ADTRAN ISU 128 User Manual download pdf (Page 39)

Chapter 6. Configuration

24 ISU 128 User Manual 61202.029L2-1

Figure 6-2

VT 100 Configuration Screen

Switch Protocol

Find out what kind of ISDN switch your local CO is using by asking the tele-

phone administrator or telephone company representative. Configure the ISU

128 for either a Northern Telecom DMS-100

, AT&T 5ESS

switch, or a switch

conforming to the National ISDN-1 standard (usually an AT&T 5ESS, NTI

DMS-100, or Siemens EWSD). In the Far East, configure for the NEC switch.

Call Type

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.

When placing outgoing calls using the optional V.34 modem, the unit must be op-

tioned for either speech or audio call type.

Speech

Speech directs the call control software to request a Mu-law/A-law speech cir-

cuit 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 costs

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ADTRAN ISU 128 User Manual Page 39