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- Path: earth.superlink.net!usenet
- From: tommy@superlink.net (Tom Snyder)
- Newsgroups: comp.dcom.modems
- Subject: Re: COURIER HAS CALLER ID!
- Date: Sat, 02 Mar 1996 18:25:57 GMT
- Organization: SuperNet Inc. (908) 828-8988
- Message-ID: <31388307.4471114@news.superlink.net>
- References: <31287075.1286167@news.insync.net> <Dn1MzE.1pM@freenet.carleton.ca> <4gf98v$vnc@mips.pfalz.de> <4gg1mn$juh@shellx.best.com> <31328bea.27542306@news1.star.net> <4h05u9$ao6@shellx.best.com> <31363186.1093073@news.frontiernet.net>
- Reply-To: tsnyder@eclipse.net
- NNTP-Posting-Host: 207.17.173.68
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-
- brianb@frontiernet.net (Brian) wrote:
-
- >
- >>no.. not for caller id. the single board version of the courier
- >>v.everything will support caller id and cnid with just a new flash
- >>the older daughterboard version needs a slight hardware modification
- >>
- >
- >Any Idea just what this simple hardware mod is? Anyone out there know?
-
- HUGE DISCLAIMER - I know nothing about electronics. I'd probably burn
- myself pretty badly if I tried to use a soldering iron. I have no idea
- if what follows will work or if it will blow up you modem. The risk is
- all yours. Don't blame ME for anything as I'm just the messenger of the
- information, I didn't write it.
-
- The following was found in the Fidonet USR echo and was posted by the
- moderator (who I don't think was the author of it either)...
-
- Here are the plans;
- USRobotics Courier modular modems - Caller ID Hardware Mod
- --------------------------------------------------------------------
-
- The USR Courier V.Everything modem can be upgraded to include Caller ID
- capability with a simple flash ROM upgrade. Unfortunately, this only
- works with the newer single-board design models. The older modems that
- were upgraded to V.Everything by daughterboard swap are missing 2
- components on the MOTHERBOARD that are needed to allow Caller ID to
- operate. Adding these 2 parts is a very simple and inexpensive
- procedure. Soldering is required. If you aren't any good at it, find a
- friend who is. The 2 parts are standard Radio Shack catalog items
- costing about a dollar each. This modification will void your warranty
- and violate the device's FCC certification. Use it at your own risk.
- THIS MODIFICATION IS ONLY NEEDED FOR THE MODULAR-DESIGN MODEMS THAT USE
- A DAUGHTERBOARD! Of course, you must first order Caller ID service
- from your phone company, and you must install the Flash ROM upgrade.
-
- Parts needed:
-
- (1) Resistor, 10K ohms, 1/4 watt
-
- Any garden-variety carbon resistor will work just fine.
-
- (1) Capacitor, .033 uF, 200 volts minimum
-
- Old-fashioned ceramic disk parts should be OK, but a mica or
- polyester part would be preferred. Do not use any sort of
- polarized or electrolytic part. Capacitors must be rated
- at 200 volts or better!
-
-
- Solder one lead from each part together, connecting them in series.
- Keep the lead lengths short, the parts should be close together.
- Polarity does not matter.
-
- Solder here and
- trim leads short ---> X
- /X\
- / \
- / \
- --- ---
- | | | |
- | | | |
- | R | | C |
- | | | |
- | | | |
- --- ---
- | |
- | |
- | |
- | |
- | |
- | |
-
-
- There are 2 different circuit board layouts for the USR motherboard.
- The location that you will install this little circuit depends on
- whether you have the REV "E" motherboard or an earlier one. The REV
- "E" motherboard is easy to spot because of the "REV E" etched into the
- board at the front corner, between the end of the volume control
- slider, and the front panel push-switch. Also, the REV "E" board has
- the speaker located in the rear, near the serial port connector. On
- earlier boards, the speaker is located more towards the middle of the
- board.
-
- In either case, the R-C circuit needs to be installed so that it
- jumpers 2 pins on one of the motherboard chips. This is a small 6-pin
- chip that is used as a solid-state hookswitch relay. On the REV E
- boards, the chip is an LH1500 or XCA111, and is designated U11. On
- earlier boards, the chip is an LH1056, and is designated U8.
-
- In both cases, the chip is located near the DIP switch block. Look
- at the silk-screened lettering on the board, and you will see that all
- the component locations are marked. Just look for U8 or U11 as
- needed, and make sure the part number stamped on top of the chip matches
- the ones listed here.
-
- Pins 4 and 6 of this chip are the "relay contacts". Solder the free
- ends of the series R-C circuit across pins 4 and 6 of the chip. It
- doesn't matter which end goes where, as long as the circuit is
- "jumpering" those 2 pins.
-
- BEFORE SOLDERING, BEND AND TRIM THE LEADS TO MAKE THEM AS SHORT AND
- NEAT AS POSSIBLE. AVOID SPILLING SOLDER ALL OVER THE PLACE, AND DON'T
- OVERHEAT ANY OF THE COMPONENTS!
-
-
-
- Top view of chip The chip will have a notch or a dot molded
- into the plastic to indicate the location
- of pin #1.
- ----\/----
- |* |
- 1 --| |-- 6 <------\
- | | \
- | LH1500 | \
- 2 --| LH1056 |-- 5 ------ The R-C circuit "jumpers"
- | XCA111 | / these 2 pins. (4 and 6)
- | | /
- 3 --| |-- 4 <------/
- | |
- ----------
-
-
-
- That's all there is to it! Now put the modem back together, load the
- Caller ID flash rom, and you're in business. Don't forget that Caller
- ID info comes in between the first and second rings, so you have to set
- up your software to allow 2 rings before answering! And be sure that
- you reset all the factory settings with AT&F1&W. The Caller ID flash
- rom adds new s-registers to the modem, and these will contain "garbage"
- values until you do the complete reset.
-
- If the Caller ID detection is unreliable, you can try changing the
- values of the 2 components. Resistor values can range from 1K to 100K
- and capacitor values range from .0033 to .047 uF. Try various
- combinations to see what works best for you.
-
- THIS MODIFICATION IS NOT NEEDED ON THE SINGLE-BOARD MODEMS! The newer
- design uses a real mechanical relay, and it already has these 2 parts
- installed across the relay contacts.
-
- -----------------------------------------------------------
- Tom Snyder
- (No, not the television talkshow host)
- tsnyder@eclipse.net tommy@superlink.net
- -- Every thought's a possibility --
- -----------------------------------------------------------
-