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  4. Nx8- Dual Composite MUX High-Speed 16-Port TDM Multiplexer
  5. Operation Manual

East Coast Datacom Nx8- Dual Composite MUX High-Speed 16-Port TDM Multiplexer Operation Manual

Summary of Nx8- Dual Composite MUX High-Speed 16-Port TDM Multiplexer

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    Operations manual nx8- dual composite mux high-speed 16-port tdm multiplexer 31 august, 2006 manufactured by: east coast datacom, inc. For technical support call: east coast datacom, inc. 245 gus hipp blvd., ste #3 rockledge, fl 32955 usa tel: (800) 240-7948 or (321) 637-9922 fax: (321) 637-9980 web...

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    166119 8/31/2006 i 1 introduction............................................................................................................................. 3 1.1 network configurations ..................................................................................................... 3 1.2 plan...

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    166119 8/31/2006 ii 4.1.3 redundant power supply .......................................................................................... 37 4.2 console operation .......................................................................................................... 37 4.2.1 console setup ........

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    166119 8/31/2006 1 safety warning always observe standard safety precautions during installation, operation and maintenance of this product. To avoid the possibility of electrical shock, be sure to disconnect the power cord from the power source before you remove the iec power fuses or perform any r...

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    166119 8/31/2006 2.

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    166119 8/31/2006 3 1 introduction the nx8-dualmux is a modular, 16 port dual-composite tdm multiplexer for high-speed serial data terminal equipment. It is designed to work in a paired, point-to-point configuration over one or two synchronous composite clear-channel links of up to 128kbps each. The ...

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    166119 8/31/2006 4 figure 2 point-to-point link as sub-multiplexer 1.2 planning the network administrator must determine how the nx8-dualmux units will work in the network and understand the applications that will utilize each of the available channels. Some of this work is made easier by the fact t...

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    166119 8/31/2006 5 2 key functions this section presents the functional operation and concepts of the nx64-dualmux. Readers should familiarize themselves with this section before proceeding to the installation section. Feature summary the major features of the nx8-dualmux are outlined in the followi...

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    166119 8/31/2006 6 2.1 multiplexer operation the central hardware element of the nx8-dualmux is a multiplexer/demultiplexer function through which all end-to-end user and management information flows. The drawing of figure 3 provides a high-level reference diagram for this function. Other functions ...

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    166119 8/31/2006 7 2.1.1.1 timeslots and channel rates the number of timeslots assigned to a channel determine the bandwidth of the channel, since the frame rate is constant, the greater the number of channel bits in the frame, the greater the port rate that can be supported. The basic frame rate is...

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    166119 8/31/2006 8 f 20 - (320) bits da 1 da 2 da 3 da 4 da 5 da 6 m 1 m 2 m 3 f da 1 da 2 da 3 da 4 da 5 da 6 m 1 m 2 m 3 db 1 db 2 db 3 db 4 db 5 db 6 da 5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 channel "a" allocated = 2400bps channel "b" allocated = 2400bps . . . F - framing timeslot ...

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    166119 8/31/2006 9 minimizes the duration of the interruption and eliminates the need for the operator to manually enter the sequence of commands. The nx8-dualmux has an additional feature that re-allocates channels to new timeslots when the composite link rate is changed by the user. This is partic...

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    166119 8/31/2006 10 rxd rxc txd txc txce rxd rxc txd txc txce loop-timed dte internal-timed dte tx data latch transmitted txce is used to clock out txd cross-over "null modem" cable connections rx data latch rx data latch tx data latch composite dte to dte connection diagram internal oscillator cloc...

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    166119 8/31/2006 11 for the nx8-dualmux, any parameter entry to the composite link rate causes the system to 1) resize the timeslot allocation memory map to the new frame size, 2) re-allocate all channels with non-zero clock rates to fit in the new allocation map, and 3) stores the complete configur...

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    166119 8/31/2006 12 2.1.7 channel port operation the 16 channel ports may be configured individually according to their various port options. All ports are implemented as dce interfaces and provide clocking to the attached terminal equipment. Any supported channel rate may be configured on any chann...

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    166119 8/31/2006 13 in the first and default mode, the dcd signal follows the state of the composite synchronization detector. Thus if sync is on, dcd at the channel port is on, and off if sync is off. In the second mode, the dcd signal may be configured to respond according to the state of the corr...

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    166119 8/31/2006 14 2.2 system operation 2.2.1 configuration management functions the configuration management functions are those features to which an operator has access for the purpose of installing, and configuring a working end-to-end multiplexer link. Many of these functions are self-explanato...

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    166119 8/31/2006 15 bandwidth is added to carry the control signal end-to-end. While bandwidth is added in both directions, only the port selected to respond to the rts from the opposite end of the channel will operate in this mode. If this option is changed while the channel is allocated, there wil...

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    166119 8/31/2006 16 2.2.4 system reset a system reset results from either 1) powering up the system, or 2) a system reset command. A system reset command performs identically the same functions as a power-on reset, without having to cycle the power. When a system reset occurs, the firmware containin...

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    166119 8/31/2006 17 2.2.6.3 copying a mixed configuration from a local to remote system using this command, the configuration parameters of the local system are copied to the remote in a similar manner as described in section 2.2.6.1 above, with the following difference: remote port parameters that ...

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    166119 8/31/2006 18 2.2.9 node id information a unique node name, of up to 20 alphanumeric ascii characters, may be entered into the non-volatile memory of each system in order to identify that system in the customer‟s network. The node id is displayed on the second line of every menu screen. 2.2.10...

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    166119 8/31/2006 19 the high/low attribute determines whether a channel can be bumped or not, to make room for another channel. High priority channels cannot be bumped, even by another high priority channel. Low priority channels may only be bumped by high priority channels. The seek backup/no backu...

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    166119 8/31/2006 20 assuming no channel backup switching is required, all channels should be configured for a failover mode such that they do not seek backup, i.E., their assignment to either link a or link b is fixed, regardless of the state of those links. In such a case, high or low priority will...

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    166119 8/31/2006 21 to configure this example, the operator would set channels 1, 2, 5, 7, 8, 12, and 15 to seek backup, while channels 4, 11, and 13 would be fixed. Again, the setting of high or low priority does not matter since no channels will be bumped. 2.3.3.1 failover rate options as an alter...

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    166119 8/31/2006 22 run at 512 kbps on its assigned home link, and 32 kbps when backed up on the alternate link. Table 3 1 6 24 12 12 96/24 24 12 96/24 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 hs hf ls lf 1 12/6 18 24/18 12 6 12 12 72/18 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 hs hf ls lf 316 34 236 68 lin...

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    166119 8/31/2006 23 an ascending count and finds channel 3 is “hs”. Since there were 68 timeslots unused on link b, the channel is reallocated onto link b (shaded box), now leaving 44 timeslots unused. Table 5 1 6 -24- 12 12 -96- 24 12 96/24 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 hs hf ls lf 1 8/2 16 ...

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    166119 8/31/2006 24 table 7 1 -6- -16- 2 2 -48- 8 7 -128- 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 hs hf ls lf 1 6 -12- 16 32 16/2 8 16 6 -3- 5 32 64/4 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 hs hf ls lf fail 0 236 2 link a: total user timeslots remaining free timeslots link b: total user timeslots remaini...

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    166119 8/31/2006 25 table 9 1 -6- 16 32 18 -2- -2- 48 8 7 128 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 hs hf ls lf 1 8/2 -32- -24- 8 4 3 5 64/4 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 hs hf ls lf 316 4 fail 0 link a: total user timeslots remaining free timeslots link b: total user timeslots remaining free ...

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    166119 8/31/2006 26 table 11 1 -5- 6 16 32 2 -2- -2- 48 8 -7- 128 4 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 hs hf ls lf 1 -12- -32- -16- 8 4 3 5 -64- 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 hs hf ls lf 316 4 fail 0 link a: total user timeslots remaining free timeslots link b: total user timeslots remainin...

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    166119 8/31/2006 27 channel rates and link speeds, a favorable configuration balancing efficient bandwidth utilization and backup under failure is usually possible..

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    166119 8/31/2006 28.

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    166119 8/31/2006 29 3 hardware installation the nx8-dualmux system hardware is designed for ease of installation and maintenance. The following sections provide important details on the physical design of the system and proper utilization of these design features. Front and rear views of the complet...

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    166119 8/31/2006 30 the nx8-dualmux system is comprised of the following user-accessible modules: main chassis power supplies ( 1 or 2) processor card, nx64 port i/o cards (4) 3.1 main chassis the main chassis includes support for ac mains power entry and distribution, backplane interconnections of ...

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    166119 8/31/2006 31 nx64-mux side inflow side outflow convection (through unit) figure 11 airflow around obstructions 3.2 power supply modules the power supply is a user-replaceable, plug-in module that furnishes dc power to the system derived from the ac power source. All power buses that interconn...

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    166119 8/31/2006 32 3.3.1 processor card replacement the processor card may be replaced with power applied to the system, but it is recommended that the process of removal and insertion be carried out with ac power off. There is no information preserved by keeping the ac power on the system while th...

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    166119 8/31/2006 33 ac mains power is ok power supply and processor board in place ac fuses ok ac line fuse is blown all leds on processor board are off sys status led is green no output to console terminal program power led on processor board is on sys status led is off or stays yellow replace powe...

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    166119 8/31/2006 34.

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    166119 8/31/2006 35 4 user interface 4.1 indicators 4.1.1 processor card the processor card has fourteen led indicators on its front panel as shown in figure 13. Each indicator‟s definition is as follows: power (green) – when on indicates that the power supply is providing regulated dc power to the ...

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    166119 8/31/2006 36 power sy s sta tu s sy nc pt# 166102 model: processor, nx-mux nx-mux disconnect ac power source before removing this module notice: tx c rx c rx d tx d loo p a composite b figure 13 processor card front panel 4.1.2 port i/o card the processor card has eight led indicators on it‟s...

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    166119 8/31/2006 37 ch + 1 a ct iv e ch + 1 l oo p ch + 2 a ct iv e ch + 3 a ct iv e ch + 4 a ct iv e ch + 2 l oo p ch + 3 l oo p ch + 4 l oo p pt# 166007 model: 4-port i/o figure 14 port i/o card front panel 4.1.3 redundant power supply in systems configured with redundant power supplies, the front...

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    166119 8/31/2006 38 table 13 – console terminal interface settings additionally, the nx8-dualmux console interface is designed to echo characters as they are received from the terminal, therefore the terminal or emulation program should not locally display characters as they are sent. 4.2.1.1 consol...

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    166119 8/31/2006 39 the operator is automatically logged off the system when there is no terminal keyboard activity for a period of 30 minutes. The operator may also perform a log off command by selecting option [6] on the top-level menu screen. 4.4 menu and screen format all menu screens adhere to ...

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    166119 8/31/2006 40 4.5 menu structure in order to illustrate the menu hierarchy in an abstract way, a graphical representation of the menu structure is used in this document. The following diagram shows the general symbols used in these illustrations and how they are used to construct a menu tree. ...

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    166119 8/31/2006 41 4.6 help menu the help menu (option [7] on the top-level menu screen) provides information on interpreting the status area of the screen and commonly used menu navigation functions. The operator should be familiar with the contents of the help menu, shown in figure 18 and refer t...

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    166119 8/31/2006 42 4.7 top-level menu the top-level menu provides eight optional menus from which to set-up and conduct system operations, as shown in figure 19 below. Composite link statistics 1 composite configuration menu 2 channel configuration menu 3 status/ configuration functions menu 4 top-...

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    166119 8/31/2006 43 ~ nx8 id: xxxxx sys:3.1 fpga:2.2 ser:0 00017:21:51 ~- cpa=l cpb=l channels: a a a a a a a a b b b b b b b b lpwr=x+ rpwr=.. ----------------------------------------------------------------------------- composite link errors when in sync link a rx link a tx link b rx link b tx lin...

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    166119 8/31/2006 44 option [4] : set composite b recover threshold same as option [2], but applies to composite link b. Option [5] : clear „hits over last xxxxx:xx:xx' counters clears the 2 nd line of error count registers and restarts the elapsed timer. 4.7.2 composite configuration menu [2] the co...

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    166119 8/31/2006 45 in this menu the operator begins by choosing the composite port to which subsequent menu operations and commands will be directed. Once this selection is made the command menu options, 1 through 10 are presented. In this way, the operator may set unique parameters for local versu...

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    166119 8/31/2006 46 option [3]- eia-530 option [4]- hi-z (off) selecting this last option turns off the composite port interface drivers. 4.7.2.4 composite link timing source[4] this menu allows selection of the source of the timing for the composite link. Clocks for all channels are derived from th...

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    166119 8/31/2006 47 option [7] - 60 seconds option [8] - 5 minutes 4.7.2.9 composite link restore holdoff timer [9] this menu allows setting the time period after link synchronization (sync) returns before the link is declared to be in service and available for re-assignment of channels option [1] –...

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    166119 8/31/2006 48 the following diagram depicts the menu/options tree for the channel configuration menu: local channel configuration 1 remote channel configuration 2 channel restoral timer 9 channel failover rate 8 [1]- loops off [2]- local loopback [3]- remote loopback [4]- both loops on channel...

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    166119 8/31/2006 49 configuration, such as the type of electrical interface of the port, which may be different on the local side from the remote side. On the other hand, most channel parameters, for example, channel rate, apply to both local and remote ports. After choosing a local or remote contex...

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    166119 8/31/2006 50 4.7.3.3 channel port type [3] this menu allows the selection of the type of port interface standard used at the selected port. Rs-232 is available on all ports, whereas eia-530, x.21 and v.35 are available only on the first port of each port card. It is not required that the port...

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    166119 8/31/2006 51 4.7.3.7 channel failover mode [7] the channel failover mode determines the priority a channel has under conditions where a composite link has failed and channels are re-assigned to the backup link. Low priority and fixed low channels on a non-failed link may be “bumped”, or suspe...

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    166119 8/31/2006 52 receive data signal of the dte in place of that from the multiplexer port. While this loop is in effect, a continuous mark signal is provided to the transmit data input of the port. [3] - remote loopback selecting this option causes receive data from the multiplexer port to be lo...

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    166119 8/31/2006 53 system, when linked up, is loaded from the file. The configuration is not stored to flash memory by this command 4.7.4.5 store/reload local and remote configurations to/from each flash [8 & 9] selecting either of these two options will cause the current active configuration to be...

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    166119 8/31/2006 54 4.7.4.9 reset to null configuration selecting this option causes the current active local configuration to the reset to a “null” configuration. The following image of the configuration status display (figure 25) indicates the state of the local system in a null configuration: ~ n...

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    166119 8/31/2006 55 4.7.5 test & maintenance menu [5] this menu presents several options for collecting information on the system status of the local and remote systems, and allows control over some “housekeeping” functions. The following illustrates the menu options for the test & maintenance menu:...

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    166119 8/31/2006 56 4.7.5.4.1 change password [1] this option allows an operator who is logged in, to change the password on the selected system. Passwords may be different on local and remote systems. When changed, the password is updated immediately in flash memory. 4.7.5.4.2 change nodeid [2] thi...

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    166119 8/31/2006 57.

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    166119 8/31/2006 58.

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    166119 8/31/2006 59 5 appendix 5.1 factory default configuration (null configuration) systems are shipped with a factory-default configuration to provide a starting point for the operator to configure the system and establish limited, basic functionality of the hardware. The factory default configur...

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    166119 8/31/2006 60 5.2 connector pinout diagrams 5.2.1 channel port connectors (dce) 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 25-pin sub-miniature d-type connector with sockets (female) signal pin no. Rs-232 mode eia-530 mode (ports 1, 5, 9, & 13 only) v.35 mode * (ports 1,...

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    166119 8/31/2006 61 5.2.2 composite port connector (dte) 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 25-pin sub-miniature d-type connector with pins (male) signal pin no. Rs-232 mode eia-530 mode v.35 mode * 1 frame gnd frame gnd (shield) frame gnd (shield) 2 txd txd + sd + 3 r...

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    166119 8/31/2006 62 5.2.3 console port connector rs-232 async dce 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 25-pin sub-miniature d-type connector with sockets (female) pin no. Signal 1 frame gnd 2 txd 3 rxd 4 rts 5 cts 6 dsr 7 signal gnd 8 dcd 20 dtr note: undesignated pin no...

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    166119 8/31/2006 63 5.3 adapter cables 5.3.1 composite port v.35 adapter cable connection diagram use the following diagram when constructing or specifying an adapter cable between the nx8-dualmux composite port and a standard v.35 cable, or dce device. V.35 mode 25-pin female sub-miniature d v.35 3...

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    166119 8/31/2006 64 5.3.2 composite port x.21 adapter cable connection diagram use the following diagram when constructing or specifying an adapter cable between the nx8-dualmux composite port and a standard x.21 cable, or dce device. Eia-530 mode 25-pin female sub-miniature d x.21 15-pin male sub-m...

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    166119 8/31/2006 65 5.3.3 composite port rs-449 adapter cable connection diagram use the following diagram when constructing or specifying an adapter cable between the nx8-dualmux composite port and a standard rs-449 cable, or dce device. Eia-530 mode 25-pin female sub-miniature d rs-449 37-pin male...

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    166119 8/31/2006 66 5.3.4 channel port v.35 adapter cable connection diagram use the following diagram when constructing or specifying an adapter cable between any nx8-dualmux channel port operating in v.35 mode and a standard v.35 cable, or dte device. V.35 mode 25-pin male sub-miniature d v.35 34-...

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    166119 8/31/2006 67 5.3.5 channel port x.21 adapter cable connection diagram use the following diagram when constructing or specifying an adapter cable between any nx8-dualmux channel port operating in eia-530 mode and a standard x.21 cable, or dte device. Eia-530 mode 25-pin male sub-miniature d x....

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    166119 8/31/2006 68 5.3.6 channel port rs-449 adapter cable connection diagram use the following diagram when constructing or specifying an adapter cable between any nx8-dualmux channel port operating in eia-530 mode and a standard rs-449 cable, or dte device. Eia-530 mode 25-pin male sub-miniature ...

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    166119 8/31/2006 69 5.3.7 channel port-to-console adapter cable any nx8-dualmux channel port, with a management terminal attached, may be used to directly access the menu-driven user interface on a remote nx8-dualmux by cabling the corresponding channel port on the remote system to the console port....

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    166119 8/31/2006 70 5.4 configuring an nx8-dualmux link for simplex operation the nx8-dualmux may be used to support simplex network traffic. Since the multiplexer is designed to normally provide full duplex operation, simplex configurations are by nature, special cases, and certain features of the ...

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    166119 8/31/2006 71 one method to work around the problem of implementing differing local and remote channel parameters, is to remove the transmit loop at the sending end of the link for the duration of the configuration change. While the transmit loop is down, the sending end will neither send nor ...

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    166119 8/31/2006 72 5.5 technical specifications application multiple sync or async dte devices time-division-multiplexed onto one or two synchronous dce communication links and demultiplexed by an identical unit at the far end. Timing system timing: external via composite port or internal timing fo...

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    166119 8/31/2006 73 5.6 ordering information part number: 166100 model: nx-mux_dd description: 16-port dual composite, dual power chassis qty req: 1 part number: 166106 model: nx-dual composite description: nx8-dual composite processor card qty req: 1 part number: 166007 model: nx8-i/o description: ...