Specifications

Chapter 2 – Configuration Commands
Multi-Tech Systems, Inc. AT Commands for EDGE (E1) Modems (S000474A) 41
<cns> Continuous Network Search Mode
This parameter can be used to influence the time the ME takes to register to
the network.
The parameter is global for the ME, volatile, and will not be reset by AT&F.
0 Normal. Default (This is powerup default value which is not stored at
power down).
When trying to register to a network the ME sleeps longer than in "Fast
mode" before restarting a network scan.
1 Fast
"Fast mode" reduces the time the ME sleeps before restarting a network
scan when trying to register.
Advantage: If the ME is out of network service it may take less time to find
a network.
Disadvantage: Higher current consumption while ME is out of network
service.
Note: To monitor the search process it may be useful to have the "+CREG"
URC enabled. Each time the network search starts, the URC "+CREG" equals
"2" (searching). When the network search stops, the URC is issued again,
indicating either "0" (not registered), or "1" (registered) or "5" (registered,
roaming). As long as no network can be found, the URC will be toggling
between "2" and "0".
<ropr> Radio Output Power Reduction
According to 3GPP Rel99, output power reduction for multiple TX slots is a
mandatory feature. The amount of power reduction is configurable up to 3.0dB
for 2TX, 4.8dB for 3Tx to 6dB for 4TX. To optimize heat dissipation, power
consumption, and SAR values, it is recommended to use full power reduction
value 3.
The parameter is global for all interfaces, non volatile, and will not be reset by
AT&F.
1 Medium Reduction at GMSK (0dB reduction for 1TX and 2TX, 1.8dB for
3TX and 3dB for 4TX) and Full Power at 8PSK.
2 Maximal Reduction at GMSK (0dB reduction for 1TX, 3dB for 2TX, 4.8dB
for 3TX and 6dB for 4TX) and Full Power at 8PSK
3 Maximal Reduction at GMSK (0dB reduction for 1TX, 3dB for 2TX, 4.8dB
for 3TX and 6dB for 4TX) and Maximal Reduction at 8PSK (0dB reduction
for 1TX, 3dB for 2TX , 4.8dB for 3TX and 6dB for 4TX). Default (This is a
powerup default value which is not stored at power down).
<tcpBufSize> BufferSize
This value defines the default size of the TCP receive queue in bytes. Higher
values allow higher throughput but less number of parallel connections. The
total throughput is limited by the GPRS/EDGE network resources and cannot
exceed the theoretical maximum gross throughput of 230Kbit.
Parameter is global for the ME and non-volatile. Use of default value is
recommended. If changed the new value takes effect the next time you start
an Internet service with AT^SISO.
3000......20000 Size of TCP receive buffer in bytes. Default = 5200 (This is the
factory default value and will be restored to 5200 with AT&F. It is also a
powerup default value which is not stored at power down).
Possible number of parallel socket connections depending on buffer size:
- 5200 bytes (default): max. 8 connections
- 10000 bytes (medium): max. 4 connections
- 20000 bytes (high): max. 2 connections