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apcmag.com  june 06  apc labs

apc labs  june 06  apcmag.com

softwaresoftware

2006

JUNEDETAILED PRODUCT REVIEWS AND COMPARISONS

REVIEWS

BEST BUYS

LABS CHALLENGE

labs

hat was obvious in our testing

of this year’s modems was

that some manufacturers that

performed very badly last year —

notably Zyxel — have been

improving their performance. The

same Zyxel Prestige P2602HWL that

topped-out at an embarrassing

9.4Mbit/s transfer rate last year

performed better this year,

achieving a more respectable

13.5Mbit/s throughput (against a

line sync speed of 20.1Mbit/s).

Likewise, Netcomm has sorted

out the shambles that was its NB5

modem (sold as “upgradeable” to

ADSL2+… which Netcomm later

revealed would require a hardware

upgrade with an attached fee.)

To its credit, following negative

publicity, Netcomm agreed to cover

all costs including postage (and

upgraded the modems free of

charge). The NB5Plus4 variant we

tested (an NB5 with four Ethernet

ports) wasn’t a speed demon, but it

had competitive performance: it

was tenth fastest at 14.4Mbit/s on

the 1km line-length.

Another obvious example of

performance improvement was

Netgear’s DG834 modem/router.

Even though we asked all the

modem manufacturers to submit

their review samples with the latest

ADSL2+ firmware installed,

Netgear’s DG834 came with a very

old version (1.05.00). We upgraded

to the latest version (3.01.25) and

the modem’s sync speed

immediately gained 6Mbit/s.

Many people probably never think

to check if there’s a newer version

of their modem’s firmware.

However, modem manufacturers

frequently release updates, and

often the Australian branches of

modem makers offer Australian

firmware versions that are tweaked

to match the characteristics of the

most widely deployed ADSL2+

DSLAMs in Australian ISPs.

MODEMS THAT WE

CAN’T RECOMMEND

One modem that turned in a bad

performance last year was Draytek’s

Vigor 2800. When we originally

tested it, Draytek said its poor

performance was due to beta

firmware. This year, we had trouble

getting the modem to connect at

all to our test DSLAM (which was

locked to use ADSL2+ only). It

turned out that Draytek had sent us

a modem with firmware that only

worked on ADSL1 (despite,

confusingly, having settings for

ADSL2 and 2+ in the interface).

We asked what firmware to

upgrade to and we were given five

different firmware versions, though

Draytek couldn’t tell us which

would be most suitable firmware

to use with the Ericsson DSLAMs.

After trial and error, we eventually

found a firmware version that

would allow us to connect (2.6.5-

D1621), but even though line

sync speeds were good (up to

21.2Mbit/s) actual throughput

didn’t go faster than 11Mbit/s in

any of our tests.

We also observed problems

with the LevelOne modems.

Although they achieved good

throughput speeds, they

repeatedly dropped the TCP

connection mid-transfer. At other

times they would successfully get

through a file transfer. Normally we

would be hesitant to say this was

definitely due to a problem with

the modems, but in the case of this

test, it happened with both models

of the LevelOne modem we tested,

and not any of the other modems.

Because we used a rock-solid

dedicated FTP server, clean copper

lines and a consistent test method,

we feel confident in saying that

What a difference a year makes

M o s t p e o p l e p r o b a b ly n e v e r t h i n k

t o c h e c k i f t h e r e ’ s a n e w e r v e r s i o n

o f t h e i r M o d e M ’ s f i r M w a r e

Zyxel P2602HWL: improved performance

over last year’s results.

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