-GSM series adopts 2G industrial module and the GSM network standard.

-You can convert the phone card into a telephone line and provide “reverse pole signal”to accurately billing.
-If you are holding encryption card wireless calling card,contact us for technical support to decrypt and upgrade. 

-Can access tel set from outside; set various of functions; facilitate the equipment to do compatibility adjustment.

-Carry with two RJ11 telephone port，easily parallel connect landline,recording box and other similar equipment.

-LCD English display screen, digital visual display signal strength value.

-Telephone box can automatically supply voltage 5V-12V, which can easily apply power for all kinds of security equipment.

-Circuit with anti-jamming design, no noise in the call and other noise, sound clear.

-3 meters pure copper antenna, suitable for some bad signal scene, improve the communication signal.

-Built in watchdog system; when the system doesn’t work,  will automatically restart to prevent crash or other situation.

-Products can optional add an additional built-in battery, suitable for some security and elevators. [**]pplication of the blackout to make the distress call phone.

-Through the external connect telephone button, clear all the parameters and reset it.
-The call volume can be set to avoid the sound is too large to produce an echo.
-The IP prefix can be set by key. Different IP prefix can be provided for local, long distance or international call.
-The DTMF call ring can be set. [**]lso perfectly compatible to solve a variety of caller ID is disappear or incomplete. 

(First ringing and then show the number or the first number and then ring)
-Caller ID supports FSK for special models, through the key settings to take effect. For only support FSK caller ID device.
-Can be set to prohibit incoming calls. Can be set an incoming call list or an incoming blacklist.
-Can set the second dial mode and automatically use it to outgoing call.

 (The second dial mode does not provide an accurate "reverse pole" signal.)
-Partial custom models can support the key setting in 12K or 18K billing signal mode.
-Can be set the phone box comes with the screen or external telephone screen display device communication module IMEI.
-Can manually modify IMEI of module and offer the specified phone IMEI for the particular application.
-Can be set to "take up time", "busy tone time" to adapt special equipment applications in ideal compatibility.

★ Cooperation with the telephone recording box: through RJ11 port to match up with wired telephone recording box and achieve the outgoing recording, incoming screen popup and so on through phone card. 

★ Cooperation with analog voice board: through RJ11 telephone wire to connect the analog voice board, through the phone card  to provide "anti-polar signal" telephone line for the voice card, and alternative operators telephone line (PSTN). 

★ Cooperation with call center software to achieve through the phone card access call center system and various applications.

★ Cooperation with pbx: through RJ11 telephone line to connect PBX, which through the phone box to call out. When phone is on, FWT will provide the "reverse pole signal" to inform pbx. [**]t the same time, it will provide a caller ID to pbx. [**]gainst for mostly telephone lines can not provide "reverse pole signal", resulting in part of pbx function can not be used. What's more, some of the mobile phone cards cost low tariffs, it  provides more cheap choice of communication charge for enterprise pbx customers.

★ Cooperation with the traffic telephone: telephone line can be connected to the call center dedicated telephone, through traffic telephone to outgoing call. The caller ID will be displayed when the phone is connected. 

★ Cooperation with the wireless fixed-line card application: part of the fixed wireless card need to use a dedicated decryption card stickers. Part of the area can be customized built-in key to achieve the use of decryption stickers.

★ Cooperation with ordinary landline telephone: through the telephone wire to connect ordinary landline telephone, the equivalent of a "wireless fixed platform"; can easily achieve incoming, outgoing call, caller ID and so on.