Product Overview; Features - Motorola B89 Service Manual

Product Overview

Product Overview

Features

6
Motorola PF B89 telephones are the smallest and lightest global system for mobile
communications (GSM) general packet radio service (GPRS) wireless application
protocol (WAP)-enabled mobile phones currently available. The PF B89 incorpo-
rates a new user interface (UI) for easier operation, allows short message service
(SMS) text messaging, and includes personal information manager (PIM) function-
ality. It is a tri-band phone that allows roaming within the GSM 900 MHz, digital
cellular system (DCS) 1800 MHz, and personal communications services (PCS) 1900
MHz bands.
PF B89 telephones support GPRS and SMS in addition to traditional circuit
switched transport technologies. GPRS, where available, provides substantial
increases in mobile data communications performance and the efficient use of radio
spectrum. Data transmission rates for GSM networks can potentially increase from
the current rate of 9.6 kbps up to a theoretical maximum of 171.2 kbps. An increased
data rate is by no means the only benefit provided by GPRS. A key advantage is
the provision of a permanent virtual connection to the network. This "always on"
connection is possible because GPRS uses packet data transfer so that, for example,
email can be downloaded in "background mode." There is no need for the user to re-
connect before requesting a service, eliminating connection set-up delays and
adding convenience and immediacy to data services access. The "virtual" nature of
this connection means that network resources are not consumed during periods
when a user is not actually sending or receiving data.
PF B89 telephones have a clam form factor. They are made of a polycarbonate plastic
with the display and speaker located in the flip. The bottom part of the clam (front
housing) contains the keypad, transceiver printed circuit board (PCB), microphone,
flex connection, external accessory connector, smart button, volume buttons, and
voice button. The battery and battery door are integrated into a single unit with
two types available to provide standard and extended operation. The phone accepts
both 3V and 5V mini subscriber identity module (SIM) cards which fit into the SIM
holder underneath the bezel on the outside of the flip. The antenna is a fixed stub
type antenna. The service indicator (status light) displays flashing green while in-
service, flashing amber when roaming, flashing red while out of service, and
alternating red / green when ringing.
PF B89 telephones use advanced, self-contained, sealed, custom integrated circuits
to perform the complex functions required for GSM GPRS communication. Aside
from the space and weight advantage, microcircuits enhance basic reliability,
simplify maintenance, and provide a wide variety of operational functions.
Features available in this family of telephones include:
• Lower voltage technology that provides increased standby and talk times
• Extended GSM (EGSM) channels
• Tri-coder/decoder (CODEC) that allows full rate, half rate, and enhanced full
rate modes of transmission
• Supports SMS, concatenated SMS, and cell broadcast messages
• Supports GPRS, circuit switched, and SMS networks
• WAP 1.1 compliant
• 96 x 64 pixel liquid crystal display (LCD) with 3 lines of text, 1 line of icons,
and 1 line of prompts
• Display zoom
May 15, 2001
Product Family B89
6881038B20