Description
Phoenix Microsystems 1500-250 RS-232 Interface Module DCE DTE BERT Tester
The Phoenix Microsystems 1500-250 is a benchtop RS-232 interface module and communications analyzer designed for testing, monitoring, and switching between DCE and DTE devices on RS-232 serial links. Known as the Model 1500 COMIT, it provides full EIA-CCITT RS-232 signal monitoring with an integrated alphanumeric keypad and LCD display, allowing technicians to observe line status, inject errors, run BERT (Bit Error Rate Tests), and control signal states — all from a compact, self-contained instrument. The unit is manufactured by Phoenix Microsystems Inc. of Huntsville, Alabama.
Specifications & What's Included
- Model: 1500-250 (RS-232 Interface Module — TO DCE / TO DTE)
- Family: Model 1500 COMIT (Phoenix Microsystems)
- Interface Standard: RS-232 / RS-232C, EIA-CCITT
- Operating Modes: DCE and DTE switching
- Signal Monitoring: Full EIA-CCITT RS-232 signal set — TD, RD, RTS, CTS, DSR, DCD, DTR, TC, RC, SQ, RI and more
- LED Indicators: Per-signal LED array for DCE and DTE lines, plus voltage indicators (+12V, -12V, EV1, EV2) and RED/GRN Mark/Space/Pos/Neg indicators
- Built-in Functions: BERT (Bit Error Rate Test), ERR INJ (Error Injection), SYNC, RECOV, TRIG, POLL, DV TEST, ECHO, BIAS, FORMAT, TRAP, RESULT INC/DEC, ADD INC/DEC, SYNCBRK, DSP CLR, SYNC CLR, TRAP END, TRAPRIG, TRAP ST
- Display: LCD window with alpha/hex display modes
- Keypad: Full alphanumeric keypad (A–Z, 0–9) plus dedicated function keys
- Rear Connectors: RS-232C Control Port (DB-25), EXT CLOCK BNC input
- Power: AC 2 AMP
- Form Factor: Benchtop / portable desktop enclosure
- Manufacturer: Phoenix Microsystems Inc., Huntsville, Alabama
- Included: Unit only; no accessories or cables included
Applications
The Phoenix Microsystems 1500 COMIT series was used by telecommunications engineers, field service technicians, and data communications labs for troubleshooting and qualifying RS-232 serial links between data terminal equipment (DTE) and data communications equipment (DCE) — such as between a computer or terminal and a modem, multiplexer, or other serial device. The integrated BERT function allows measurement of bit error rates on live circuits, while the error injection capability enables stress testing of communications links and connected equipment. The EIA-CCITT signal chart printed on the front panel maps every RS-232 signal line by name, function, and circuit number, making it a practical reference tool during installation and troubleshooting. Instruments like this were common in telecom central offices, university computing centers, and industrial data communications environments during the 1980s and early 1990s, when RS-232 serial connections were the dominant standard for connecting peripherals, modems, terminals, and industrial controllers. RS-232 test and breakout equipment of this type continues to see use today in legacy industrial control, embedded systems development, and anywhere RS-232 serial interfaces remain in service.
This Phoenix Microsystems 1500-250 RS-232 Interface Module has been inspected and is in good used condition. It was pulled from a working environment where it was in active use and functional. The enclosure shows typical handling wear — scuffing and light scratches on the blue metal housing, with some paint loss visible on the corners and edges. The front panel keypad, LCD window, and signal indicator area are intact. The rear RS-232C Control Port DB-25 connector and BNC EXT CLOCK input appear undamaged. Please view our photo set and contact us if you have any questions.
Warranty Information
Additional Information
Brand: |
Phoenix Microsystems |
Model: |
1500-250 |
MPN: |
1500-250 |
Secondary Model: |
1500-100 |
Type: |
RS-232 Interface Module / BERT Tester |
SKU: |
47912 |
Interface Type: |
RS-232 / RS-232C, EIA-CCITT |
Connector Type: |
DB-25 (RS-232C Control Port), BNC (Ext Clock Input) |
Communication Mode: |
DCE and DTE |
Function: |
RS-232 Signal Monitor, DCE/DTE Switch, BERT |
Features: |
BERT, ERR INJ, SYNC, RECOV, TRIG, POLL, DV TEST |
Display: |
LCD display with alphanumeric keypad |
Power Requirements: |
AC 2 AMP |
Form Factor: |
Benchtop / Portable |
Country/Region of Manufacture: |
United States |
Manufacturer Location: |
Huntsville, Alabama |
Condition: |
Used – Pulled from Working Environment |
Seller Notes: |
Unit only; pulled from working environment. No accessories included. |
Condition Notes: |
Phoenix Microsystems 1500-250 RS-232 Interface Module. Used, pulled from a working environment where it was in active use and functional. Inspected; good condition with typical wear on the blue metal housing. No accessories included. |
