User's Manual

Boomer II User Manual & Integrator’s Guide ____________________________________________ Integrator’s Task
BM210012WT37 15 Copyright Wavenet Technology © November 2003
support for packet headers, the number of active users on a shared RF
channel can directly affect network throughput.
Define a Service Strategy
The service strategy determines whether the integrated modem is the
cause of a user’s problem and sets a policy for keeping the end user
operational during repair. The service strategy must consider all
potential service situations and evaluate them in light of the usage
model.
To ensure that a final product can be efficiently serviced, you must
design for service-ability early in the development process. At a
minimum, you must develop a functional service strategy that contains
a well-considered procedure for performing unit-level screening. The
test must primarily determine whether a fault lies with the modem or
with the product. The test must also screen for network problems and
human error.
Wavenet provides an evaluation board (a standalone test jig) and
various software test utilities. The evaluation board provides a
mounting platform and electrical interface to the modem. Testing is
performed much more efficiently while the modem is still integrated
within the host/terminal, whether for a factory end-of-line test or while
at the user’s site.
For your product to allow integrated testing of the modem, you are
required to provide modem pass-through mode and utilise Wavenet
Commander software. See “End User Problem Resolution” on page 76.
Without pass-through, the modem must be mounted on the evaluation
board for diagnostics and troubleshooting. Pass-through mode also
allows for modem software upgrades.
A thoroughly developed OEM serviceability plan typically includes a
needs assessment for developing software utilities that can assist in
identifying communication problems between the host/terminal and the
modem and between the modem and the RF network.
These utilities must be able to send commands to the modem, evaluate
the modem responses, perform network connectivity testing, and verify
data communication with the network.
The utilities can be developed using NCL. This link-layer protocol set
provides the capability to monitor and evaluate the modem’s operating
condition and all communications to and from the network Enterprise
Server Application. NCL 1.2 uses a command-response functional
model. First, the network Enterprise Server Application asks for
modem status and status of network connectivity.
The modem then responds with its status and the state of network
connection management.
Such a software utility is essential for field service engineers and shop
technicians to diagnose problems with the product and to troubleshoot
a problem to a failed assembly or mismanaged communication link.