As the gap dividing voice and data networks disappears, developers are releasing
products to take advantage of this convergence. 3Coms NBX 100 Communications System
gives users the ability to consolidate telephony with their data network. This scalable
voice/data switch (IP-PBX) is appropriate for small- and mid-sized organizations, or for
larger organizations when additional ports are installed. It provides major telephony
functions, such as voice mail, auto attendant, and caller ID, among others. It also
provides next-generation features, like the ability to transform a Windows NT system into
an H.323-compatible gateway.
INSTALLATION
The NBX 100 Communications System consists of several parts: A milk crate-sized
black-box chassis, individual IP phones, and the receptionists switch (called the
adjunct). Administrators must provide a Windows NT computer for the IP gateway software to
run on. The system did include all the necessary wires and cables, but the heavy-duty road
case that it arrived in looked like it would be a better fit backstage at a Metallica
concert.
The system is as close to plug and play as you can get, which is remarkable
for such a telephone system, since these products tend to be very complicated. The box is
rackmountable, and the appropriate mounting equipment was provided. We hooked up the NBX
100 to a high-end PC running Windows 98, via a COM port. There is one cable connecting the
CPU to the front of the chassis (all the cables, the power supply, and the removable cards
connect to the front), as well as the removable cards. The systems include built-in analog
line cards and 10Base-T hubs.
When we plugged in the Ethernet telephones, we were expecting a setup task as well. So,
it was a pleasant surprise when each phone automatically downloaded setup data from the
NBX 100 unit, including extension numbers. Each successive phone picked the next available
extension in the pool. Within minutes we had dial tones and were able to make
extension-to-extension voice-over-IP calls. Considering that many traditional and PC-based
PBXs require hours of configuration before a dial tone is even achieved, the NBX 100 setup
was very impressive. Each phones LCD screen shows the status of the phone, and when
they are ready, further programming is accomplished through a Web interface. (This
interface mostly involves the Tab To It feature, which is a master-control GUI
that is basically dozens of folder tabs to submenus.) Here, we learned how to make a
backup of the current configuration, which allows us to transfer the database to a new
chassis in the event of a problem with the unit.
Configuring the individual telephones and voice-mail boxes was extremely easy. Each
phone has a central message button which, when pressed for the first time, automatically
begins its setup task. Adding trunk lines, additional line pools, etc. is just as simple,
mostly because of the intuitive nature of the Tab To It feature and the rest
of the administrators interface. We also configured Windows 98 and NT client PCs
with 3Coms pcXset softphone. This installation used a typical wizard. The only
difficulty we encountered was failing to properly install the packet driver in NT, and
selecting the wrong MAC address, but both of these issues were oversights on our part.
We next installed the ConneXtions gateway software on NT. The gateway installation
failed to show itself among the systems line cards, which caused us concern, but a
3Com engineer helped us solve the problem: The ConneXtions software and the pcXset each
require a dedicated MAC address (and thus a dedicated network card), but the computer we
installed them on had only one network card. Rather than wrestling with installing two
NICs on one PC, we just installed the ConneXtions gateway on a different computer.
However, the gateway functionality was still in its beta form when we tested it, so some
pieces were not completely supported. For example, we were successfully able to call from
the 3Com phones and from the pcXset softphones to a NetMeeting 3.x client on another
network segment, but we were unable to complete calls in the opposite direction. We expect
this feature to improve as more bug fixes are released, and were told by a 3Com
representative to expect full functionality and improved H.323 compliance later this year
or early next year.
Finally, we configured a basic auto attendant. What impressed us most about this
process was that its very similar to configuring an auto attendant on just about any
other phone system weve ever used. Some of the more tedious topics include button
mappings, configuring the adjunct, planning different greetings and actions for different
times, etc. A basic setup took us less than an hour, but for a more complicated real-world
setup, allow at least a full day.
DOCUMENTATION
There are two sources of documentation for the NBX 100: The Installation and
Configuration Guide, which has more than 200 pages of administration information, and the
Users Guide, geared toward the end user. Both are excellent, addressing the setup
and configuration of the unit in a logical order.
The Installation and Configuration Guide gives an overview of the system, a
step-by-step guide through installing and setting up the computer and chassis, and very
useful information about the technology concepts and problems that the product aims to
solve. The manual divides each section into easily understood instructions, which even the
non-technical user can cope with. There are ample illustrations, and the text is not
loaded with technical jargon.
The Users Guide is much smaller, and a bit less technically oriented. It deals
mostly with the features of the phone, and the configuration of the phone itself,
including voice mail, greetings, and call forwarding. It covers the general and more
common features early in the manual, and the optional, more complicated processes
(including configuring personal speed-dial entries) later in the book.
The other manual we received was the beta version of the ConneXtions Installation
Guide. This manual deserves very high accolades for placing a thorough discussion of H.323
issues early in the book, before it covers the actual installation. There is also a
helpful glossary at the end, along with a well-organized index.
Overall, all three manuals are much better than average, and there is little, if any,
room for improvement needed for them. Our main criticisms are the lack of a quick-start
guide, which would be helpful to MIS staffs who may not be experienced in the CTI field,
and the almost pathetic lack of useful information or support at 3Coms NBX Web site
(as of late August). This surprised us, considering the very effective telephone support
we received.
FEATURES
The NBX 100 integrates seamlessly into an existing network and is a
self-contained unit, requiring a connection to a separate CPU for administration purposes.
The unit requires no proprietary cards or cables, as the connection is made through the
computers COM port. Furthermore, the NBX 100 is administered using a browser
either Microsoft Explorer or Netscape Communicator avoiding any proprietary
software. This also helps with administration, and the network can be set up to configure
the unit from a remote location, as long as the administrator knows the IP address. The
NBX 100 supports any combination of telephones and trunks, totaling up to 148. Of course,
the NBX 100 also includes the gamut of standard features found in most office phone
systems, including:
- Auto-Attendant;
- CTI/TAPI customization;
- Integrated voice mail and messaging features;
- Integration with standard network devices;
- Standard business phone features;
- Follow-me feature on the phones; and
- Call reports.
The phones themselves are sleek-looking and well designed. They are flat, with a stand
that gives them the option of sitting at a low or high profile, or wall mounted. They have
multi-line capability, and include several programmable buttons as well as the standard
business phone buttons. They have speaker-phone functionality, an LCD panel for caller ID
and status purposes, and redial, transfer, conference, mute, and message buttons. The
buttons are large, and the hold and message buttons are color-coded red and purple,
respectively. Users are able to forward mail, program speed-dial (using the GUI), and
initiate conference calls with specific buttons. The phones are available in black and
off-white.
Several other features are part of the NBX system. It is an extremely stable unit,
running VX, a UNIX-based OS. The NBX 100 does not depend on PC services or clients to
operate: Even if every PC on the network stops functioning, the NBX 100 continues to
provide full-functioning PSTN telephone communications. (The ConneXtions software does use
some NT-based services.) There is also the ability to back up the database in the NBX 100
to the connected PC, in case of unit failure. The database file can be placed on a new
chassis, and the system will save the settings from the previous unit, which avoids
downtime in the event of a total system failure.
Another important feature is the telephone auto discovery and auto relocation feature.
A user who moves into a new location within the building (or the WAN) can plug their phone
into the network, and the NBX 100 will retain the phone number and personal settings. The
telecom administrator does not have to change any settings on the system a truly
plug-and-play experience! Also, the actual telephones have an RJ-45 pass-through
essentially a built-in one-port hub to provide a true single wire to the
desktop experience.
OPERATIONAL TESTING
We were looking forward to testing the NBX 100 because its class of product is
very new, and we had some experience testing similar products from Cisco (Selsius) and
Ericsson (Touchwave). We were very prepared for a frustrating, lengthy installation, but
as we mentioned earlier, the 3Com unit was extremely easy to set up, which led us to
assume that the rest of the configuration would be as easy. Fortunately, we were correct
in this case.
Beyond the initial installation, things we tested included configuring the phones,
setting up voice mail and greetings, and features like forwarding voice mail, transferring
calls, etc. All of these functions worked flawlessly, and the quality of the system was
also excellent. There was no distortion, latency, echo, or jitter in any of the
inter-extension calls, mostly because these calls are all on the same controlled LAN
segment. In the real world, as voice-over-IP calls traverse segments on a WAN and traverse
the WAN onto the PSTN and back, the call quality will suffer. All our transfers went
through, and all the telephone features we tested (speaker, redial, and transfer) worked
well. We were quite impressed with the system. We also tested calls between the network
and a simulated PSTN network, which sounded just as good. Finally, we repeated all of
these tests using a network degradation tool called The Cloud from Shunra
Software (see our review of The Cloud in the August 1999 issue). Overall, we found that
even under standard network congestion in a WAN environment, the issues of latency,
jitter, and echo were acceptable, and in the ideal LAN environment, they were excellent.
Even for the cases where the audio quality was only marginal, the extensive feature list
proves that an IP-enabled phone switch is worthwhile.
We also were pleased with the level of difficulty for configuring the phones, and for
teaching end users how to take advantage of their features. The administration tools were
also not difficult to learn, although we would like to see improvements to the
context-sensitivity level of the online help too often, the help offered was not
all that helpful, and dealt with concepts rather than how-to methods.
ROOM FOR IMPROVEMENT
One thing that disappointed us about the current NBX 100 version is that its IP
phones are not 100Base-T compliant. This is a problem, as the users PC is networked
directly through the telephone, and it would slow the network if the PC had a 10/100
network adapter. 3Com engineers told us that they are working on this problem, and a
10/100 compatible phone is in production.
Any other problems are minor. The time/date display in the GUI (which was Internet
Explorer, in our case) doesnt refresh, but this is an HTML issue, not necessarily a
3Com issue. An opportunity to use third-party phones, or a perhaps the option to have a
slim-line model that takes up less desk space, is another improvement that
could be made. As we discussed above, the H.323 compatibility still needs a lot of
tweaking, and wed like to see a bigger selection of vocoders to choose from within
the ConneXtions gateway.
Overall, there are very few features or functions that we felt could be improved.
Were also told that an analog telephony adapter is being developed, which will let
you attach standard analog devices (like a regular telephone or fax machine) to the master
unit, and a T1 card is also coming soon.
CONCLUSION
3Coms NBX division has designed a solid unit, and almost everything worked
functionally perfect the first time. Their engineers should be proud. We had seen previous
beta versions of the NBX 100 Communications System at various trade shows, so we knew
ahead of time that it was a powerful system, but its shockingly simple setup in our lab
was very impressive. It is an excellent choice for a highly functional telephone system.
Well-designed and requiring minimum maintenance, the NBX 100 gives users an advanced
telephone system with all the necessary features required in todays business world,
and is much easier-than-average to administrate than most similar products. Were
hoping to see some third-party developers write TAPI applications to make the NBX 100 even
more practical. In the meantime, we award the NBX 100 our Editors Choice kudos. |