Logitech Wireless BH870 - Manual (Page 26)

BH870 Wireless Bluetooth® Headset User’s Guide 26
7.10 Narrowband vs. Wideband Audio
The BH870 Headset supports both wideband and narrowband audio, but uses narrowband by default. In particular you should consider
using wideband if you listen to music from your PC.
Note: Wideband audio is only supported between the BH870 Headset and base for softphones or for streaming music from a
PC. Wideband audio may slightly reduce the range of your headset.
You are able to configure narrowband/wideband operation for each PC and softphone using the Jabra PC Suite. See the Jabra PC Suite
online help for details.
7.11 High-capacity BH870 Headset Installations
Bluetooth uses low-power radio technology for wireless transmission. All radio technologies are subject to interference from other
products using radio technologies commonly used in offices.
Therefore, under certain conditions you might experience some performance degradation if you install many headsets in one location
or if there is interference from other radio technologies. For Bluetooth, those performance degradations are typically the result of
interference from other Bluetooth products including other BH870 Headsets and from Wi-Fi networks. Performance issues manifest
themselves as audible clicks and pops, but will seldom prevent headset operation.
The following guidelines will help you plan a high-capacity installation to minimize interference and to ensure
an optimal audio performance, a high-quality audio based on a signal-to-noise consideration:
• If you install fewer than 25 headsets in one area, you are advised to separate headset bases so that they are at least 1 – 2m apart.
• If you install more than 25 headsets in one area, you should observe the following assumptions (valid for Bluetooth technology class
1 operation):
# For 26 – 81 Bluetooth headsets in one area, ensure on average 4m 2 – 16m 2 per headset (2m – 4m base-to-base separation).
# For 82 – 169 Bluetooth headsets, ensure on average 16m 2 – 25m 2 per headset (4m – 5m base-to-base separation).
# Above 169 Bluetooth headsets, ensure minimum 25m 2 per headset (minimum 5m base-to-base separation).
• These assumptions are conservative because they assume users are on call 100% of the time. In many cases, 50% is a better
assumption, even for some contact centers, while typical office planning assumes a 10-15% call time. This reduced on-call time has an
impact on planning. If the users are on call less than 50% of time, use the following guidelines:
# 26 – 81 headsets: 2m 2 – 8m 2 area, 1.4m – 2.8m separation
# 82 or more headsets: 12m 2 area, 3.5m separation
• Using the headset’s power save mode is recommended for a high-capacity installations.
The area referred to above depends on the building layout. It could be an open space office, or a set of collocated offices separated by
lightweight walls. Offices far apart, say >100m apart, or shielded by heavy concrete walls, should not be considered as one area. The
above planning figures are valid if most users are near their bases (<3m distance). If most users are >5m away from their bases, you
should roughly double the recommended area.
In all cases, you should check whether a Wi-Fi network (in particular an 802.1 b, g, or n network) is used. If Wi-Fi is heavily used, you may
need to reduce the number of headsets to ensure satisfactory Wi-Fi performance. Using more than 20 Bluetooth headsets with a 100%
call time in an area where Wi-Fi is heavily used needs a proof-of-concept installation.
Practical customer cases indicate that Bluetooth headsets scale very well in high capacity deployments.
7.12 Managing Bluetooth Connections and the Pairing Table
Making and Changing Connections
The headset is able to maintain up to two connections (typically to a mobile phone and USB Bluetooth Adapter). If you want to connect
to a third device that is already paired with the headset, turn off the headset and the unit you wish to disconnect. And then turn on the
new unit to which you wish to connect and turn the headset back on.
Another way to change the connection is to pair or re-pair manually the headset with any device not currently connected. (It does not
matter if they are already in one another’s pairing tables). See also 7.4 Using the Headset with Other Bluetooth Devices.
Clearing the Bluetooth Pairing Table
When you pair two Bluetooth devices, each device adds the other to its own internal pairing table, thereby enabling both devices to
connect to one another and to use encrypted communication. The BH870 Headset is able to hold up to 8 devices in its pairing table. If
you add a ninth device, the headset automatically removes the device in the table that has not been used for the longest period of time
in order to make room for the new device being added.
You can also clear the entire pairing table manually. To do so, use the Jabra PC Suite. See 5. Installing and Running the Jabra PC Suite for
more information.