User manual

Application Overview ADTRAN Routers with CradlePoint CBA750B

Application Overview

This solution guide provides interoperability support for integrating ADTRAN routers with the

CradlePoint CBA750B cellular broadband adapter. This integration uses the CradlePoint CBA750B to

provide a 3G/4G WAN backup solution for ADTRAN routers. In addition, the CradlePoint CBA750B can

be used as a temporary or mobile primary WAN connection. For example, it can be used while waiting for

a primary WAN service to be installed or in mobile applications, such as kiosks.

CradlePoint CBA750B

The CradlePoint CBA750B is a router with an integral USB interface for connecting to a wireless modem.

A companion 3G/4G wireless modem module (CradlePoint MC200LE) connects to the USB interface. The

CradlePoint ARC Series combines these two products in a bundle solution.

The CradlePoint CBA750B provides a single Ethernet interface for connecting to the LAN. The CBA750B

can operate in two modes either Router or IP Passthrough. When in IP Passthrough mode, it connects

the attached wireless modem to the LAN interface without performing routing functions. IP Passthrough

mode still enables access to the CradlePoint CBA750B management web graphic user interface (GUI) for

administration.

Figure 1. CradlePoint CBA750B with attached MC200LE Wireless Modem

Network Topology

Figure 2 shows a network deployment for an ADTRAN router with the CradlePoint CBA750B providing

wireless WAN backup. The ADTRAN router Ethernet interface connects to the LAN port on the

CBA750B. In this example, the primary WAN uses a static public IP address. The secondary wireless

WAN uses DHCP to learn the gateway IP address from the service provider (Verizon). This network

topology was used to verify interoperability.