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RFL Electronics Inc.
I N S T R U C T I O N D A T A
RFL NCM
Network Communications Module
DESCRIPTION
The Network Communications Module (NCM) is an Asynchronous Data Module designed for use in
RFL IMUX 2000 T1 and E1 multiplexers. It provides one DCE Half/Full-Duplex channel between an
unlimited number of locations using a single 64 kbps DS0 time slot. The NCM provides a fast and
reliable NMS communication path between nodes of a T1 or E1 network, and can als
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SPECIFICATIONS As of the date this Instruction Data Sheet was published, the following specifications apply to the RFL NCM Module. Because all of RFL products undergo constant improvement and refinement, these specifications are subject to change without notice. Live Insertion/Extraction: The NCM Module is capable of live insertion and extraction into the IMUX 2000 shelf without interruption to the DS1 or any other DS0. Asynchronous Data Interface: Full duplex or half duplex, one
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INSTALLATION Before the RFL NCM module can be placed in service, it must be installed in a multiplexer shelf. Installation involves determining the module slot in the Main Shelf or Expansion Shelf where the module will be installed, inserting a Module Adapter into the rear of the shelf behind the module slot, connecting all signal and power wiring to the Module Adapter, checking the settings of all switches, and inserting the module into the front of the shelf. NOTES Power supply
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The MA-402I module adapter is shown in Figure 1. This module is a two-port RS- 232 I/O which has two 9-pin D-subminiature (DC-9) connectors on its rear panel. Each of these 9-pin connectors is wired in a standard RS-232 configuration as shown in the table at the bottom of the figure. Each connector is labeled to show the corresponding port on the NCM module. The MA-485 module adapter shown in Figure 2 supports both 2-wire and 4-wire RS-485 applications. The 2-wire mode supports only half-
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MA402I 1 6 9 5 CH1 1 6 9 5 CH2 Pin No. Function 1 Receive Line Signal Detect* 2 Receive Data 3 Transmit Data 4 Not used 5 Signal Ground 6 Not used 7 Data Set Ready* 8 Clear To Send* 9 Not used * These signals always active Figure 1. MA-402I Module adapter, c
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MA485 TB1 TERMINATION 1 OUT 4W IDLE OUT J4 2 MARK IN 3 J2 OUT HI-Z 4 4W J3 5 IN J1 6 2W Jumper Function TB1 Pin No. Function J1 Selects 2W or 4W operation 1 TDB (+) 2 TDA (-) J2 In 4W operation, selects MARK or HI-Z as follows: In “MARK” position, forces the transmission of “All Marks” 3
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LINK LED (Ethernet Link is MA490 connected when LED is illuminated) MA-490 LINK ACT ACT LED 1 (Ethernet Data is active when LED is NET illuminated) 8 1 6 CRAFT RJ-45 Ethernet Port 9 Pin Signal 5 1 E_Tx+ J3 J1 J2 2 E_Tx- NCM NCM NCM NCM NCM NCM 3 E_Rx+ 1 6 4
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9. Select an unused time slot for the NCM using DIP switches SW2-1 through SW2-5. The NCM uses one 64 Kbps digital time slot within the multiplexer’s aggregate rate. Set the time slot using direct binary coding as shown in Table 4. Refer to the multiplexer manual for guidelines on time slot selection. Note that selecting an invalid time slot will disable the module. In T1 systems, only time slots 1 through 24 are allowed. In E1 systems, time slots 1 through 31 are allowed, however,
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1 3 5 7 9 11 32 38 43 40 41 42 24 37 25 26 27 36 34 2 4 6 8 10 12 15 23 16 17 18 13 39 14 19 20 21 22 29 31 30 28 33 35 Figure 4. Controls and indicators, RFL NCM, Network Communications Module 1 3 5
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14. Set DIP switches SW6-7 and SW6-8 to set the word length (number of bits per character) in accordance with Table 1. If the system application mode is NMS, the word length must be set to the same word length as the local common module. Otherwise, any word length can be used. NOTE In any Application Mode, the Baud Rate, Parity and Word Length settings of the NCM must match at all nodes in the network. Additionally, In the NMS application mode, the Baud Rate, Parity and Word Length set
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15. (continued). If some of the nodes in a T1/E1 network have an NCM, and others do not as shown in Figure 7, the address Pass Setting will be set differently at some of the nodes. In Figure 7, nodes 1, 2 and 3 have NCM modules, and nodes 4 and 5 do not have NCM modules. This network requires that at nodes 1 and 2, SW7 is set as follows: Place SW7-1 in the DOWN position Place SW7-2 in the UP position And at node 3, SW7 is set as follows: Place SW7-1 in the UP position Place
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Table 1. Controls and indicators, RFL NCM Module Item Name/Description Function 1 IN1 LED DS1 Lights (GREEN) when Port 1 Input Data is active and no errors detected Lights (RED) when Port 1 Input Data is active and errors are detected Lights (flashing RED) when Port 1 Rogue detector is active LED is (OFF) when Port 1 Input Data is idle 2 OUT1 LED DS2 Lights (GREEN) when Port 1 Output Data is active and no errors detected Lights (RED) when Port 1 Output Data is active
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Table 1. - continued, Controls and indicators, RFL NCM Module Item Name/Description Function 15 DIP Switch, SW2 SW2-1 to SW2-5 Selects Time Slot (See Table 4) SW2-6 Selects Transmit on A Receive on B DOWN = enables Transmit on A, Receive on B UP = disables Transmit on A, Receive on B SW2-7 Selects transmit on B receive on A DOWN = enables
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Table 1. - continued, Controls and indicators, RFL NCM Module Item Name/Description Function 20 DIP Switch, SW7 SW7-1 to SW7-2 Selects CM address pass setting in NMS application mode only in accordance with the table below. In all other application modes, these switch settings are ignored. SW7-1 SW7-2 (ADR
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Table 1. - continued, Controls and indicators, RFL NCM Module Item Name/Description Function 23 DIP Switch, SW10 SW10-1 to SW10-2 Selects Loopback operation in accordance with the table below: SW10-1 SW10-2 (LB1) (LB2) Loopback Setting Down Down Enable port 2
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Table 2. Application Modes And Bus Settings NMS Transmit on A Transmit on B Application Application Receive on B Receive on A Mode (SW2-6) (SW2-7) (SW7-4, SW7-5 & SW7-6) Broadcast enabled disabled The NCM mode will be Terminal broadcast or DI-A broadcast disabled enabled The NCM mode will be DI-B broadcast enabled enabled The NCM mode will be D&I broadcast disabled disabled (Not a valid setting. The NCM module is disabled) NMS enabled disabled The NCM mode will be Terminal NMS
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Table 3. SCB address settings, RFL NCM module Module Address SW1-1 SW1-2 SW1-3 SW1-4 SW1-5 SW1-6 1 DOWN DOWN DOWN DOWN DOWN UP 2 DOWN DOWN DOWN DOWN UP DOWN 3 DOWN DOWN DOWN DOWN UP UP 4 DOWN DOWN DOWN UP DOWN DOWN 5 DOWN DOWN DOWN UP DOWN UP 6 DOWN DOWN DOWN UP UP DOWN 7 DOWN DOWN DOWN UP UP UP 8 DOWN DOWN UP DOWN DOWN DOWN 9 DOWN DOWN UP DOWN DOWN UP 10 DOWN DOWN UP DOWN UP DOWN 11 DOWN DOWN UP DOWN UP UP 12 DOWN DOWN UP UP DOWN DOWN 13 DOWN DOWN UP UP DOWN UP 14 DOWN DOWN UP
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Table 4. Time Slot Select for RFL NCM module Switch Switch Settings T1 E1 Code (Decimal) SW2-1 SW2-2 SW2-3 SW2-4 SW2-5 0 DOWN DOWN DOWN DOWN DOWN * * 1 DOWN DOWN DOWN DOWN UP 1 1 2 DOWN DOWN DOWN UP DOWN 2 2 3 DOWN DOWN DOWN UP UP 3 3 4 DOWN DOWN UP DOWN DOWN 4 4 5 DOWN DOWN UP DOWN UP 5 5 6 DOWN DOWN UP UP DOWN 6 6 7 DOWN DOWN UP UP UP 7 7 8 DOWN UP DOWN DOWN DOWN 8 8 9 DOWN UP DOWN DOWN UP 9 9 10 DOWN UP DOWN UP DOWN 10 10 11 DOWN UP DOWN UP UP 11 11 12 DOWN UP UP DOWN D
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16. If you plan to operate the NCM module under local control, perform the following steps; otherwise, go to step 17 for remote control. Local control is recommended for NMS application mode. a. Set to local control by placing DIP switch SW10-3 in the UP position. b. Turn service on by placing DIP switch SW10-4 in the UP position. c. Slide the module into the selected module slot until it is firmly seated and the module front panel is flush with the top and bottom of the shelf
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FUNCTIONAL DESCRIPTION Figure 8 is a block diagram of the RFL NMS module. It is provided to familiarize the user with the NMS signal flow and interfacing. The figure shows signal flow in the transmit and receive modes of operation. IN1 49.152 mHz OUT1 OSCILLATOR 3.3 V (U11) Actel IN2 FPGA (U2) OUT2 RXB TXA SW1 to FRONT SW10 RXA PANEL LEDs TXB EQLB PALB T1 & E1 BACKPLANE & CONT
