Technical data

• CBM (cell broadcast message); a service in which a message is sent to all
subscribers located in one or more specific cells in the GSM network (for
example, traffic reports)
• SMS status report according to 3GPP TS 23.40
The maximum length of a text mode SMS message is 160 characters using 7-bit
encoding. The Wireless CPU® supports up to six concatenated messages to extend
this function. Concatenation is performed by the host application.
2.3.3 Voice Calls
The Wireless CPU® offers the capability of MO (mobile originated) and MT (mobile
terminated) voice calls, as well as supporting emergency calls. Multi-party, call
waiting and call divert features are available. Some of these features are network-
operator specific.
For the inter-connection of audio, the Wireless CPU® offers both single ended and
balanced analogue input and output lines. Direct interface to the digital PCM (pulse
code modulation) bus used within the Wireless CPU® is available, thus by-passing the
internal analogue circuitry. The Wireless CPU®s support HR, FR, EFR and AMR
vocoders.
2.3.4 Data
The Wireless CPU® supports the following data protocols:
• GPRS (General Packet Radio Service)
The Wireless CPU® is a Class B terminal. The Wireless CPU® is GPRS multi-slot
class10 (4+2) enabled, capable of receiving at a maximum of four timeslots
per frame (down link), and transmitting in two timeslots per frame (up link).
See section 2.3.5 for multi-slot allocation by class.
• CSD (Circuit Switched Data)
The GR64 Wireless CPU® is capable of establishing a CSD communication at
9.6 kbps over the air.
GR64 Integrators’ Manual
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