SRX 210 Services Gateway 3G ExpressCard
Wireless WAN access is becoming widely available and price-comparable to ISDN and DSL. The SRX 210 services gateway provides support for a wireless interface as a backup.
To facilitate wireless connectivity, the SRX 210 services gateway has a 3G port with an ExpressCard USB interface.
Using the 3G ExpressCard
There are two types of 3G ExpressCards supported in the services gateway. The 3G GSM/CDMA cards supports HSDPA (880EU) and EV-DO (597EU) modems. The ExpressCard is plugged into the 3G ExpressCard slot and a wireless call is dialed to the 3G Wireless service provider network, that acts as a gateway to the internet.
In order to use the 3G ExpressCard as a back up interface, you can make use of the dialer feature available in the services gateway.
Note: Only Sierra 3G ExpressCards are supported.
The 3G ExpressCard provides the following key features:
- On-board SIM — All GSM cards have an on-board SIM. The ISP populates this SIM with the subscriber service parameters.
- On-board NVRAM — The CDMA cards have an on-board NVRAM.
Note: Hot insertion and removal of the 3G ExpressCard is not supported.
- Activation of new cards through the CLI — CDMA ExpressCards can be activated from the JUNOS CLI.
- Unlocking ExpressCards — GSM ExpressCards can be unlocked from the
JUNOS CLI. The GSM cards can be unlocked before activation.
Note: Locking / unlocking is supported only for GSM cards.
- Interface support — The IP over PPP interface is supported across the USB ExpressCard interface and from the network via the wireless link.
- Dial-out support — The dialer interface is used to place calls
and has multiple features like dial-backup, dialer-watchlist and dialer-filter.
In this case, the ExpressCard functions as a subordinate.
Note: Dial-in is not supported on the 3G ExpressCard.
- Card information availability— You can obtain information on the ExpressCard, such as type, version, wireless status, and user profiles.
- Security — The card supports a PIN lock to prevent unauthorized access
and use of the wireless account. You can enable or disable the SIM
lock and unlock a locked SIM using the request commands. You have
the option to store the PIN code you provide in the services gateway
configuration information, so that the SIM can be unlocked without
user intervention on each reboot/reset on the box.
Note: Currently, PIN-protected SIMs are supported for all GSM cards.
The 3G ExpressCard has the following physical parameters:
- Standard ExpressCard with 34 modules
- Width — 34 mm
- Thickness — 5 mm
- Connector Pins — 26
- Max power consumption — 1.3 W
- Voltage supply — 3.3V (primary source) and 1.5V (secondary source)
Basic CLI Commands for 3G ExpressCard
To enable locking in GSM sim cards, use the following command:
request modem wireless gsm sim-lock cl-0/0/8 enable pin <pin number>
Note: After enabling the sim lock, the 3G ExpressCard continues to be in unlock state until it is reset either by power recycling the services gateway or by plugging out and reinserting the card back in to the device and rebooting the device.
Unlocking sim card
To disable sim lock, i.e. to remove the security on GSM sim cards, use the following command:
request modem wireless gsm sim-lock cl-0/0/8 disable pin <pin number>
Recovering sim card from puk state
While unlocking the sim if you continuously enter a wrong pin for 3 times, it will enter puk state. To recover the sim back to normal, use the following command:
request modem wireless gsm sim-unblock puk <puk pin number>pin<New pin number>
Note: PUK needs to be obtained from the cellular service provider.
Changing the PIN
To change the pin on the sim card, use the following command:
request modem wireless gsm change-pin cl-0/0/8 old-pin <current pin>new-pin <new pin>
Checking the status of the 3G ExpressCard
To check the status of the 3G ExpressCard, use the following command:
show modem wireless interface cl-0/0/8