Product Overview; Features - Motorola oC81 Series Service Manual

Product Overview

Product Overview

Features

10
Motorola A388c telephones are global system for mobile communications (GSM)
general packet radio service (GPRS) wireless application protocol (WAP)-enabled
mobile phones with full-featured personal information manager (PIM)
functionality. The A388c incorporates a large task-based touch screen display user
interface (UI) featuring handwriting recognition for email and short message
service (SMS) text messaging. 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.
A388c 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 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. In addition to increased data
rate, GPRS provides 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" without need for the user
to reconnect before requesting a service. This eliminates connection setup delays
and adds convenience and immediacy to data services. The "virtual" nature of this
connection means network resources are not consumed during periods when a user
is not actually sending or receiving data.
A388c telephones have a clam form factor. They are made of a polycarbonate plastic
with the earpiece speaker located in the flip. The flip features a viewing window
that allows a portion of the display to be seen with the flip is closed. The bottom
part of the clam (front housing) contains the touch screen display, main printed
circuit board (PCB), microphone, external accessory connector, infrared (IR)
communications port, and headset jack. Also located in the front housing are the
voice, volume, power, page up, page down, and menu buttons, as well as the battery,
antenna, subscriber identity module (SIM) holder, and status light. A stylus, also
located in the front housing, is provided to aid manipulating the touch screen UI.
The battery and battery door are integrated into a single unit to minimize overall
phone thickness. The phone accepts both 3V and 5V mini SIM cards which fit into
the SIM holder beneath the battery. 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.
A388c 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
• Supports POP3, IMAP4, MIME and SMPT email protocols
March 21, 2003
Product Family 0C81
6809462A54