ZETRON 2000 Series Specifications download pdf (Page 153)

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Modem Card (802-0041)

A 9600 baud modem on this circuit card provides the dial-up remote port for Zetron

maintenance of the 2000 Series system. Two RJ-11C connectors on edge of the card

provide convenient connection points for the input telephone line and a bridged telephone.

Software on the CPU card constantly polls the modem card for any incoming telephone

call and connects the Zetron maintenance staff computer to the paging terminal diagnostic

software system. The communications protocol used on this port is Zetron proprietary and

therefore inaccessible to any “normal”, off-the-shelf, communications software packages

that may attempt to invade the system. The pinout of the modular connector labeled “to

Line” is shown in Table 17.

Table 19: Modem Card (802-0041) “Line” Pinout

SCSI

SCSI stands for “Small Computer System Interface”; it is commonly pronounced as

“skuzzy”. It is a high speed, industry standard interface used to access the Series 2000 disk

drive for storage.

Current Model 2100 systems use only one disk drive regardless of size (unless voice

mirroring is used). For all Model 2100 systems (and Model 2200 systems with less than

six hours of voice storage), there is a single hard disk system on a card, in slot 1. We make

this disk system by mounting a SCSI host adapter, a 3.5" SCSI drive, power, and SCSI

cables on a metal frame. This assembly is sometimes referred to as the “Zetron hard card.”

For larger voice storage systems in Model 2200, instead of a hard disk system on a card,

the SCSI controller on the Pentium CPU card is used. Thus, there is still a single disk drive

in the system, but the physical mounting is different due to the larger, heavier drives.

Zetron preformats any hard disks or spares sent with your system. Most of the disk is

partitioned for our proprietary voice storage system for high-speed access to voice files.

The boot part of the disk is a DOS partition, with the programs and configuration files

necessary for your particular configuration. DO NOT attempt to format the drive yourself.

Pin # Signal Name Purpose

1not used

2 A Key system busy circuit lamp for RJ-12

3 Ring Telco “Ring” wire

4 Tip Telco “Tip” wire

5 A1 Key system busy circuit lamp for RJ-12

6not used

1 2 ... 148 149 150 151 152 153 154 155 156 157 158 ... 375 376

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ZETRON 2000 Series Specifications Page 153