# Difficulty making data calls **URL:** \ **Category:** General wireless topics\ **Created:** [November 2, 2012, 3:45pm UTC](https://forum.sierrawireless.com/t/difficulty-making-data-calls/5930 "2012-11-02T15:45:33Z")\ **Posts on this page:** 14\ **Page:** 1
**Author:** ![inc](https://avatars.discourse-cdn.com/v4/letter/i/b19c9b/32.png) [@inc](https://forum.sierrawireless.com/u/inc)\ **Post date:** [November 2, 2012, 3:45pm UTC](https://forum.sierrawireless.com/t/difficulty-making-data-calls/5930/1 "2012-11-02T15:45:33Z")
I’ve been given two Erco&Gener GenPro 20e modems. I am fairly new to working with gsm modems and hyperterminal, but I have learned to configure each modem via hyperterminal and a RS-232 port. I would like to establish a data call between the two modems, but I haven’t been able to receive the “Connect 9600” response. I can send/receive SMS between the two which indicates some communication but I’m not sure why I can’t make a data call. I verified with the service provider that 1)both SIMs have a data service 2)modems are in data mode(+cicb+0) and 3) established automatic call response(ATs0+1). Any suggestions are greatly appreciated. ---
**Author:** ![ljweko](https://avatars.discourse-cdn.com/v4/letter/l/47e85d/32.png) [@ljweko](https://forum.sierrawireless.com/u/ljweko)\ **Post date:** [November 2, 2012, 4:34pm UTC](https://forum.sierrawireless.com/t/difficulty-making-data-calls/5930/2 "2012-11-02T16:34:52Z")
Try AT+CBST command, maybe AT+CBST=71 (depending on provider) on both modems. Also make use of AT+CMEE=1 and AT+CEER commands. ---
**Author:** ![inc](https://avatars.discourse-cdn.com/v4/letter/i/b19c9b/32.png) [@inc](https://forum.sierrawireless.com/u/inc)\ **Post date:** [November 2, 2012, 5:03pm UTC](https://forum.sierrawireless.com/t/difficulty-making-data-calls/5930/3 "2012-11-02T17:03:15Z")
> [@ljweko](#): > > Try AT+CBST command, maybe AT+CBST=71 (depending on provider) on both modems. > > Also make use of AT+CMEE=1 and AT+CEER commands. I tried the +CBST=71 suggestion, but no luck on that one. I previously used +cbst=0,0,1. When I use atd, the screen returns WIND5:1, NO CARRIER, WIND6:1. At+CEER command returns ERROR 50. Any other suggestions. ---
**Author:** ![ljweko](https://avatars.discourse-cdn.com/v4/letter/l/47e85d/32.png) [@ljweko](https://forum.sierrawireless.com/u/ljweko)\ **Post date:** [November 2, 2012, 5:10pm UTC](https://forum.sierrawireless.com/t/difficulty-making-data-calls/5930/4 "2012-11-02T17:10:10Z")
Failure cause 50: Requested facility not subscribed You should use CBST setup on both modems. Consult your provider which CBST setup they support. Also AT&W. ---
**Author:** ![inc](https://avatars.discourse-cdn.com/v4/letter/i/b19c9b/32.png) [@inc](https://forum.sierrawireless.com/u/inc)\ **Post date:** [November 2, 2012, 7:06pm UTC](https://forum.sierrawireless.com/t/difficulty-making-data-calls/5930/5 "2012-11-02T19:06:33Z")
> [@ljweko](#): > > Failure cause 50: Requested facility not subscribed > > You should use CBST setup on both modems. Consult your provider which CBST setup they support. Also AT&W. CBST is setup on both modems. Do you mean that I should contact my service provider, AT&T to determine which data rate their GSM network supports? What other reasons could cause a the ERROR 50 to occur? Thanks for your patience as I come up to speed on this project! ---
**Author:** ![awneil](https://avatars.discourse-cdn.com/v4/letter/a/49beb7/32.png) [@awneil](https://forum.sierrawireless.com/u/awneil)\ **Post date:** [November 2, 2012, 8:28pm UTC](https://forum.sierrawireless.com/t/difficulty-making-data-calls/5930/6 "2012-11-02T20:28:52Z")
> [@ljweko](#): > > Failure cause 50: Requested facility not subscribed > [@inc](#): > > What other reasons could cause a the ERROR 50 to occur? Don’t the words “not subscribed” suggest anything to you… ❓ eg, see: [isdn.modemhelp.net/causecodes/ca … list.shtml](http://isdn.modemhelp.net/causecodes/causecodelist.shtml) ---
**Author:** ![inc](https://avatars.discourse-cdn.com/v4/letter/i/b19c9b/32.png) [@inc](https://forum.sierrawireless.com/u/inc)\ **Post date:** [November 21, 2012, 3:32pm UTC](https://forum.sierrawireless.com/t/difficulty-making-data-calls/5930/7 "2012-11-21T15:32:27Z")
> [@awneil](#): > > > [@ljweko](#): > > > > Failure cause 50: Requested facility not subscribed > > > [@inc](#): > > > > What other reasons could cause a the ERROR 50 to occur? > > Don’t the words “not subscribed” suggest anything to you… ❓ > > eg, see: [isdn.modemhelp.net/causecodes/ca … list.shtml](http://isdn.modemhelp.net/causecodes/causecodelist.shtml) ok, I confirmed with my service provider the correct data speed and APN. Even after setting both modems to the correct CBST values and APNs, I still receive a NO CARRIER response. Immediately after issuing the atd comand, I issue a +CLCC command which returns the following: +CLCC: 1,0,2,1,0,“n”,129 where n= dialed number ---
**Author:** ![awneil](https://avatars.discourse-cdn.com/v4/letter/a/49beb7/32.png) [@awneil](https://forum.sierrawireless.com/u/awneil)\ **Post date:** [November 21, 2012, 10:10pm UTC](https://forum.sierrawireless.com/t/difficulty-making-data-calls/5930/8 "2012-11-21T22:10:22Z")
> [@inc](#): > > I confirmed with my service provider the correct data speed and APN I think you must have been talking at cross purposes - APNs have nothing to do with data calls ❗ Unfortunately, if you were just talking to a consumer customer service line, they probably don’t have a clue what you’re talking about! Again, the error code you reported means, Not Subscribed - ie, you don’t have the correct type of subscription. No amount of fiddling with modem settings is going to change that - you need to change or upgrade your subscription to one that does support data calls. ---
**Author:** ![inc](https://avatars.discourse-cdn.com/v4/letter/i/b19c9b/32.png) [@inc](https://forum.sierrawireless.com/u/inc)\ **Post date:** [November 26, 2012, 9:52pm UTC](https://forum.sierrawireless.com/t/difficulty-making-data-calls/5930/9 "2012-11-26T21:52:13Z")
> [@awneil](#): > > Unfortunately, if you were just talking to a consumer customer service line, they probably don’t have a clue what you’re talking about! > > Again, the error code you reported means, Not Subscribed - ie, you don’t have the correct type of subscription. > > No amount of fiddling with modem settings is going to change that - you need to change or upgrade your subscription to one that does support data calls. You are correct when you state that customer service does not have a clue - one rep asked me to describe and APN. I understand that Error 50 indicates that my subscription doesn’t support data calls, yet when I speak with my service provider, they indicate that the SIMs do have data service and I should be able to establish a connection. They state the SIM “profile” indicates I have full functionality(support data calls). My service, AT&T, is giving me conflicting information, hence my confusion. Even when I issue a ATD_99_\*\*1# command, I receive a Connect 9600, a bunch of random characters, then NO CARRIER. Are the AT&T reps giving me accurate information about SIM data plans, because if they are relaying accurate info - I have no idea why I’m receiving an Error 50. ---
**Author:** ![awneil](https://avatars.discourse-cdn.com/v4/letter/a/49beb7/32.png) [@awneil](https://forum.sierrawireless.com/u/awneil)\ **Post date:** [November 27, 2012, 8:02am UTC](https://forum.sierrawireless.com/t/difficulty-making-data-calls/5930/10 "2012-11-27T08:02:09Z")
> [@inc](#): > > I understand that Error 50 indicates that my subscription doesn’t support data calls, yet when I speak with my service provider, they indicate that the SIMs do have data service You are probably talking at cross-purposes: you require, specifically, Circuit-Switched Data (CSD); they are probably using “data” generically, and thinking of IP-based data. > [@](#): > > They state the SIM “profile” indicates I have full functionality(support data calls) See above - they are probably not using “data call” in any technical sense! > [@](#): > > Even when I issue a ATD_99_\*\*1# command, I receive a Connect 9600, a bunch of random characters, then NO CARRIER. No, they are (almost certainly) not random - that will be raw PPP frames that you’re seeing: [FAQ forum/wiki? - #9 by awneil](https://forum.sierrawireless.com/t/faq-forum-wiki/3491/9) > [@](#): > > Are the AT&T reps giving me accurate information about SIM data plans They are probably doing their best - but just not understanding the question. They are trained & equipped to deal with average-joe consumers using (smart)phones - not M2M developers. This is the problem with using a consumer SIM! You should try talking to your local Distributor - they may have experience with how to get what you want from AT&T. Your best option would be to go to a proper M2M service provider who will actually know & understand what you’re talking about… ---
**Author:** ![awneil](https://avatars.discourse-cdn.com/v4/letter/a/49beb7/32.png) [@awneil](https://forum.sierrawireless.com/u/awneil)\ **Post date:** [November 27, 2012, 8:06am UTC](https://forum.sierrawireless.com/t/difficulty-making-data-calls/5930/11 "2012-11-27T08:06:26Z")
Previous UK experience (2007): [https://forum.sierrawireless.com/t/data-on-uk-gsm-networks/1079/1](https://forum.sierrawireless.com/t/data-on-uk-gsm-networks/1079/1) ---
**Author:** ![inc](https://avatars.discourse-cdn.com/v4/letter/i/b19c9b/32.png) [@inc](https://forum.sierrawireless.com/u/inc)\ **Post date:** [November 28, 2012, 7:01pm UTC](https://forum.sierrawireless.com/t/difficulty-making-data-calls/5930/12 "2012-11-28T19:01:30Z")
A mild breakthrough has occurred… I downloaded Discovery Tools and followed its instructions of performing a data call through Network Connections in Control Panel. I dialed _99_\*\*1# and I was able to surf the internet very slowly. So, now that I successfully established a data call within Network Connections(Windows XP), I need to determine why I can’t make a data call within Hyperterminal so I can issue AT commands. One difference between both methods is the Network Connection UI asks for the APN username & password while I’ve never used that info with Hyperterminal. If someone knows the appropriate command to set that for an FXT009, I appreciate the help if I don’t find it first. ---
**Author:** ![awneil](https://avatars.discourse-cdn.com/v4/letter/a/49beb7/32.png) [@awneil](https://forum.sierrawireless.com/u/awneil)\ **Post date:** [November 28, 2012, 7:27pm UTC](https://forum.sierrawireless.com/t/difficulty-making-data-calls/5930/13 "2012-11-28T19:27:25Z")
> [@inc](#): > > I dialed _99_\*\*1# and I was able to surf the internet very slowly. > > So, now that I successfully established a data call No, you have not established a data call - you have established a TCP/IP session! > [@](#): > > I need to determine why I can’t make a data call within Hyperterminal Again, what you have established is not a data call ❗ And, again, what you are seeing in Hyperterminal is the raw PPP frames: [FAQ forum/wiki? - #9 by awneil](https://forum.sierrawireless.com/t/faq-forum-wiki/3491/9) If you want to use Hyperterminal with this TCP/IP connection, you will have to use windows dial-up networking to handle the TCP/IP, and then use Hyperterminal in Telnet mode… ---
**Author:** ![inc](https://avatars.discourse-cdn.com/v4/letter/i/b19c9b/32.png) [@inc](https://forum.sierrawireless.com/u/inc)\ **Post date:** [November 29, 2012, 3:25pm UTC](https://forum.sierrawireless.com/t/difficulty-making-data-calls/5930/14 "2012-11-29T15:25:31Z")
> [@awneil](#): > > > [@inc](#): > > > > I dialed _99_\*\*1# and I was able to surf the internet very slowly. > > > > So, now that I successfully established a data call > > No, you have not established a data call - you have established a TCP/IP session! > > > [@](#): > > > > I need to determine why I can’t make a data call within Hyperterminal > > Again, what you have established is not a data call ❗ > > And, again, what you are seeing in Hyperterminal is the raw PPP frames: [forum.sierrawireless.com/viewto … ppp#p15722](https://forum.sierrawireless.com/t/faq-forum-wiki/3491/9) > > If you want to use Hyperterminal with this TCP/IP connection, you will have to use windows dial-up networking to handle the TCP/IP, and then use Hyperterminal in Telnet mode… Ahhh - thanks for setting me straight! It’s kinda confusing when Sierra Wireless’ Discovery Tool describes this connection as a data call but I know understand it’s not. Please forgive my basic questions since this endeavor is new to me - I looked for instructions about using HT in telnet mode which leads to my next question - is the host address found using ipconfig command?