Integration Manual

HMS1 Hardware Interface Description
Confidential / Preliminary
s
HMS1_HD_V01.62 Page 6 of 39 2006-08-21
1. Introduction
This document describes the hardware of the Siemens HMS1 module that connects to a
cellular device application and the air interface. It helps you quickly retrieve interface
specifications, electrical and mechanical details and information on the requirements to be
considered for integrating further components.
The HMS1 module is a single band WCDMA, quad band GSM/GPRS data modem and
features high downlink speeds using HSDPA. It can be connected to a standard PC via USB
interface for high speed data communication, such as email, web browsing, data base
retrieval, server access, as well as audio and video streaming.
1.1. Related Documents
[1] HMS1 AT Command Set, Version
01.62
[2] DSB75 Support Box - Evaluation Kit for Siemens Cellular Engines
1.2. Terms and Abbreviations
Abbreviation Description
A/D Analog-to-Digital Converter
AF Audio Frequency
AFC Automatic Frequency Control
AGC Automatic Gain Control
AMR Adaptive Multi Rate
ARP Antenna Reference Point
ASIC Application Specific Integrated Circuit
BB Baseband
CPU Central Processing Unit
CR Change Request
CTR Common Technical Regulation
DAI Digital Audio Interface
/DCD Data Carrier Detect
DFC Digital Frequency Centering
DSB Development Support Board
DSP Digital Signal Processor
/DSR Data Set Ready
/DTR Data Terminal Ready
DTX Discontinuous transmission