User Manual

DM15/25 Integrator’s Manual 31 OF 38
Electrical
characteristics at the
antenna interface
Nominal impedance
50 Ω (better than 2:1)
Output Power 3 Watt peak (Class 1) Burst Modem, AMPS
2 Watt peak (Class 2) AMPS, DAMPS
0.6 Watt peak (Class 4) AMPS, DAMPS, PCS
Static Sensitivity Better than - 116 dBm 12 dB SINAD, AMPS
Better than - 110 dBm <3% BER, DAMPS
Better than –110 dBm <3% BER, PCS
6.5 Functional Description
This chapter describes the functionality of the DM-15/DM-25 module. The module performs a set of telecom services
according to TIA/EIA-136. The functions of the display and keypad, usually used to make calls, are implemented by issuing
AT Commands over the serial interface. To find out how to send SMS messages, make data calls, use the burst mode services
and handle the Phone Book.
6.5.1 Speech Calls
The module offers the following telecom services:
• Telephony according to EIA/TIA-136.
• Emergency according to EIA/TIA-136.
An incoming call is indicated by an AT unsolicited result code (RING indicator).
The audio input and output signals in the interface (AFMS and ATMS) will carry analog speech in full
duplex (transmitting and receiving simultaneously). The module supports both Full-Rate speech coding and
Enhanced Full-Rate (EFR), if EFR is available in the network. For EFR to be usable, changes must be made
in the module’s internal parameters.
6.5.2 Value Carrier Services
The module supports the following value carrier services:
• Calling Line Identification Presentation (CLIP). Enables the called module to get the CLI
(phone number) of the calling party.
• Calling Line Identification Restriction (CLIR). Allows the calling module to enable or
disable the presentation of the CLI (phone number) to the called party when originating a call
(dialling).
• Call Forwarding. Permits the called module to have the network send incoming calls to a
desired phone number.
• Call Waiting. Permits the module to be notified of an incoming call, for example, if the module
is engaged in an active call. The module can either accept, reject or ignore the incoming call.