Polycom 2W Brochura

CU

Desktop

Telephone

Base Unit

50 feet

35 feet

cellular

adapter

 

 

For the Cellular Test Setup (shown in Figure 3), the base unit and the wireless phone unit with the cellular 
adapter attached were located within the CT Labs test facilities building, where a total of five walls separated 
the base unit from the wireless phone unit. The base unit was not powered up for any of these tests.  Two test-
ers (1 male, 1 female) performed a manual speech quality assessment in this configuration. 

 

The purpose of this evaluation was to determine how easy and error-

free the installation and configuration of the unit were to perform, using only the provided vendor documentation. 

The purpose of this evaluation was to determine the functionality, consis-

tency, and ease-of-use of the product while using it to exercise as many of the phone’s features as possible in the 
time frame designated for this test. 

The following tests were performed in the small conference room setting: 

1.  Basic Conversation with Dynamic Range Test: The purpose of this test was to determine basic quality and the abil-

ity of the conference unit to handle varying sound levels. The participants in this test were positioned at fixed loca-
tions in the conference room.  During the dynamic range portion of this test, the staff used a variety of voice loudness 
levels

 (loud, normal, quiet, and whispering). 

2.  Conversation + Background Noise Test: The purpose of this test was to determine the unit’s ability to handle con-

versations in the presence of several typical office noise conditions. Two types of background noise were introduced: 
(1) a single fan in a fixed location in the conference room and (2) a composite road traffic audio loop (3 minute dura-
tion) was played through speakers

 with the intention of creating sound levels consistent with a window opened onto a 

street moderately busy with traffic. 

3.  Acoustic Echo Cancellation Test: The purpose of this test was to compare acoustic echo cancellation performance 

of the units. The scripted actions in this test involved “real-world” movement scenarios, designed to duplicate people-
movement conditions that would typically occur during a conference call. For each scenario, the tester using the “far 
end” telephone in the quiet office would quickly speak “One, two, three, four, five,” while carefully listening for how 
much of that utterance could be heard in a return echo.  

4.  Loudness Test: The purpose of this test was to verify speech quality at the highest volume level for each unit setting. 

This test was performed with one person in the conference room using the conference phones, and one person in a 
separate office using a desk phone handset.  Only one conference unit was active at a time -- the base unit for the 
other phone was unplugged when not in use.  The peak volume output of each phone was measured in the conference 
room while the desk phone user spoke in a very loud voice. 

The purpose of this test was to verify the level of voice quality of the SoundStation2W conferencing 

phone unit while placing calls via a Nokia 2260 cellular phone on the AT&T Wireless TDMA network and the 
PSTN.  Comparisons with cell phone-to-PSTN calls were made to confirm that speech quality was as good as or 
better than cell phone usage alone using the same test locations. 

The purpose of this test was to determine the voice quality of the phone units at a distance of 30 to 

50 feet from their respective base units, with and without added RF interference from another wireless product oper-
ating in the vicinity of the conference unit. 

                                                      

1

 All loudness levels used during these tests were calibrated for each speaker using an SPL meter. 

2

 Two small stereo speakers were used for mid-range and treble, and a single floor-mounted base woofer was used.  All speakers 

were positioned against the far conference room wall. 

 

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