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Please Explain the show cellular info Command in Detail

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Post time 2017-5-4 18:50:37 | Show all posts |Read mode
Please Explain the show cellular info Command in Detail
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 Author| Post time 2017-5-4 18:51:17 | Show all posts
The show cellular info command can be used to display the current state of the system. Use WCDMA as an example.
show cellular info
Tty No.:  1     /* tty number, which is consistent with the corresponding async interface number*/
Slot:   2      /*Number of the slot where the SIC-3G line card is located*/
Interface: Async 1     /*Corresponding 3G port*/
3G Type:  WCDMA /* Type of the 3G card, that is, 3G network type supported by theSIC-3G card*/
RSSI:-69 dBm        /* Current RSSI value; a greater value indicates higher signal strength */
Sys mode: WCDMA(5)        /* Work mode ofthe SIC-3G card */
Sim status:     Valid USIM card state(1)
Service status: Valid service(2)
Roaming status:  Non roaming state(0)
Service domain: PS+CS service(3)
Available PLMN's:
List 1: Status = Registered ,SP name =China Unicom, Network = WCDMA
List 2: Status = Available  ,SP name = China Unicom, Network = GSM/GPRS

Explanation:
(1) RSSI
RSSI generally ranges from –85 dBm to –51dBm. A signal reception of –61 dBm is stronger than that of –85 dBm. Because 3G antennas have unstable signal reception and the AT command is refreshed every28s, you need to run the AT command at an interval of at least 28s to obtain the latest results.

(2) Output items of Service domain:
Service domain indicates the service domainof the system.
No service: Indicates that services are unavailable.
Only CS service: Indicates that only Circuit-Switched services (voice services, such as making and receiving calls) are available.
Only PS service: Indicates that only Packet-Switched (PS) services (data services, such as data upload and download) are available.
PS+CS service: Indicates that voice and data services are available.
CS and PS not registered, searching:Indicates that the user is connecting to a 3G network and has not completed voice or data service registration.

(3) Output items of SIM status:
SIM status indicates the status of a SIM card.
Invalid USIM card state or pin code locked:Indicates that the SIM card is invalid.
Valid USIM card state: Indicates that the USIM card is valid.
USIM is invalid in case of CS: Indicates that the USIM card is invalid in the CS domain. That is, the card user cannot make and receive calls or use other voice services.
USIM is invalid in case of PS: Indicates that the USIM card is invalid in the PS domain. That is, the card user cannot upload and download data or use other data services.
USIM is invalid in case of either CS or PS:Indicates that the USIM card is invalid in the CS and PS domains. That is, the user cannot use voice and data services.
USIM card is not existent: Indicates that the USIM card does not exist.

Description of PS and CS:
The 3G core network is divided into the CS domain and PS domain. When a user accesses the network, the user will register with the PS or CS domain based on service requirements.
The CS domain provides voice services. After CS registration, the user can make and receive calls.

The PS domain provides data services. AfterPS registration, the user can perform data transfer (such as download) and use other multimedia services.

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