Rainbow Electronics GE863-PY - Manual (Page 46)

GE863 Hardware User Guide
1vv0300783 Rev.0 - 10/06/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 46 of 80
7 Audio Section Overview
The Base Band Chip of the GE863 Telit Module provides two different audio blocks; both in transmit
(Uplink) and in receive (Downlink) direction:
“MT lines” should be used for handset function,
“HF lines” is suited for hands -free function (car kit).
These two blocks can be active only one at a time, selectable by AXE hardware line or by AT
command. The audio characteristics are equivalent in transmit blocks, but are different in the receive
ones and this should be kept in mind when designing.
The Audio Paths are described in the block diagram on next page.
For a full description on how to design the Audio section on your application please refer to the
following document:
• M2M Telit Modules Audio Application Note code: 80000NT10007a