GSM_FWT

etailed Product Description Provide accurate reverse polarity billing signal Display Caller ID Add prefixed code automatically: The telephone setting can be set up to add the local area code when dialing local fixed calls and add IP prefixed code when dialing long-distance calls. Locking wireless terminal, locking SIM card, locking service provider and locking districts. Network Management Parameter management: Parameters can be modified by hand via the connected telephone. Telephone code management: Barred telephone number and directly transmit telephone number Resume parameters: All the parameters can be set up to be the default status when it is necessary Set up or cancel call diverting Support PBX Adjusting the volume of voice: microphone volume and speaker volume can be adjusted separately.