GP-550 Bluetooth Fixed Terminal Trunk Switch For 3G/GSM Mobile

1. Voice is transmitted on the trunk that connect PBX phone
    with Bluetooth cell phones.
2. GP-550 pairs with Bluetooth cell phones to use directly,
    it doesnt relate to telecommunication provider and frequency.
3. Could pair with 4 cell phones and dial out or receive calls via
    one cell phone at the same time.
4. Just use phone to dial, it can be far away from the electromagnetic
    wave.          
5. The calling will pass to PSTN automatically when power down,
    cell phone is unpaired or out of range.
6. Digital volume and it adjusts volume and gains.
7. Bluetooth has functions of pairing and searching automatically.
8. Transmit high quality voice.
9. It is compatible with GSM/CDMA/3G/WCDMA Bluetooth cell phones.
10. 30 Database and can set prefix to determine which paired
      cell phone will dial out.
11. Database has functions of adding or subtracting code automatically,
      and user isnt necessary to change habit of using the table phone.
12. Speed Dial function.

Feature:

GP-550 is a device that special design for saving your telephone expenses.
This device could provide 4 ports of communication line which offer you a great ability
and flexibility to save expenses when you need to use desk phone to call out
to cell phone.
GP-550 build in Bluetooth technical, user can take Bluetooth cell phones to
work with this device, and user could get the most flexible when need to communicate
to different cell phone service provider.
GP-550 can set 4 paired cell phones which are waiting for to be connected, and can
determine which paired cell phone will dial out according to the prefix numbers
user dials.
That means could use that cell phone via the service provider to dial out.

GP-550 can set four paired cell phones and can auto choose the best trunk