ADCP-50-304 • Issue 19 • June 1999 • Section 2: Functional Description

The cable connectors are 9-pin, D-subminiature. Both end-connectors are male. The cable may be up to 1,000 feet in length. Connector pin assignments are detailed in Table 2-1.

Table 2-1. Communications Channel Connector Pin Assignments

SIGNAL NAME

PIN NUMBER

DIRECTION OF SIGNAL

TD +

6

Input

TD –

7

Input

 

 

 

RD +

2

Output

RD –

3

Output

 

 

 

CTS +

4

Output

CTS –

5

Output

 

 

 

RTS +

8

Input

RTS –

9

Input

 

 

 

GRD

1

Ground

 

 

 

Each PS chassis contains two female 9-pin D-subminiature connectors wired in parallel. A cable connects one PS chassis to another in daisy-chain fashion. A long cable connects the remote control device to the first (or last) PS chassis in the chain. Up to 16 PS chassis may be interconnected via the communications cable to a remote control device.

All transmissions between the PatchSwitch Control Module and the remote control device must use the ASCII character set. The PS chassis is a DCE device and has the following data transmission characteristics:

1.Speed of 1200 bits per second

2.Asynchronous transmission

3.Bit-serial ASCII data (8 bit no parity)

4.One Stop bit.

During normal operations, only one (of the possible 16) PS chassis CM may transmit on the communications channel at one time. When a PS Chassis is selected by the remote control device, all other PS chassis connected on the same channel are disabled (de-selected). All manual controls on a CM are always functional.

With the CM strapped for dc pulse control, the CM provides capability to bank switch PS chassis modules by application of 0V (GND), +5V or –5V to –48V dc voltage levels on the 9-pin D- subminiature connector. The connector pin assignments are detailed in Table 2-2.

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© 1999, ADC Telecommunications, Inc.