Toshiba PORTEGE R700 - Manual (Page 175)

The range of the wireless signal is related to the transmit rate of the
wireless communication. Communications at lower transmit range may
travel larger distances.
The range of your wireless devices can be affected when the
antennas are placed near metal surfaces and solid high-density
materials.
Range is also impacted due to "obstacles" in the signal path of the
radio that may either absorb or reflect the radio signal.
Supported Frequency Sub-bands
Subject to the radio regulations that apply in the countries/regions, your
Wireless LAN module may support a different set of 5 GHz/2.4 GHz
channels. Consult your Authorized Wireless LAN or TOSHIBA Sales office
for information about the radio regulations that apply in the countries/
regions.
2.4GHz Band Channels Sets (Wireless IEEE 802.11
Revision b, g and n)
Frequency Range
Channel ID 2400-2483.5 MHz
1 2412
2 2417
3 2422
4 2427
5 2432
6 2437
7 2442
8 2447
9 2452
10 2457 *1
11 2462
12 2467 *2
13 2472 *2
*1 Factory-set default channels
*2 The band width and the channel which can be used depends on the
installed wireless LAN module. And the approved channels on using are
PORTÉGÉ R700 / Satellite R630
C-2 User's Manual