eCallDirect FAQ 

eCallDirect is a patent-pending service from Aeris that establishes a voice circuit—without human dialing—in response to emergency situations or as needed to respond to infrequent events.

eCallDirect is used to establish voice calls in emergency situations.

For example, if a home alarm is triggered, eCallDirect can contact a Security Central Station and open a voice channel with emergency responders, who can verify whether the event is a false alarm or genuine emergency.

If a vehicle is involved in an accident or needs roadside assistance, a device in the vehicle can use eCallDirect to contact a Telematics Service Provider and open a voice channel between emergency responders and the vehicle occupants.

eCallDirect is for rare or emergency situations only. It is not for standard phone calls.

eCallDirect runs over CDMA. To use eCallDirect, wireless devices must use Aeris-approved RF modules.

eCallDirect is available throughout the Aeris CDMA footprint.

eCallDirect MINs are not dialable numbers. They are in area codes 175-178, which are not used for standard voice numbers on the PSTN. This adds security since the eCallDirect calls must go through the Aeris switching center.

Yes, a CDMA wireless device can use eCallDirect for a voice call with emergency responders even while the device is also using SMSDirect for data communication with a commercial application. However, simultaneous eCallDirect calls and MicroBurst messages cannot be supported, because they leverage the same technology.

Typically, a voice circuit set up using eCallDirect can be set up in less than 12 seconds.

eCallDirect supports both MO (Mobile-Originated) calls, which are calls initiated by a device in the field, and MT (Mobile-Terminated) calls, which are calls initiated by a commercial application.

MO calls can be completed to the number dialed or redirected to a new number under the control of the commercial application.

The commercial application receives a TLDN (Temporary Location Directory Number) from the Aeris switching center to establish a voice circuit with a device. Since Aeris numbers are not dialable, this provides controlled, secure access to devices.