Polycom spectralink scd408 User Manual

PN: 1725-36097-001_J.doc

Technical Parameters

Select Alternate Spread Spectrum Sequence

The SpectraLink 6000 System uses spread spectrum radio
transmission. Spread spectrum takes a discrete signal, such as a
digitized voice conversation, and spreads it over a wide range of
frequencies rather than transmitting at a single carrier frequency. The
frequency range may need to be adjusted if other wireless devices in
your facility, such as data terminals or bar code readers, share the
same frequency band.
Units shipped from the factory are preset to operate on sequence 1,
which spans the entire spectrum from 902MHz to 928MHz. If
interference between the SpectraLink 6000 System and other 900MHz
radio devices is anticipated or observed, any one of six alternate
sequences can be selected.
Determine the frequency band of the interfering device, then use the
frequency ranges below (given in MHz) to select the best interference
avoidance pattern for the situation.

Sequence

Frequencies Used by SpectraLink

1 902-928
2 902-915
3

902-909 & 921-928

4 914-928
5

902-904 & 909-921

904-910 & 920-928

7 908-922

To change a system to an alternate sequence, perform the following
steps for each MCU.
1. Wait for any calls in progress to end. Power the system off, then

slide the mode switch to the

position.