Instruction/ maintenance manual of the product NWK954 Mitel
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The NWK954 is a fully integrated, unmanaged, 4-port Fast Ethernet Repeater conforming to the IEEE 802.3 100BASE-TX Standard. The device integrates the 802.3 Repeater functions with four 100BASE-TX PHY modules, enabling direct connection to the isolation transformers with no additional PHY components.
NWK954 2 QUAD RJ45 QUAD MAGNETICS NWK954 QUAD MAGNETICS NWK954 QUAD MAGNETICS NWK954 QUAD MAGNETICS NWK954 QUAD MAGNETICS NWK954 QUAD MAGNETICS NWK954 CLOCK DRIVERS OSCILLA TOR BACKPLANE BUFFERS BACKPLANE CONTROLS LOCAL EXP ANSION BUS Hub 0 Hub 1 Hub 2 Hub 3 Hub 4 Hub 5 Hub 6 Hub 7 Fig.
NWK954 3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 33 34 35.
NWK954 4 PORT 0 TRANSCEIVER P0_TXOP P0_TXON P0_TXREF P0_RXIP P0_RXIN PORT 1 TRANSCEIVER P1_TXOP P1_TXON P1_TXREF P1_RXIP P1_RXIN PORT 2 TRANSCEIVER P2_TXOP P2_TXON P2_TXREF P2_RXIP P2_RXIN PORT 3 TRAN.
NWK954 5 Basic Repeater Function The Repeater Controller monitors activity on the 4 twisted pair ports and on the Expansion Port. When a packet is received on one of the twisted pair ports it is forwarded to the other 3 twisted pair ports and to the Expansion Port.
NWK954 6 BP ACTIN_ N [7:1] LACTIN_N [5:1] LACTOUT_N BPCOLIN_N BPCOL_N BPCLK IRD [4:0] TXCLKIN BP ACTIN_ N [7:1] LACTIN_N [5:1] LACTOUT_N BPCOLIN_N BPCOL_N BPCLK IRD [4:0] TXCLKIN BP ACTIN_ N [7:1] LAC.
NWK954 7 The IRD bus in each hub is connected to the 5-bit backplane bus via a bidirectional buffer . This allows data to be driven from any hub to all other hubs in the stack. The bidirectional buf fer is controlled by 2 control signals (BPDOE_N and BPDIE_N) which can be taken from any one of the NWK954 devices in the hub.
NWK954 8 100BASE-TX Receiver The 100BASE-TX receiver recovers data from up to 140m of Cat5 UTP cable. Received data is decoded and descrambled and presented to the repeater controller as 5-bit symbols.
NWK954 9 PIN DESCRIPTIONS Active low signals are denoted by the _N suf fix; all other signals are active high Network Interface Signal P0_RXIP P0_RXIN P0_TXOP P0_TXON P0_TXREF P1_RXIP P1_RXIN P1_TXOP .
NWK954 10 Expansion Port (Continued) Signal BP ACTIN_N7 BP ACTIN_N6 BP ACTIN_N5 BP ACTIN_N4 BP ACTIN_N3 BP ACTIN_N2 BP ACTIN_N1 BPDIE_N BPDOE_N BPCLK BPCOL_N BPCOLIN_N BPCOLOE_N T ype Digital input, n.
NWK954 11 LED Drivers Signal COLLED_N P0_RXLED_N P1_RXLED_N P2_RXLED_N P3_RXLED_N P0_ERLED_N P1_ERLED_N P2_ERLED_N P3_ERLED_N ACTLED_N4 ACTLED_N3 ACTLED_N2 ACTLED_N1 ACTLED_N0 T ype Standard digital o.
NWK954 12 Power Signal DIGGND[5: 1] DIGVDD[5: 1] DIGGND6 DIGVDD6 SUBVDD[2:1] VREFGND VREFVDD P0_TXGND[3:1] P0_TXVDD[3:2] P0_RXGND[3:1] P0_RXVDD[3:1] P1_TXGND[3:1] P1_TXVDD[3:2] P1_RXGND[3:1] P1_RXVDD[3:1] P2_TXGND[3:1] P2_TXVDD[3:2] P2_RXGND[3:1] P2_RXVDD[3:1] P3_TXGND[3:1] P3_TXVDD[3:2] P3_RXGND[3:1] P3_RXVDD[3:1] Pin no.
NWK954 13 POWER SUPPLY Recommended Operating Conditions apply except where otherwise stated Supply voltage Supply current Characteristic Min. Typ. Max.
NWK954 14 AC ELECTRICAL CHARACTERISTICS Recommended Operating Conditions apply except where otherwise stated TXCLK and RESET_N Typ. Max. TXCLKIN Frequency Duty cycle RESET_N Pulse width 55 - MHz % ns Units Conditions Characteristic Value 25 ± 100ppm - f TCLK t WRES Symbol Min.
NWK954 15 Fig. 8 External components 1:1 MAGNETICS VALOR ST6184 BEL 5558-5999-74 RXON3 RXOP3 RXOC3 TXIP3 TXIN3 TXIC3 TXIC2 TXIN2 TXIP2 RXOC2 RXOP2 RXON2 RXON1 RXOP1 RXOC1 TXIP1 TXIN1 TXIC1 TXIC0 TXIN0.
NWK954 PACKAGE DETAILS Dimensions are shown thus: mm (in). 31·65/32·15 (1·246/1·266) 3·60/4·00 (0·142/0·157) PIN 1 IDENT PIN 128 27·90/28·10 (1·098/1·106) SQ. 128-LEAD PLASTIC QUAD FLA TP ACK – GP128 0·13/0·20 (0·005/0·008) 3·35/3·60 (0·132/0·142) 0 ° - 7 ° 24·80 (0·976) NOM.
An important point after buying a device Mitel NWK954 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Mitel NWK954 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Mitel NWK954 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Mitel NWK954 you will learn all the available features of the product, as well as information on its operation. The information that you get Mitel NWK954 will certainly help you make a decision on the purchase.
If you already are a holder of Mitel NWK954, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Mitel NWK954.
However, one of the most important roles played by the user manual is to help in solving problems with Mitel NWK954. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Mitel NWK954 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
