Hello everyone! I need help or advice… I have a Cudy LT500D router with an EC200AELLAR01A09M16 modem inside. According to the documentation, in 3G mode, it should support HSPA+ at 21 Mbps, but in my case, it connects to the tower in HSDPA 14 Mbps (WCDMA 2100). The tower also supports DC-HSPA+ Dual 42 Mbps, but the EC200A only supports 21 Mbps. I tried to force HSPA+ mode using an AT command, but it gives an error. Here’s the data:
AT+QCFG="band"
+QCFG: "band",0x10,0x10
OK
+QNWINFO: “HSDPA”,“25702”,“WCDMA 2100”,10688
When I execute the command:
AT+COPS=1,0,"25702",6
I get “OK” in response. But when I try to enable HSPA+ with:
AT+COPS=1,0,"25702",8
I get an error:
+CME ERROR: 50
Parameter
Write Command
AT+COPS=<mode>[,<format>[,<oper
>[,<Act>]]]
Response
OK
If there is any error related to ME functionality:
+CME ERROR: <err>
Maximum Response Time 300 s, determined by network.
Characteristics /
Reference
3GPP TS 27.007
<stat> Integer type.
0 Unknown
1 Operator available
2 Current operator
3 Operator forbidden
<oper> String type. Operator in format as per <format>.
<mode> Integer type.
0 Automatic mode. <oper> field is ignored
1 Manual operator selection. <oper> field shall be present and <Act> optionally
2 Manually deregister from network
3 Set only <format> (for AT+COPS? Read Command), and do not attempt
registration/deregistration (<oper> and <Act> fields are ignored). This value is
invalid in the response of Read Command.
4 Manual/automatic selection. <oper> field shall be presented. If manual selection
fails, automatic mode (<mode>=0) is entered
<format> Integer type.
0 Long format alphanumeric <oper> which can be up to 16 characters long
1 Short format alphanumeric <oper>
2 Numeric <oper>. GSM location area identification number
<Act> Integer type. Access technology selected. Values 3, 4, 5 and 6 occur only in the response
of Read Command while MS is in data service state and is not intended for the AT+COPS
Write Command.
0 GSM
2 UTRAN
3 GSM W/EGPRS
4 UTRAN W/HSDPA
5 UTRAN W/HSUPA
**6 UTRAN W/HSDPA and HSUPA**
7 E-UTRAN
**8 UTRAN HSPA+**
any ideas on how I can turn on only HSPA + 21 Mb/s?
