AT&T AT&T manual Wiring, 218

Calls from STARLAN NETWORK to System 25

A STARLAN NETWORK workstation accesses a host computer connected to System 25 (either a local host or a remote host that can be reached using the Modem Pooling feature).

1. The STARLAN NETWORK workstation loads CLIENT and NAUCOM and then CAM software (discussed in the Communications Access Manager Program feature description) and selects a directory entry for the host.

2.CAM communicates with the STARLAN CP to place the call.

3.After a connection message is received, CAM automatically switches to terminal emulation (data) mode.

4.The user may now log into and converse with the remote host.

5.To disconnect, the user selects the CAM disconnect command.

Flow Control

Software flow control (XON/XOFF) may be enabled or disabled by System 25 data endpoints. After the “STARLAN Address” prompt is returned to the user, a CONTROL-X may be entered instead of a logical name. The user will be prompted further to enable or disable flow control. After that, the user is again prompted for a STARLAN address. This option also works for calls from the STARLAN NETWORK to System 25.

Data Call Disconnect

Data calls may be disconnected at either endpoint. Connections are dropped through the normal disconnect procedures of each network. If a failure in the established connection occurs, call disconnections are initiated from both sides.

Third-Party Call Setup

A data terminal (on System 25) or workstation (on the STARLAN NETWORK) can set up a call between two other stations (voice or data) using the Third-Party Call Setup feature. Since voice port/data port associations are not meaningful for STARLAN CP ports, STARLAN NETWORK workstations must always specify the Personal Dial Code of the source voice terminal or the Data Dial Code of the source data terminal. Note that this feature can only be administered for the STARLAN CP ports as a group, and not for individual STARLAN NETWORK workstations.

When placing voice calls using CAM, Third-Party Call Setup is used automatically.

Wiring

The STARLAN NETWORK wiring plan is based on standard 4-pair building wiring. The STARLAN NETWORK uses two pairs of the 4-pair cable, allowing the remaining two pairs to be used for voice service. STARLAN NETWORK data is transmitted over pairs two and three. Figures 2-43and 2-44provide typical connection information.

AY-adapter may be used to combine/split the pairs at the System 25 cross-connect field. STARLAN NETWORK NAUs provide an RJ11 phone jack that terminates pair 1. Single line sets may be plugged directly into this jack (Figure 2-43).MERLIN Communications System sets require an ATL adapter and local power (Figure 2-44).

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