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Trouble getting into AT commands on 881G router

I am just learning the 881G router with 3G and am having trouble accessing the AT commands to try and make some modifications to the band that is used.  Here is my config.

version 12.4 no service pad service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname yourname ! boot-start-marker boot-end-marker ! logging message-counter syslog logging buffered 51200 warnings enable secret 5 $1$VwBA$Ij0wAM4e2y9w9h0hBud5s/ ! no aaa new-model memory-size iomem 10 ! crypto pki trustpoint TP-self-signed-434593446 enrollment selfsigned subject-name cn=IOS-Self-Signed-Certificate-434593446 revocation-check none rsakeypair TP-self-signed-434593446 ! ! crypto pki certificate chain TP-self-signed-434593446 certificate self-signed 01   3082024D 308201B6 A0030201 02020101 300D0609 2A864886 F70D0101 04050030   30312E30 2C060355 04031325 494F532D 53656C66 2D536967 6E65642D 43657274   69666963 6174652D 34333435 39333434 36301E17 0D313030 33323631 36323834   385A170D 32303031 30313030 30303030 5A303031 2E302C06 03550403 1325494F   532D5365 6C662D53 69676E65 642D4365 72746966 69636174 652D3433 34353933   34343630 819F300D 06092A86 4886F70D 01010105 0003818D 00308189 02818100   9D5D3ADC 683BB8F5 C655E48A A7AA2689 75267789 E227F60E 4D6EAC29 AB9C1476   AB77EB78 61BB2E9C A9D1123F 7E5501B9 BBD49AEE 314484AF CE72EEE2 0461582A   B1F6F6CD A91A0B9B 72355536 DFB38715 1C5BBF14 DB3E1B09 C501CA80 40E53CAB   14C51CF5 7C0CF3D7 77689A03 A7B0D487 F3C204B1 B04B1A16 949ABC47 EE8FEF3F   02030100 01A37730 75300F06 03551D13 0101FF04 05300301 01FF3022 0603551D   11041B30 19821779 6F75726E 616D652E 796F7572 646F6D61 696E2E63 6F6D301F   0603551D 23041830 16801440 87E8C3C5 AEB54E65 3D1EAAC6 3E750F9B 20D0F030   1D060355 1D0E0416 04144087 E8C3C5AE B54E653D 1EAAC63E 750F9B20 D0F0300D   06092A86 4886F70D 01010405 00038181 0021106B 6D8BEF59 8B76FC02 47567B64   F75578B1 0C07A0F7 9EC2837A C05969D6 E67A4CFF 3B556972 D8B7EB23 30CAEE8A   F2C1C2AE DC49407D 73770CD6 A2B4FCFF 9CB8F150 FFB07E3D A13620D7 53B314BF   7375DAE3 481C50A5 B7389A6F E3D6461A 5995E149 9AD7003A 8ECEEAFF 2D9310C9   8825213C 7EC87098 82BA2BBA DB018CCF 3E         quit ip source-route ! ! ip dhcp excluded-address ! ip dhcp pool ccp-pool   import all   network   default-router   lease 0 2 ! ! ip cef no ip domain lookup ip domain name no ipv6 cef ! ! multilink bundle-name authenticated chat-script gsm "" "ATDT*99*1#" TIMEOUT 60 "CONNECT" ! ! ! ! ! archive log config   hidekeys ! ! ! ! ! interface Loopback0 ip address ! interface FastEthernet0 ! interface FastEthernet1 ! interface FastEthernet2 ! interface FastEthernet3 ! interface FastEthernet4 no ip address shutdown duplex auto speed auto ! interface Cellular0 ip address negotiated ip virtual-reassembly encapsulation ppp dialer in-band dialer idle-timeout 0 dialer string gsm dialer-group 1 async mode interactive ppp chap hostname ppp chap password 0 wap ppp ipcp dns request ! interface Vlan1 description $ETH-SW-LAUNCH$$INTF-INFO-HWIC 4ESW$ ip address ip tcp adjust-mss 1452 ! ip forward-protocol nd ip route Cellular0 ip http server ip http access-class 23 ip http authentication local ip http secure-server ip http timeout-policy idle 60 life 86400 requests 10000 ! ! ! access-list 1 permit any access-list 23 permit dialer-list 1 protocol ip list 1 no cdp run ! ! ! ! ! control-plane ! banner exec ^C % Password expiration warning. ----------------------------------------------------------------------- Cisco Configuration Professional (Cisco CP) is installed on this device and it provides the default username "cisco" for  one-time use. If you have already used the username "cisco" to login to the router and your IOS image supports the "one-time" user option, then this username has already expired. You will not be able to login to the router with this username after you exit this session. It is strongly suggested that you create a new username with a privilege level of 15 using the following command. username

privilege 15 secret 0



with the username and password you want to use. ----------------------------------------------------------------------- ^C banner login ^C ----------------------------------------------------------------------- Cisco Configuration Professional (Cisco CP) is installed on this device. This feature requires the one-time use of the username "cisco" with the password "cisco". These default credentials have a privilege level of 15. YOU MUST USE CISCO CP or the CISCO IOS CLI TO CHANGE THESE  PUBLICLY-KNOWN CREDENTIALS Here are the Cisco IOS commands. username

  privilege 15 secret 0

no username cisco Replace


with the username and password you want to use. IF YOU DO NOT CHANGE THE PUBLICLY-KNOWN CREDENTIALS, YOU WILL NOT BE ABLE TO LOG INTO THE DEVICE AGAIN AFTER YOU HAVE LOGGED OFF. For more information about Cisco CP please follow the instructions in the QUICK START GUIDE for your router or go to ----------------------------------------------------------------------- ^C        ! line con 0 password temp login no modem enable line aux 0 line 3 exec-timeout 0 0 script dialer gsm login modem InOut no exec transport input all transport output all speed 384000 line 4 exec-timeout 0 0 timeout login response 0 privilege level 0 modem answer-timeout 0 modem dtr-delay 0 activation-character 0 exec-character-bits 8 special-character-bits 8 no exec length 0 width 0 no history no editing transport preferred none transport input none transport output none escape-character soft 0 escape-character 0 no ip tcp input-coalesce-threshold callback forced-wait 0 callback nodsr-wait 0 stopbits 1 speed 115000 line vty 0 4 access-class 23 in privilege level 15 login local transport input telnet ssh ! scheduler max-task-time 5000 end Here is how i tried to get in.  yourname#telnet Trying ... % Connection refused by remote host yourname#

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Re: Trouble getting into AT commands on 881G router

Hello Barry,

please use the attachment file option to post a txt file with your configuration your attempt has produced an unformatted and unreadable text.

Hope to help


Community Member

Re: Trouble getting into AT commands on 881G router

Here is my config and my Show Cellular 0 all

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