UMUX III
Raytheon’s Command and Control Switching Systems (CCSS) products utilize the
Motorola Universal Digital-Loop Transceivers (UDLT) technology for providing
connectivity between the switches and the subscriber end instrument. The UDLT
technology and requirement to provide –48V to the end instrument over the wire pair
restricts remoting of the subscriber end instrument to a cable length of 2000 feet.
The UDLT Multiplexer (UMUX) provides a low cost solution to remote up to 23 CCSS
phones beyond the 2000-foot limit. In Fiber mode, the subscriber end instruments can be
remoted up to 5000 feet. In DS1 electrical UMUX-II legacy mode the subscriber end
instruments can be remoted up to 4000 feet. For the new UMUX-III DS1 electrical mode
subscriber end instruments can be remoted up to 2650 feet. When using other network
transmission media (e.g., satellite transmission), there are virtually no limits for remoting
subscriber end instruments.
Two separate products made up the original UMUX family of devices: the UMUX
Master (UMUX-M) and the UMUX Slave (UMUX-S). The UMUX-M interface is
designed for direct connection to the Electrospace Secure Digital Switch (SDS) or
Digital Small Switch (DSS). The UMUX-S interface is designed for direct connection to
the Electrospace CCSS phones. Using an external bandwidth manager, a single
UMUX-M can be interconnected with up to five UMUX-S devices. Each voice channel
is also separated from the corresponding in-band control/data channel for applications
that must use voice compression to reduce the required network bandwidth.
The UMUX-II is the second generation UMUX device which combines the functionality
of both UMUX-M and UMUX-S into one unit. The UMUX-II Legacy mode supports
backward compatibility with the original UMUX devices. The UMUX-II supports remote
operation of up to19 UDLT phones. A Switch end and a Phone end UMUX-II are needed
to provide this functionality.
The UMUX-III is the third generation UMUX device which combines the functionality
of the UMUX-II with the new functionality of a Digital Phone Multiplexer (DPM). This
new functionality is an enhanced version of Raytheon’s legacy DPM-1 Digital Phone
Multiplexer. The legacy DPM-1 extended UDLT phone service for up to 16 phones from the main switch using a Limited Bandwidth T1 (LBT1) interface. The enhanced UMUXIII
provides UDLT phone service for up to 23 phones allowing configuration of the
interface to the main switch (Ingress link). The Ingress link can be configured to be any
3 electrical T1 interfaces, the Fiber Optic interface or the MIL-188-144 interface.
Additionally, the UMUX-III can be configured to provide remote service to instruments
located on a “cascaded” UMUX-III by defining an Egress link and defining the interfaces
to be “passed” to the remote UMUX-III.
Features
Supports up to 23
Raytheon digital phones
No external DC power
supply needed
UMUX III master timing
derived from a UDLT link,
T1 or extended timing
source (1.544 MHz)
Front panel display with buttons shows alarms and allows for configuration
Provides three network
interfaces Long/Short-Haul
T1, Fiber, MIL-188-114
MIL-188-114 network
interface provides contact
closure crypto resync
Autoranging AC input
90-264 VAC, 50 or 60 Hz
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Interfaces
• 2 100/10MB Ethernet
• Primary Rate T1/E1 4 Ports
• 24 UDLT Telephone Interfaces
• MIL-188-114
Network Interface
• 1.544 Mbps T1 Network Interface
• Fiber TX/RX Interface
• Fiber Network
Interface RX
• Fiber Network
Interface TX
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