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TDM MUX Picture




Features / Benefits

  • Composite Port Interface
  • Software selectable for RS-232
  • RS-530, V.35,RS-422/449 or X.21
  • Sub-Channel Interface(s) - 16 ports RS-232, four ports are software selectable for RS-232, RS-530, V.35, RS-422/449 or X.21
  • Sub-Channels support Sync to 768k and Async data up to 38.4kbps
  • Composite Port speeds - 64k up to 2.048Mbps in 64k increments
  • Independent sub-channel configuration with support for remote downlink loading
  • Non-disruptive channel configuration
  • All configuration via terminal port
  • In-Band Management Channel allows remote upgrades, configuration and status
  • Modular design with front load cards
  • Sturdy Metal Rackmount Enclosure
  • 85-264 VAC Universal AC Input
  • Optional Redundant Power Supplies


The 16-Port Nx64-MUX is a modular TDM Multiplexer designed to support up to sixteen sub-channel ports from 9.6Kbps to 768Kbps in both Sync and Async formats.
The unit is supplied with a variable composite port rate from 64Kbps to 2.048Mbps in 64k increments for maximum flexibility. The composite port data interface is software
selectable for RS-232, RS-530, V.35, RS-422/449 or X.21.

The sub-channel ports may be individually configured to support flow control of RTS to DCD on a port by port basis or no flow control. The ports also support individual
RTS to CTS delays and external TXC timing for DCE to DCE crossover. The data interfaces are RS-232 on 16 ports. Four of the user ports are software selectable for
RS-232, RS-530, V.35, RS-422/449 or X.21.

The Nx64-MUX derives its timing from the external DCE attached to the composite port. Alternately, timing may be sourced by the Nx64-MUX in a direct cabled pair of multiplexers.

The Nx64-MUX utilizes four, 4-port interface cards, a main processor card and a power supply card. This modular design facilitates future upgrades and allows the user to add user ports in 4-port increments. All cards are front load.

The management port allows local and remote configuration commands. Integral software design features allow configuration of a sub-channel without disrupting existing sub-channels. Network management features include channel and composite loop backs, and link down error reporting. All port parameters are set with an async terminal connected to the configuration port. Setup procedures are menu driven and all parameters are stored in memory that supports power outages.

The Nx64-MUX has an internal power supply and supports voltages of 85-264 VAC. The unit supports redundant power supplies with system notification via optional chassis. The unit is 3-U high, or 5-U high and is standalone or 19 inch rackmount. The factory warranty is 3 years.

sub rate multiplexer picture


Application Multiple Sync or Async DTE devices time division multiplexed onto one Sync DCE communication link
Timing System Timing: External via Composite Port or Internal Timing for back-to-back connections
Each sub-channel Port capable of accepting external TXC timing for DCE to DCE crossover
Capacity Composite Port: One Input
Sub-Channel Ports: Up to sixteen
Data Rates Composite Port: 64k to 2.048Mbps in 64k increments

Sub-Channel Ports:
SYNC: (Full Rates) 19.2k, 38.4k, 56k, 64k,
128k, 256k, 384k, 512k, 768k
(3/4 Rates) 7.2k, 14.4k, 28.8k
ASYNC: (Full Rates) 9.6k, 19.2k, 38.4k
(3/4 Rates) 7.2k, 14.4k, 28.8k
Async Support: configurable for 8, 9, 10 and 11 bit data on a per channel basis
Data Format Data transparent at all data rates
4 Port Sub-Channel I/O Card(s) Four Ports: DB-25 Females, Four ports RS-232, one port Software Selectable for RS-232, RS-530, V.35, RS-422/449 and X.21 Maximum 4 cards per chassis, 16 I/O's per chassis
Control Leads Passed Options for none or RTS to DCD in Band
Maximum Channel Composite Rate 128Kbps with composite overhead of 1600 bps. Overhead is constant for all composite port rates.
Cascade Port Via any sub-channel port
Indicators Power, TX Data, RX Data, TX Clock, RX Clock, Sync, Loopback
Composite Port Interface One Port: DB-25 Male, Software selectable for RS-232, RS-530, *V.35, *RS-422/449 and *X.21
*(Adapter cable required)
Power Source 85-264 VAC @10%, 47-440 Hz, IEC Power Inlet, (2) 5mm Fuses
Environmental Operating Temperature....32º to 122º F (0º to 50º C)
Relative Humidity.............5 to 95% Non-Condensing
Altitude............................0 to 10,000 feet
Dimensions Height ....... 8.72 inches (22.10 cm)
Width ........ 17.00 inches (43.18 cm)
Length ....... 9.00 inches (22.86 cm)
Weight 9 pounds (4.2 Kg)
Warranty Three Years, Return To Factory
Model: Nx-MUX_DD
Description: Dual Composite, Dual Power Chassis
QTY Req: 1

Part Number: 166106
Model: Nx8-MUX_DD to 128Kbps
Desc: Nx-8 Dual Composite Processor Card
Qty Req: 1

Part Number: 166007
Model: Nx8-I/O
Desc: I/O Board, 4-Port, Nx-MUX
QTY Req.: 1 to 4 Max

Part Number: 166080
Model: Nx-SRPS
Description: Nx-MUX,Single Redundant Power Supply
QTY Req: 1 or 2