User's Manual Part 1

Product Overview — Operational Features 7
P/N 9002363 Revision 1.8
A SIM card must be present in the device at all times to allow network access.
A SIM card is required for all PC Card functions except emergency calls.
SIM cards can be moved from one device to another without the need to inform the
network carrier. SIM cards may be configured differently to support different modes of
operation.
Operational Features
Table 2: Summary of Operational Features
Feature Description
Class of Operation Class B: Modem supports both GSM CSD and GPRS Packet data, but will not support
both simultaneously
GSM Circuit Switched Data
(CSD)
Transparent and non-transparent CSD over GSM networks up to 14.4kbps
General Packet Data Service
(GPRS)
• MS-10 operation
• Type 1 device (Simplex RF operation)
• up to 4 receive slots, up to 2 transmit slots, for a combined maximum of 5 slots
• 4/1, 3/1,3/2,2/2, 2/1 combination provides theoretical rates of up to 56 kbps
receive and 28 kbps transmit
• automatically maintains GPRS virtual circuit when CSD or Voice traffic is present
SMS (Short Messaging Ser-
vice)
Mobile originated and mobile terminated SMS messages.
Voice (May not be supported
on all devices)
Supports voice communication using any differential headset.
AT Commands Standard GSM AT Command set with enhancements (See Chapter 3: AT Com-
mands).
SIM card
Merlin modem