Option OGTM353-W GSM/GPRS/UMTS/HSDPA QUAD BAND PCI MINI CARD User Manual Cobra Module
Option NV GSM/GPRS/UMTS/HSDPA QUAD BAND PCI MINI CARD User Manual Cobra Module
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Contents
- 1. Integration Manual
- 2. User Manual
User Manual




![General Document, Register Cobra module on CMU200 Author: Version: V01 –F1Creation Date: Jul 31, 2006 Page: 4 of 6 Option Confidential: This document is Option Confidential - it may not be duplicated, neither distributed externally without prior and written permission of Option NV. 2.2 Settings on the module When previous steps didn’t do the trick, please check the settings on the card. All steps mentioned next, should be evaluated in this order. After each step, perform a safe removal of the card. 1. At_opbm When not working in a shielded environment, all life networks could interfere with the signal coming from the CMU. When the simulated network is not in the same band as the surrounding life networks, this problem can be avoided by deselecting all other basebands but the one you are working in. This could be done using the at_opbm command: Extract from datasheet: Preferred Band Mode _OPBM Command Possible response(s) _OPBM=<band>,<n> OK _ OPBM =? _OPBM: (list of supported <band>s) _ OPBM? <band>: <n>[<CR><LF><band>: <n>[…]] Description This command is used to disable/enable specific frequency bands. Defined Values <band> “ANY” : any band “EGSM” : EGSM (900MHz) band ”DCS” : DCS (1800MHz) band ”PCS” : PCS (1900MHz) band ”G850” : GSM 850MHz band ”U2100” : WCDMA 2100MHz band ”U1900” : WCDMA 1900MHz band “U1700” “U17IV” “U850” : WCDMA 1900MHz band <n> 0 : disable 1 : enable Eg: if you use GSM1900 (PCS) band, select only this band. All other bands have to be deselected. It is also very important to deselect EVERY UMTS band when trying to connect to a GSM network and vice versa:](https://usermanual.wiki/Option/OGTM353-W.User-Manual/User-Guide-715200-Page-5.png)
![General Document, Register Cobra module on CMU200 Author: Version: V01 –F1Creation Date: Jul 31, 2006 Page: 5 of 6 Option Confidential: This document is Option Confidential - it may not be duplicated, neither distributed externally without prior and written permission of Option NV. At_opbm = “PCS”,1 (selection of PCS band) At_opbm = “DCS”,0 (deselection of DCS band) Same for the other bands, also the UMTS bands!!! To check if the band is really (de)selected, use “at_opbm?” The bands showing 0 are deselected, the bands showing 1 are selected. 2. AT_OPSYS When the band settings did not work, try the OPSYS command: this command selects the UTRAN and the packet and/or circuit switched domain. Extract from datasheet: Preferred SYStem “AT_OPSYS” Command Possible Response(s) _OPSYS=[<mode>[,<domain>]] OK _OPSYS? _OPSYS: <mode>,<domain> _OPSYS=? _OPSYS: (0-5),(0-6) Description This command changes the preferred system, GSM/WCDMA, the acquisition order and the service domain preference PS/CS. Defined values <mode>: 0 GSM only 1 WDMA only 2 GSM first 3 WCDMA first 4 No change 5 Auto <domain>: 0 Acquire only circuit-switched systems 1 Acquire only packet-switched systems 2 Acquire circuit-and/or packet-switched systems 3 Any domain will do; no preference Eg: at_opsys=0,2 selects options: GSM only and CS & PS domains](https://usermanual.wiki/Option/OGTM353-W.User-Manual/User-Guide-715200-Page-6.png)
