Telit Wireless Solutions GE863-QUAD - Manual (Page 30)

GE863-QUAD
GE863-PY
1vv0300715 Rev. 1 - 19/09/06
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Right reserved page 30 of 79
7 Audio Section Overview
The Base Band Chip of the GE863-QUAD / PY 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.