System information

221 02-FGB 101 544 Uen H – June 2009 23
4 Mobile Network Features
4.1 Preferred Roaming List (PRL)
The PRL contains information regarding the allowed systems and
frequency bands. The PRL structure and coding is defined in TIA/EIA IS-
683.
The Ericsson W3x uses the configured PRL region during the system
selection and acquisition process, initially and when roaming.
4.2 PDP Contexts
The Ericsson W3x supports configuration of two simultaneous primary PDP
contexts for the WAN interface. It is also possible to configure one
secondary PDP context for each primary PDP context.
Configured PDP contexts can be individually enabled/disabled and includes
the following settings:
• APN
• PPP username and password
• PDP authentication type (CHAP or PAP)
The above parameters can be configured either manually or automatically
based on the SIM card’s MCC and MNC. The Ericsson W3x includes a pre-
defined list with commonly used APNs, PPP username/password, and
authentication type.
4.2.1 QoS Profile
A QoS profile (interactive or streaming) can be set for each PDP context.
For the “streaming” profile the maximum and guaranteed bit rate for both
uplink and downlink can be configured.
4.3 Mobile Network
The Ericsson W3x connects to the UMTS (3G) network when it is available
and, if enabled, uses the GSM/GPRS/EDGE (2G) network as fallback. It is
possible to configure if fallback should be enabled or disabled.
4.3.1 W35 Frequency Band Selection
The Ericsson W35 includes the possibility to individually enable/disable
frequency bands used for the connection; 850, 900, 1900 and 2100 for the
UMTS (3G) network and 850, 900, 1800 and 1900 for the
GSM/GPRS/EDGE (2G) network.
Note that there are different product variants available supporting different
frequency band combinations.