ADTRAN 61200051L1, 1200051L6, 1200051L2, 1200051L5 user manual Setting the Call Type

Chapter 6. Configuration

Setting the Call Type

Call type is configured for both DTE#1 and DTE#2. When using the front panel, select the appropriate DTE with either arrow key and press Enter. When using a VT 100 terminal, select the option number corresponding to the appropriate DTE and press Return.

The Call type can be configured four different ways, depending on the type of service used: Speech , Audio, Data 56 kbps, or Data 64 kbps.

Speech

Speech directs the call control software to request a Mu-law (or A-law) speech circuit as the bearer capability for outgoing calls. The Speech option is used with an ISDN line configured for voice service. In some areas voice service is less expensive than data service. A Speech call type does not guarantee an end-to-end digital connection with some local and long distance carriers.

Audio

Audio directs the call control software to request a 3.1 kHz audio circuit as the bearer capability for outgoing calls. The Audio option is used with an ISDN line configured for voice service. In some areas audio service is less expensive than data service. Selecting Audio guarantees a digital end-to-end ISDN connec- tion.

Data 56kbps

Data 56kbps directs the call control software to request a 64 kbps data circuit that is rate-adapted to 56 kbps. Data 56 kbps is intended for use in circumstances where interoperability with Switched-56 service is desired.

Data 64kbps

The default Call type for ISDN service is Data 64 kbps. This directs the call control software to request an unrestricted 64 kbps circuit.

61200051L1-1D ISU 2x64 Dual Port ISDN Service Unit User Manual 31