17
CHAPTER 2: Introduction
The RS-232 IN port is a DB9 male connector pinned as an RS-232 DTE port. It’s
only used when multiple Caller ID units are daisychained together; it receives
information from units farther along in the chain. The RS-232 IN port is pinned
this way (see the Note on the previous page about the Busy signal on Pin 9):
Pin
Signal
Direction
2
Receive Data (RD)
In (from other Caller ID unit)
5
Signal Ground (SGND)
N/A
7
Request to Send (RTS)
Out (to other Caller ID unit)
8
Clear to Send (CTS)
In (from other Caller ID unit)
9
Busy
In (from other Caller ID unit)
2.4 The Complete Package
Each 4-Line Caller ID comes with:
• (2) Condenser cables with two RJ-11C plugs at one end and one RJ-14C plug at
the other end.
• Power supply.
• This manual.
Each 8-Line Caller ID comes with:
• (1) Standard phone cable with RJ-11C plugs at both ends.
• Power supply.
• This manual.
If anything is missing or damaged, call Black Box. Also notify the shipping carrier if
any damage appears to have occurred during shipping.
Summary of Contents for TE120A
Page 13: ...12 4 AND 8 LINE CALLER ID Figure 2 3 Signal flow with a 4 Line Caller ID TE120A ...
Page 14: ...13 CHAPTER 2 Introduction Figure 2 4 Signal flow with an 8 Line Caller ID TE121A ...
Page 15: ...14 4 AND 8 LINE CALLER ID Figure 2 5 Signal flow with multiple 4 Line Caller IDs TE120A ...
Page 16: ...15 CHAPTER 2 Introduction Figure 2 6 Signal flow with multiple 8 Line Caller IDs TE121A ...
Page 29: ...NOTES ...