Customer Reviews

Mini Null Modem DB9 Female / DB9 Female, Adaptor

5 star:		(7)
4 star:		(0)
3 star:		(1)
2 star:		(0)
1 star:		(11)

 

 

Product would have been fine if i needed a gender changer, but I ordered a null modem adapter and the tape around the connectors said it was but the pins were all straight connections. I bought this so I wouldn't have to dig out an old 20' null modem cable but had to resort to that all the same since this didn't give me the cross talk like i needed.

I ordered two of these adapters, and after scratching my head trying to figure out what I was doing wrong I rang out the pins with a Multi-Meter and discovered that they were wired straight through. Namely, pin 2 goes to pin 2 and pins 3 goes to pin 3. They work great as F/F adapters though.....

Despite what the description says and as some of the other reviewers have pointed out... this is NOT a null modem adapter, it is just a straight-through F/F gender changer. Pin outs are exactly the same on each side. (Wondering if the picture in the description is wrong as it shows an orange band around the adapter yet the one I received has a bright yellow band that states: "Mini Gender Changer".)

This has worked well for me to extend a connection from a fire alarm system to a monitoring station. It was durably constructed and performed as advertised.

Works:

I've verified that these correctly function as null-modem adapters. Also, in the batch of about 20 that I ordered, none of the ones I received are duds.

Great price:

Consumer retail null-modem adapters are often roughly $10 or so. I was very grateful to find this item for such a low price.

In fact, due to the low price and low weight, I ordered a couple dozen. The S&H only increased slightly between quantity of 1 to a quantity of 20, which makes sense because these are so small.

Simplifies life:

Because of this slim Null Modem adapter, I no longer have to guess whether a serial connection between two devices requires a null-modem cable or not. Instead, I just use a plain serial extension cable, and then if the connection doesn't work right away (or, for a dead givaway, one side of the connection is male-male), popping this adapter right in the middle is a quick and easy solution.

I was pleased with the null modem adapter. I was concerned that it should meet the standards for a null modem cable, but after testing all the pin to pins, I found it made all the right connections. This is a handy adapter to go along with the modern USB to male DB9 cables used for serial communication. Adding this adapter makes the overall cable a regular null modem cable.

I have verified that the item I received is a null modem and not a gender changer. I have the DB9<->DB9 F<->F and it works fine.

Don't buy these, they aren't a null modem adapter! They are labeled as a null modem adapter but they are actually wired straight through. The seller is doing nothing about it as is illustrated by all of the negative reviews.

DB9 female null modem adapter works as a NULL modem cable.
Connected two regular DB9 serial cables together and it functions as if one of the cables were a null modem cable.

This is NOT a null modem adapter! It arrived with a "null modem" sticker on it, but the connector is just a gender changer with straight through connections.