INSTALLATION AND USERS GUIDE
3019 Alvin DeVane Blvd.
Ste. 560
Austin, TX 78741
Phone: (650) 965-8020
CORPORATION
®
TECH SUPPORT: 650-965-8020 ext. 703
The Setcom MS-900SPW4 is a Wireless Single-
Person Radio Interface designed for vehicular or
desktop use. It is typically connected to a single
mobile radio through use of the proper radio cable.
The MS-900SPW4 is designed to operate with a
Setcom CSB-900W4 Wireless Headset.
Adding an RRC-950 Radio Routing Controller and a
25-0108 connecting cable will allow operation with
two radios. One radio cable will be required for each
radio. The RRC-950 has a toggle switch that allows
for switching TX, RX, and PTT functions between the
two radios (RX can be either summed or switched).
The MS-900SPW4 can be powered from 12 to 24
VDC, either supplied by a vehicle power system
(using a Setcom 25-1004 Power Cable), or by using
a small AC-to-DC power supply (Setcom 26-5007).
The unit has an internal 1 Amp ATO-type fuse, but it
is recommended that a vehicle power source also be
fused (at least 1 A).
Questions or technical issues? Please call:
Page 1 of 5
4/22/16 SBH
MS-900SPW4_UserGuide_REV_A.pdf
To install antenna, carefully thread it onto the
gold connector on top of MS-900SPW4
28-2017
Wireless Antenna
RADIO
POWER
RRC
(Antenna
Connector)
