ADTRAN 1200153L2, XRT Phone Number Allocation, Single Phone Number Operation, Conference Calling

Chapter 2. Installation

Conference Calling

Conference Calling (also known as three-way calling) permits a conversation between three parties, each at different locations.

During a voice call, the call waiting tone signals a second incom- ing call. Flash-hook to place the first call on hold and answer the incoming call. Flash-hook again to retrieve the first caller. A third flash-hook conferences all three parties.

Automatic Redial

Automatic redial dials the last number dialed. This can be accomplished using a touch-tone phone as follows:

Redial last number: Press ** 5

When connecting to a National ISDN 1 switch, call conferencing and call transferring are assigned a unique feature identifier number. This number may not be the same in all areas. S-registers 90 and 91 contain the feature identifier numbers for conference and transfer. If these features do not work, contact your ISDN provider.

Phone Number Allocation

The Express XRT allocates ISDN phone number 1 to POTS port

1.Connect the primary telephone to POTS port 1 as shown in Figure 2-2.

ISDN phone number 2 is shared by the RS-232 port and POTS port 2, therefore only one can be used at a time.

ISDN data calls and external modem applications must be placed to ISDN phone number 2.

Single Phone Number Operation

For AT&T 5ESS point-to-point lines and other lines with a single phone number, incoming voice calls are routed to POTS port 2 to allow for use of either a modem or a telephone. Service on POTS port 1 is not available.

61200.153L1-13 Express XR/XRT Quick Start Guide 13