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 3G/4G/LTE Broadband Cellular Routers

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Product overview

User Scenario

Key features


Introduction to the Teldat K  4G / LTE  metro ethernet compact router


The Teldat-K and Teldat KF routers are designed for branch offices with high speed accesses, whether these are fixed or mobile, with the added value of maximum processing capacity thus providing advanced features such as high speed routing, security and quality of service.



LTE/4G Teldat K Router - Product overview


The Teldat-K/KF routers offer corporations access to high speed networks whether they are fixed (FTTH) or mobile (LTE) and at the same time provide maximum quality, security and compatibility.  Depending on the network access, these are divided into two models with the following characteristics. 

Teldat-KF: WAN Ethernet Connectivity

  • 4 x Gigabit-Ethernet LAN Switch.
  • Gigabit-Ethernet WAN Port.

Teldat-K: Wireless WAN 4G/3G connectivity

  • (3G, 3.5G, 4G, LTE) as the main access or as backup for the WAN Ethernet
  • 4x Gigabit-Ethernet LAN Switch.
  • Gigabit-Ethernet LAN Port (with PoE)
  • Embedded WLAN IEEE 802.11 a/b/g/n interface MIMO 2x2, with professional security (IEEE 802.11i)

Characteristics common to both models are

  • Embedded WLAN IEEE 802.11 a/b/g/n interface, with professional security (IEEE 802.11i).
  • USB Host 2.0 port to connect 3G/4G external modems.
  • Desktop format and ready for wall installation.
  • Optional hardware encryption, optimizing transmission of encrypted traffic.
  • External power supply (90-240Vac adaptor) or via Ethernet (PoE client integrated in 1xGigabit port).
  • The absence of fans together with an innovative design mean they can be installed anywhere in the office.






4x10/100/1000 Switch



3G/4G internal module



1x10/100/1000 Ethernet

Yes (WAN)

Optional as LAN (license) *

802.11 a/b/g/n WiFi

Optional (license)

Optional (license)

USB 2.0 port

Optional (license)

Optional (license)


* 1x10/100/1000 license in the Teldat-K disables the 4x10/100/1000


With minimum performance impact, the device can transmit all or determined encrypted branch traffic flows, while maintaining maximum security levels in the communications.  The router also has a “stateful” access list system (Firewalling based on states) and an Application Layer Gateway (ALG) function thus providing the maximum level of perimeter protection.

Teldat’s hierarchic QoS System (Teldat BRS) allows priority, modeling and independent tagging in each traffic flow (VoIP, Data with priority 1, Data with priority 2, etc.), so it is appropriately handled in the transport network, simplifying the service level policy definitions (SLA) which are  adapted to each of the branch applications.
The Teldat K has a command interface (CLI) fully adapted for professional use. Additionally the router possesses all the functions and features needed in the corporate sector for efficient, detailed and centralized management over the TeldaGES management platform.
Corporate management features are fully supported (SNMPv1/2/3 fully parameterized complying with MIB-2 and Teldat’s MIB, FTP, TFTP, RADIUS, Syslog, etc), simplifying seamless integration in the company’s existing communications management platform.






 LTE / 4G Teldat K router - User Scenarios


Integrated solution for Data and Voice through Metro Ethernet




Figure2. Data and Voice Metro Ethernet communications solution with the Teldat KF 


As shown in Figure 2, the Teldat-KF interconnects the head office voice and data applications with the Service Centers through the Metro Ethernet access.  The Telephony over IP support means that the Teldat-K delivers top quality IP Telephony services to the IP extensions (SIP telephones).



Integrated Voice and Data Metro Ethernet solution with Wireless WAN backup



Figure 3. Data and Voice communications solution with the Teldat K with WWAN 4G/3G backup


Figure 3 shows the backup solution added to the previous case. Should the main Metro Ethernet connection drop, the 3G/4G connection automatically activates.
Intelligent main line failure detection means that the line never actually drops as the 3G/4G backup activates due to degradation. For this either routing protocols can be used or the Teldat K can be configured to execute periodic polls over the line to detect packet loss rate, delays or jitter over a threshold, which triggers the backup line.

Integrated solution for Voice and Data convergence in Wireless WAN networks

Figure 4. Voice and Data convergence communications solution for Data and Voice with the Teldat K
As shown in Figure 4, the Teldat-K interconnects VoIP and Data aplications from the Service Centers through Wireless WAN access, either permanently or on demand.  To increase reliability, a second connection through an alternative mobile carrier can be used as backup, either through the internal 4G/3G WWAN module with the 2º SIM card or an external 3G/4G module via USB.

Simultaneous to data transmission over Wireless WAN, the Teldat-K supports IP Telephony and GSM voice calls integrating voice and data communications in a single device and thereby allowing the Teldat-K to both manage the Data and Telephony service as well as maintaining the telephone service.  Should the IP WWAN connectivity drop or suffer excessive degradation (the service drops or there is an unacceptable latency, jitter or error rate for Telephony over IP) the Teldat-K transmits all calls as voice over GSM to the public telephone network.  The voice characteristics are fully interoperable with Teldat’s Unified Communications and those from third parties (Alcatel, Aastra, Cisco, etc).

Dual backup: Backup for access and devices

Figure5. Backup solution with two devices - Teldat K
The use of a dual device and double line in offices provide a much higher backup level as dependence on a single point of failure is eliminated.  In normal conditions the fixed access is used unless there is a drop in that line or in the device it is connected to; in either case, the Teldat-K establishes the backup connection thus providing the branch office with service.  The Teldat-K constantly synchronizes and monitors the main router through TVRP (a Teldat protocol that’s 100% compatible with HSRP) or through standard VRRP.  This backup is transparent to the devices and the office applications do not need any additional configuration.

As in the previous case, the Teldat-K can deliver Telephony service to the office, both calls via GSM as well as local telephone survival.





LTE / 4G Teldat K router - Key Characteristics


Ethernet Services

  • WAN Ethernet: Gigabit-Ethernet 10/100/1000 port.
  • Integrated Ethernet switch: 4 x Gigabit-Ethernet 10/100/1000 ports.
  • Full independent SNMP management per Ethernet port.
  • Full VLAN support (trunking, filtering, QinQ, etc.)

Integrated Wireless WAN Communications Service

  • Embedded 3G/4G interface (depending on the model), permanently monitored by the router’s management motor.
  • Fully managed router motor: Teldat 3G/4G interface commands and the interface are integrated in the generic network management platforms (SNMP management through the 3G interface Teldat MIB.)
  • 3G/4G interface fully integrated in the router’s Internetworking protocol architecture (CIT features) thus providing high quality and efficient 3G/VPN services.
  • Three backup options for the main 4G service: Through the secondary SIM card, the external USB/3G modem and by connecting to an alternative APN (double PDP context).
  • Protected against malicious attacks on the SIM card (internal SIM tray).
  • Improved 3G/4G signal stability in areas with poor WWAN coverage: two SMA ports for external 3G antennas (Rx Diversity).
  • Passive Wireless WAN monitoring mechanisms (unnecessary to transmit polling traffic): Thanks to the constant monitoring the router carries out over the signal coverage, the connection to the mobile network, the IP connection and the detailed monitoring of the branch traffic transmitted and received over the WWAN link, the router can accurately and dynamically detect incidences in device performance and take the appropriate actions (WWAN backup, trap reports, etc) minimizing the time the communications service is unavailable.
  • Active Wireless WAN monitoring mechanisms (polling traffic): The router is also capable of detecting excessive degradation in the WWAN service using established parameters (delay, jitter and error rate) in order to execute the appropriate actions.
  • Advanced WirelessWAN diagnostics: In addition to the instant diagnostics from the radio interface, the router can capture relevant WWAN parameters such as signal coverage, offering reports on this evolution over time either on the device console or in the Teldat central network management platform (TeldaGES).
  • Audio GSM calls supported, simultaneously with 3G data transmission for emergency telephony services.
  • AT commands interface to complement the Teldat 3G interface commands for low level embedded communications module customization (SIM lock/unlock, etc).
  • WWAN+: Proprietor management system to improve IP network protocols for use in cellular networks.

Corporate Services

  • Border router for different dynamic routing domains (RIP, OSPF, BGP), administrative distance in IP routes, route filtering based on maps and policy-based routing (PBR) favor the implementation of corporate convergent services which combine Wireless WAN and landline access.
  • VRF to adapt to complex or multiclient environments.
  • Multi-HSRP and Multi-VRRP for network resilience and load balance applications.
  • Link quality monitoring through the Teldat NSM/NSLA system adapts the routing policy based on link quality (RTT, erroneous frame rate and UDP jitter).
  • Teldat’s hierarchic QoS system.  Flexible application for flow priority, traffic marking and classification means that efficient use is made of the network resources and an accurate definition of the service level agreements (SLAs).
  • USB 2.0 port for connecting external 3G/4G modems.
  • Absence of fans so the routers can be installed anywhere in the branch.

Wireless WAN Communications Service through external USB-3G/4G Modem

  • Simple migration of 3G architectures to 3.5 or 4G (LTE) architectures or future ones, thanks to the use of an external module permitting these to easily and quickly adapt to deployments of new mobile carrier technology.
  • 3G/4G enabled in the field without internal intervention in the device; this only requires the USB port to be remotely enabled through a license.  This permits you to unify the device pool with and without 3G/4G and defer the costs of 3G/4G connectivity to only those devices that require this and when they require it.
  • WWAN+: Proprietor management system to improve IP network protocols for use in cellular networks.

Secure Communications

  • Encryption processor incorporated; optimizes device performance in scenarios with IPSec tunnels.
  • Fully parameterized IPSec Client/Server. Advanced IPSec features such as PKI encryption (Digital Certificates), extended authentication and Reverse-Route Injection guaranteeing compatibility with other commercial VPN solutions.
  • Latest generation meshed topology VPN networks (Dynamic Multipoint VPN technology).
  • IP filtering, MAC filtering and the SPI firewall protect the router from DoS attacks.

High Performance WLAN Module

  • Embedded WLAN module (depending on the model) IEEE 802.11b/g/n 2x2 MIMO depending on the model).
  • WiFi speed of up to 300Mbps
  • Professional security (IEEE 802.11i/WPA-2).
  • Configurable “Access-Point” and “Client” operation mode, either to reroute from the Wi-Fi terminals to the mobile network (access to Internet or to corporate VPN, depending on the service specifications, operating as “Access-Point”), or to connect the router to the branch WiFi network to access certain applications in the branch (“Client” mode).

Simple to install and deploy, suitable for massive deployments 

  • Power through Ethernet (integrated PoE client): Removes the need for an external power source near the router.
  • The box can be adapted for wall installation, which together with the Ethernet power means the router can be installed at the best coverage point.
  • Router configuration in a single text file (Teldat commands file), easily replicated.
  • The Teldat-K/KF routers can be configured with a personalized default configuration for the service.
  • Graphic configurators can be implemented for installers/operators, and customized depending on the specific needs of each service implemented with the Teldat-K/KF.

Efficient communications management

  • Powerful Teldat command console, adapted for professional-class device management.
  • A Syslog client reports any events detected by the Teldat Events Logging System.
  • SNMPv3 agent provides the ability to send traps and read MIB2 and Teldat-MIB depending on the defined management communities.  The Teldat-K can easily be integrated in the existing network management platform.
  • Network clock synchronization (NTP Client).
  • Intuitive and efficient management of Teldat-K routers through the Teldat network management platform (TeldaGES).
  • Telnet, SSH2, FTP, TFTP and RADIUS Client.




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