity of a gateway-plus-phones design with the feature needs, call routing, administration and future growth that a full PBX would provide.
Yeastar TG400 Cellular Trunking and Call Routing
The core job of the gateway is to connect cellular channels to the VoIP environment and give administrators control over how calls move between them. Yeastar supports incoming and outgoing routing rules, mobile port groups and VoIP trunk groups, which means the device can participate in a structured dial plan rather than simply forwarding every call in the same way.
For outbound traffic, the design can choose which calls are sent through the gateway and which cellular trunk is used. For inbound traffic, calls arriving on SIM-based trunks can be passed to the connected PBX and then delivered to extensions, queues or other destinations according to the PBX design. Yeastar’s P-Series integration examples demonstrate this approach by using SIP peer trunks and separate inbound and outbound routing steps.
For the buyer, the question is not whether routing exists; it is how many routing rules are needed and who owns them. A clean deployment usually documents number patterns, permitted extensions, preferred carriers, failover behavior, caller ID expectations and any limits on call duration. That information should be prepared before installation so the gateway can be configured as part of the phone system instead of becoming an isolated device with ad hoc rules.
Yeastar TG400 SIP Integration and Network Control
A cellular gateway only becomes useful to a business phone system when the IP side is predictable and manageable. TG400 supports SIP and IAX2, with UDP, TCP, TLS and SRTP transport options, and includes common network functions such as static addressing, DHCP, VLAN, QoS, firewall controls, OpenVPN, DDNS, static routing and NAT traversal. These features give the network team options for fitting the gateway into a managed environment, but they do not remove the need for a documented network design.
Yeastar’s current integration material provides a clear example for P-Series Software and Cloud editions: the PBX and TG400 are connected with SIP peer trunks, and call routes then determine which traffic uses the extended 4G trunks. That example is useful because it shows that the gateway is not simply plugged in and discovered automatically; IP addresses, SIP ports, trunk definitions and routing policies are part of the deployment.
In a business network, administrators should decide where the device sits, whether it belongs in a voice VLAN, which management hosts can reach its web interface, which SIP endpoints are allowed to connect, whether encryption is required, how DNS and time services are handled, and how configuration backups will be stored. The goal is to make the gateway an intentional part of the communications network with clear ownership and controlled access.
Yeastar TG400 SMS, USSD and SIM Administration
The messaging and SIM management functions can be as important as voice for some deployments. TG Series supports SMS sending and receiving, bulk SMS, an SMS center, USSD, PIN modification, carrier selection, caller ID controls, talk-time alarms and an open interface for SMS and USSD. The user guide also documents hot-plugging SIM cards. Together, these tools let an administrator manage several cellular channels from the gateway instead of treating each SIM as a standalone device.
For business buyers, however, messaging capability should be scoped before purchase. A team that only needs occasional administrative SMS has different requirements from an application that expects programmatic message handling. Likewise, a project using USSD for balance checks or service interactions should confirm the operator’s supported functions. The gateway provides tools, but the carrier and application determine what can actually be done in the final environment.
Decision checklist for SIM and messaging use
- Confirm whether each channel needs its own SIM and which operator is assigned to it.
- Check LTE band and VoLTE compatibility for the exact module and carrier.
- Define whether SMS is manual, bulk, inbound, outbound or API-driven.
- Clarify whether USSD, PIN management or talk-time monitoring is required.
- Document who is allowed to change SIMs or cellular settings.
- Plan caller identity, routing and failover behavior when a SIM is replaced or unavailable.
This planning also helps avoid a common procurement mistake: buying a four-channel gateway because four SIMs are desired without confirming whether the operator, PBX and organization actually support the intended call and messaging workflow. Fourteck can review the requirement before the quote so the hardware, network, SIM plan and operational process are considered together.
What Buyers Should Check Before Purchase
The biggest purchase risk is choosing the correct model but the wrong cellular module, route design or integration assumption. Before requesting a quote, confirm the carrier, channel requirement, PBX architecture and site conditions so the gateway can be reviewed as part of the full voice environment.
Configuration Fit
Confirm whether four channels match the expected simultaneous call volume. Review the ordered cellular network type, LTE bands, VoLTE requirement, SIM count and carrier plan. If the project needs fewer or more channels, another TG model may be a cleaner fit.
Compatibility Check
Match the gateway to the PBX, SIP trunk mode, codecs, DTMF method, addressing, firewall policy and VLAN design. For UAE cellular use, confirm the intended operator’s supported bands rather than assuming all 4G modules are interchangeable.
Availability and Warranty
Ask for current availability based on the exact module, quantity and delivery location. Warranty handling can vary with the supply source and commercial terms, so request written guidance for the offered unit rather than relying on a generic assumption.
Quote Preparation
Share the PBX model, operators, number of SIMs, simultaneous call requirement, messaging needs, quantity, site location, target date and installation expectations. These details make it easier to quote a suitable configuration instead of only responding to a model number.
Also consider the less obvious project items: antenna placement and signal strength, Ethernet switch port, rack or desktop mounting, grounding, power protection, cable access, remote administration, configuration backup and the team responsible for PBX routing. If the gateway is being used as a continuity path, test the failover process after installation and document how calls should return to the normal route. If SMS is part of the project, include message ownership, operator restrictions and API requirements in the design. A well-defined request reduces the chance of receiving a technically correct device that does not match the business workflow.
Availability, configuration and service coordination
FourTeck supports Yeastar gateway inquiries in Dubai and across the UAE with assistance for model selection, cellular-module review, PBX compatibility questions, quote preparation, delivery coordination and warranty guidance. Availability may vary with the exact network version, order quantity, supplier position and requested delivery date, so the product should be quoted against the actual requirement rather than treated as a generic four-port item.
Review channel count, operator, LTE module, VoLTE need, SMS functions and PBX integration before ordering.
Confirm current supply options, quantity, destination and project timing so logistics can be planned around the required configuration.
Ask for the warranty terms applicable to the offered product and supply route, especially for project or multi-unit purchases.
Business supply support across major UAE locations
Businesses in Dubai, Abu Dhabi, Sharjah and Ajman can contact FourTeck for Yeastar gateway inquiries, configuration review and quote assistance. A multi-site customer can send one consolidated requirement showing the quantity needed at each location, preferred cellular operators, phone-system platforms and project dates. This makes it easier to review whether every site should use the same hardware and module type or whether cellular and PBX conditions differ between locations.
For branch deployments, it is useful to identify who will install the gateway, who manages the PBX, and who is responsible for SIM activation and carrier support. FourTeck can help structure the product request and delivery plan, while final configuration details should reflect the site’s own network, signal conditions and voice design. Current availability and delivery timing should be confirmed at quotation stage.
GCC and Africa project coordination
FourTeck also supports business technology inquiries across selected GCC and Africa markets through its regional platforms and inquiry channels. Organizations working across the UAE, Saudi Arabia, Qatar, Oman, Kuwait or Bahrain can request guidance on model selection and project supply, while customers in Kenya, Uganda and other African markets can use the relevant FourTeck regional channels for local inquiry handling.
Cellular gateways require more country-specific checking than many standard network products because operator bands, SIM policies, voice-over-LTE support and service conditions can vary. A TG400 configuration suitable for one market should not automatically be assumed suitable for another. Buyers planning regional rollouts should provide the target countries and operators for each site so module compatibility and commercial supply can be reviewed before a standardized bill of materials is approved.
Regional buyers can start with FourTeck UAE, FourTeck Kuwait, FourTeck Kenya, FourTeck Uganda or FourTeck Africa. Availability, delivery options, warranty handling and configuration support may differ by country and supplier status.
Other Yeastar options for different channel requirements
The right gateway size depends mainly on simultaneous cellular call demand and growth. A smaller branch may not need four channels, while a busier office or centralized gateway design may need more. These related FourTeck pages and resources can help buyers compare the direction before requesting a final quote.
Yeastar TG100 GSM Gateway
A compact option for requirements that need a single cellular channel rather than four. It can make sense for a small branch, simple fallback route or limited mobile trunk use where higher concurrency is unnecessary.
Yeastar TG800 Gateway
An eight-channel direction for organizations that expect more simultaneous cellular traffic or want additional trunk capacity. The correct network variant and operator compatibility still need to be confirmed for the project.
4G LTE trunk integration guidance
Useful when the main question is how a cellular gateway fits into a Yeastar PBX design rather than which hardware size to buy.
FourTeck product assistance
Use the contact team when channel count, LTE module, operator compatibility or PBX routing still needs to be reviewed.
When comparing TG models, avoid choosing solely by the number printed in the model name. Estimate concurrent calls, decide whether several carriers need dedicated channels, consider growth, and identify whether the gateway will be centralized or installed per branch. A four-channel model can be a strong middle ground, but the correct answer depends on the business call pattern and operator architecture.
Buying support that focuses on the complete deployment
A cellular VoIP gateway can look simple on a purchase list, but the real requirement crosses telecom, network and PBX responsibilities. FourTeck helps business buyers turn those moving parts into a clearer product request. The goal is to reduce avoidable configuration mismatches and make the quotation more useful to the technical team that will deploy the gateway.
Review the requested model, channel count, network variant and quantity before the supply request is finalized.
Discuss operator compatibility, SIP integration, route requirements, SMS use and installation considerations.
Build the quote around the actual requirement, delivery destination and project quantity rather than only the model name.
Consider how the gateway fits alongside the PBX, LAN, firewall, rack, power and broader communications environment.
Confirm current supply and logistics options based on the exact product version, quantity and destination.
Clarify the warranty terms attached to the offered supply so procurement knows what support expectations apply.
This approach is particularly useful for project orders and multi-site rollouts. Instead of assuming every location has identical cellular coverage and PBX settings, the buyer can provide a common design plus site-specific exceptions. FourTeck can then help identify where the same hardware can be standardized and where a different cellular module, channel count or deployment method may need further review.
Questions business buyers ask about the TG400
What is the Yeastar TG400 used for?
It is used to connect cellular voice services with a VoIP network. The four cellular channels can be integrated with an IP PBX or softswitch so users can make outbound calls through mobile trunks and receive cellular calls through the business phone system. It can also provide SMS, USSD and related SIM-management functions.
Does the TG400 support four 4G LTE channels?
Yeastar’s current TG Series datasheet lists the TG400 with four 4G channels. The exact network type ordered and LTE band support matter, however. Yeastar states that supported LTE bands depend on the cellular module type, so the operator and required frequencies should be confirmed before the gateway is purchased.
Can it connect to a Yeastar P-Series phone system?
Yes. Yeastar publishes current integration guides showing TG400 connected to P-Series Software Edition and P-Series Cloud Edition through SIP peer trunks to extend 4G trunks to the PBX. The final IP addresses, SIP settings, routes and security controls must be adjusted for the real deployment rather than copied from an example environment.
Can FourTeck help check UAE mobile operator compatibility?
FourTeck can help review the requested operator and product configuration before quoting. Buyers should provide the intended SIM operator and, where possible, the relevant LTE or VoLTE requirements. Because cellular bands are module dependent, operator compatibility should be treated as a pre-purchase check rather than assumed from the TG400 model name alone.
Does the gateway support SMS?
Yes. Yeastar documents SMS sending and receiving, bulk SMS, an SMS center and an open API for SMS and USSD. The appropriate workflow depends on whether messages are handled manually in the web interface or integrated with an external application. Carrier rules, message volume and local requirements should also be reviewed for the intended use.
Is this model suitable for a small office?
It can be, particularly when the office needs up to four cellular channels or expects growth beyond one or two trunks. Yeastar also documents use of TG as a SIP registrar for small environments. If the requirement is only a single or two-channel route, a smaller TG model may be more proportionate and should be compared before purchase.
What should I provide when asking for a quote?
Provide the TG400 model request, quantity, intended cellular operator, number of SIMs, required simultaneous calls, PBX or softswitch platform, SMS requirements, delivery location and target date. If installation or configuration support is needed, include that as well. These details help FourTeck review the correct network variant and project fit.
Does availability depend on the exact configuration?
It can. The cellular network type and LTE module are important parts of the product requirement, and supplier availability can also vary with quantity and timing. For that reason, FourTeck confirms current options against the requested configuration rather than presenting an unverified stock statement on the product page.
What installation details should be checked before ordering?
Check cellular signal at the planned antenna location, LAN access, IP addressing, VLAN or firewall policy, available AC power, grounding, ventilation and rack or desktop placement. Also decide who manages the SIMs, PBX routes and gateway administration. These practical details can affect deployment success even when the hardware model itself is correct.
Can businesses request multiple units for branch projects?
Yes, businesses can request project or multi-unit quotations. For branch rollouts, send the quantity per site, delivery locations, operators, PBX platform and whether every branch uses the same network design. FourTeck can help organize the product request, while current availability, commercial terms and warranty guidance are confirmed for the actual order.
Need help defining the right four-channel gateway setup?
FourTeck can review the intended operator, LTE module requirement, PBX platform, call-routing plan, SMS needs, quantity, delivery location and warranty expectations before preparing a quotation. This is especially useful when the project involves several SIMs or sites and the buyer wants to avoid ordering a cellular variant that does not match the deployment.
Share the model, operator, number of channels, PBX type, quantity, site location and target use. Include SMS or installation needs if they are part of the project.
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