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2. GR47/GR48 RADIO DEVICES
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LZT 123 7589 R1A
2.3.2 Short Message Service
The radio device supports the following SMS services:
• Sending; MO (mobile-originated) with both PDU (protocol data unit)
and text mode supported.
• Receiving; MT (mobile-terminated) with both PDU and text mode
supported.
• 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 GSM 03.40.
The maximum length of an SMS message is 160 characters when using
7-bit encoding. For 8-bit data, the maximum length is 140 characters. The
radio device supports up to six concatenated messages to extend this
function. Concatenation is disabled if CNMI 3,2 is set (See the AT
Commands Manual for further details).
2.3.3 Voice Calls
The radio device 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 radio device offers both single ended
and balanced analogue input and output lines. Direct interface to the
digital PCM (pulse code modulation) bus used within the radio device is
available, thus by-passing the internal analogue circuitry.
The radio devices support HR, FR and EFR vocoders.The GR48 also
supports the Adaptive Multi Rate (AMR) type of vocoder.
Duplex spacing 45 MHz 80 MHz
Receiver sensitivity at
antenna connector
< –102 dBm < –102 dBm
Transmitter output power
at antenna connector
Class 4
2W (33 dBm)
Class 1
1 W (30 dBm)
Automatic hand-over between GSM 850 and GSM 1900
GR48 GSM 850 GSM 1900