This section briefly describes Alcatel-Lucent 1665 DMX circuit packs that are DA'd and no longer orderable. These packs could be present in your existing network.
The SYSCTL provides communication with other circuit packs on the Alcatel-Lucent 1665 DMX shelf. The SYSCTL supports all Alcatel-Lucent 1665 DMX operations interfaces, including IAO LAN (OSI or TCP/IP), TL1/X.25, PC-CIT, office alarms, and miscellaneous discretes. The SYSCTL also supports DCC terminations for each optical line interface.
The SYSCTL faceplate has push-button switches, alarm/status LEDs, and a 7-segment numeric display to facilitate local operations. The SYSCTL provides redundancy by duplicating all cross-connect information on the OLIU circuit packs. Transmission is not affected if the SYSCTL fails.
The SYSCTL circuit pack provides a microprocessor, nonvolatile memory to store the generic program software and provisioning database, and additional memory for system operation. The SYSCTL circuit pack also has interfaces across the backplane to monitor and control every circuit pack in the shelf.
The SYSCTL supports PC-CIT front access to the Alcatel-Lucent 1665 DMX via the IAO LAN and a serial RS-232 port located on the back of the Alcatel-Lucent 1665 DMX shelf.
The LNW6 is not supported when Alcatel-Lucent 1665 DMX is equipped with VLF Main packs. LNW6 contains 28 DS1 ports that can be cross-connected to VT1.5 timeslots when the system is operating with a UPSR, 1+1, or BLSR Main interface. Hairpin cross-connections to OCn and other electrical interfaces are also supported. This circuit pack is 1x1 protected, and non-revertive protection switching is supported. Line build-outs and DS1 signal encoding are software provisionable. This circuit pack terminates up to 28 bidirectional DS1 electrical signals and supports the transport of DS1 signals coded in either alternate mark inversion (AMI) or bipolar 8-zero substitution (B8ZS) modes. The signals received from the DSX-1 are mapped into SONET VT1.5 signals and then routed to the high-speed OLIU circuit pack.
The LNW6 circuit pack can occupy Function Unit groups A, B, C, and D. All electric interface circuit packs are 1x1 hardware protected. So, although both slots in each function group can house a LNW6 circuit pack, one slot in each function group populated by LNW6 circuit pack is always used for hardware protection. Thus the Alcatel-Lucent 1665 DMX shelf supports up to 112 working ports when four Function Unit groups are equipped with the LNW6 circuit pack.
In addition to maintenance and provisioning functions, the 28DS1PM circuit pack provides performance monitoring capabilities.
Whenever upgrading LNW6 to LNW7 circuit packs, it is necessary to first install an LNW8 circuit pack to ensure that the upgrade is completed without loss of service.
The 48DS3/EC1 (LNW19) circuit pack can be used only in the high capacity shelf, contains 48 ports, is 1x1 protected, and supports nonrevertive protection switching. The 48DS3/EC1 circuit pack provides bidirectional transport of 48 DS3/EC-1 signals and maps the DS3/EC-1 signals into corresponding STS-1 signals, and supports transport of DS3 signals coded in bipolar 3-zero substitution (B3ZS). DS3 or EC-1 service is provisionable on a per-port basis within each pack.
The LNW19 may occupy Function Unit groups A, B, C, and D, on the Alcatel-Lucent 1665 DMX shelf. All electric interface circuit packs are 1x1 hardware protected. So, although both slots in each function group can house a LNW19 circuit pack, one slot in each function group populated by LNW19 circuit pack is always used for hardware protection. Thus the Alcatel-Lucent 1665 DMX shelf supports up to 192 working ports when four Function Unit groups are equipped with the LNW19 circuit packs.
The OC-48 OLIU (LNW26) high speed circuit pack is a long reach 1310 nm optical line interface unit. The LNW26 supports OC-48 add/ drop, BLSR and UPSR configurations, single- and dual-homing, nonrevertive protection switching, and VT1.5, STS-1, STS-3(c), STS- 12(c), and STS-48(c) signal transport. The LNW26 OLIU can crossconnect VTs in any 6 of 48 selected STS-1s. The stratum 3 timing generator and central TDM switch fabrics are embedded in the OC-48 OLIU.
The LNW26 may occupy Main slots 1 and 2. Fiber access is provided via a pair of LC-type connectors on the LNW26 faceplate.
The LNW26B high-speed circuit pack is a long reach OC-48, 1310 nm optical line interface unit. The LNW26B supports OC-48 add/drop, BLSR and UPSR configurations, single- and dual-homing, non-revertive linear and bidirectional 1+1 protection switching, and VT1.5, STS-1, STS-3(c), STS-12(c), and STS-48) signal transport. The LNW26B pack can cross-connect VTs in 12 of 48 STS-1s of the OC-48 signal. The Stratum 3 timing generator and central TDM switch fabrics are embedded in the OC-48 OLIU.
The LNW26B may occupy Main slots 1 and 2. Fiber access is provided via a pair of LC-type connectors on the LNW26B faceplate.
The LNW28 has the same capabilities as the LNW26B circuit pack. It is, however, designed specifically for outside cabinet deployment and has been certified to withstand extreme temperatures.
The OC-48 OLIU (LNW28) high-speed circuit pack is a long reach 1310 nm optical line interface unit. The LNW28 supports OC-48 add/ drop, BLSR and UPSR configurations, single- and dual-homing, nonrevertive linear and bidirectional 1+1 protection switching, and VT1.5, STS-1, STS-3(c), STS-12(c), and STS-48(c) signal transport. The LNW28 can cross-connect 12 of 48 selected STS-1s. The Stratum 3 timing generator and central TDM switch fabrics are embedded in the OC-48 OLIU.
The LNW28 may occupy Main slots 1 and 2. Fiber access is provided via a pair of LC-type connectors on the LNW28 faceplate.
The LNW32 high-speed circuit pack is a long-reach, OC-48, 1310 nm optical line interface unit. The LNW32 supports OC-48 add/drop, BLSR and UPSR configurations, single- and dual-homing, non-revertive linear and bidirectional 1+1 protection switching, and VT1.5, STS-1, STS-3(c), STS-12(c), and STS-48(c) signal transport. The Stratum 3 timing generator and central TDM switch fabrics are embedded in the OC-48 OLIU.
The LNW32 circuit pack can cross-connect VTs in all 48 STS-1s of the OC-48 signal.
The LNW32 may occupy Main slots 1 and 2. Fiber access is provided via a pair of LC-type connectors on the LNW32 faceplate.
The LNW32 is hardened for outside plant (OSP) temperature ranges.
The quad OC-3 OLIU low-speed circuit pack is a four-port, long-reach, 1310 nm optical line interface unit supporting VT1.5, STS-1 and STS-3c path switching. LNW36 supports VT mapping in 12 STS-1s. The LNW36 can interface with other OC-3 rings in the network and can also be used as an interface for OC-3 linear optical extensions, as well as single- and dual- homed ring extensions. Fiber access is provided via four pairs of LC-type connectors on the LNW36 faceplate.
The LNW36 can occupy any Function Unit group on the Alcatel-Lucent 1665 DMX shelf (including Growth slots), and up to 40 ports are addressable when all Function Unit groups are equipped with the LNW36 circuit pack.
The dual OC-12 OLIU (LNW46) low-speed circuit pack is a two-port, long-reach, 1310 nm optical line interface unit supporting VT1.5, STS-1, STS-3(c), and STS-12(c) path switching. LNW46 supports VT mapping in 12 STS-1s. The LNW46 provides an OC-12 interface to other OC-12 rings, linear optical extensions, and single- and dual-homed ring extensions. Fiber access is provided via two pairs of LC-type connectors on the LNW46 faceplate.
The LNW46 can occupy any Function Unit group on the Alcatel-Lucent 1665 DMX shelf (including Growth slots), and up to 20 ports are addressable when all Function Unit groups are equipped with the LNW46 circuit pack.
The LNW54 high-speed circuit pack is a long-reach, OC-12 1550 nm circuit pack. The LNW54 supports OC-12 add/drop, UPSR configurations, single- and dual-homing, non-revertive 1+1 linear protection switching, and VT1.5, STS-1, STS-3(c), and STS-12(c) signal transport. The LNW54 OLIU can cross-connect VTs in 12 of 12 STS-1s. The Stratum 3 timing generator and central TDM switch fabrics are embedded in the OC-12 OLIU.
The LNW54 may occupy Main slots 1 and 2. Fiber access is provided via a pair of LC-type connectors on the LNW54 faceplate.
The LNW54 is hardened for outside plant (OSP) temperature ranges.
The LNW57 high-speed circuit pack is a long-reach (80 km) OC-192 1533.47 nm circuit pack. The LNW57 supports OC-192 add/drop, UPSR, and BLSR configurations, single- and dual-homing, non-revertive linear and bidirectional 1+1 protection switching, and VT1.5, STS-1, STS-3(c), STS-12(c), and STS-48(c) signal transport. The LNW57 circuit pack can cross-connect VTs in any 48 of 192 STS-1s in the OC-192 signal. The Stratum 3 timing generator and central TDM switch fabrics are embedded in the OC-192 OLIU.
The LNW57 circuit pack may occupy Main slots 1 and 2. Fiber access is provided via a pair of LC-type connectors on the LNW57 faceplate.
The LNW57 circuit pack utilizes a "dither tone" to frequency modulate the laser. This technique is used to minimize the effects of Stimulated Brillouin Scattering (SBS). At high optical launch powers, SBS can cause an acoustic back-scattering phenomenon in fibers. The dither tone effectively broadens the spectrum of the narrow optical pulse, thus raising the threshold power where SBS becomes an issue.
Normally, Alcatel-Lucent recommends that optical output of the OC-192 circuit packs be amplified to no more than +10 dBm. However, with the dither tone circuit incorporated into the LNW57 circuit pack, optical amplification of this circuit pack to much higher power levels is acceptable.
For fibers carrying multiple wavelengths in DWDM systems, it should be noted that the individual channel (individual wavelength) power determine the SBS threshold, not the total composite power of all the channels.
The LNW60 circuit pack is based on the LNW57 circuit pack. It has the same characteristics, capabilities, and specifications as the LNW57 circuit pack, but it also includes an on-board, integrated optical amplifier. When the on-board amplifier is in use, the LNW60 circuit pack is capable of bridging spans of up to 127 km. The LNW60 circuit pack presents the possibility of savings in CAPEX, OPEX (no separate management for external optical amplifier required), and space.
The LNW66 circuit pack has 24 10/100T Fast Ethernet ports and provides data transport at the rate of 10/100 Mbps using standard Ethernet switching IEEE 802.1, standard encapsulation, and standard STS-1 virtual concatenation according to ITU G.707. The LNW66 can transmit signals across spans as long as 100 meters. Each LNW66 circuit pack can support 1 packet ring. The LNW66 is an unprotected pack.
Alcatel-Lucent 1665 DMX does not allow installation of two packs with electrical interfaces in adjacent slots within the same Function Unit or Growth Group (other than an equipment-protected pair). Therefore, in systems equipped with VLF mains, LNW66 packs can reside in either Slot 1 or Slot 2 of a group, but not both at the same time. Telcordia ® only supports electrical packs in Slot 1 of a group. However, another optical (Ethernet or SONET) pack may be installed in the other slot. In non-VLF equipped shelves, LNW66 can only occupy Slot 1 of a particular group. When the LNW66 circuit pack occupies slot 1 of a Function Unit group, slot 2 must be populated with an apparatus blank.
This 2-port Ethernet interface provides short-reach high-speed optical data transport at the rate of 1 Gb/s using standard Ethernet switching IEEE 802.1, standard encapsulation, and standard STS-1 virtual concatenation according to ITU G.707.
The LNW67 is an unprotected pack. Fiber access is provided by two LC-type connector pairs on the LNW67 faceplate. The LNW67 transmits signals at a wavelength of 850 nm. The LNW67 requires the use of multimode fiber cable. Each LNW67 circuit pack can support 2 packet rings or 2 GbE private lines (protected or unprotected).
When Alcatel-Lucent 1665 DMX is not equipped with VLF Main packs, LNW67 packs can only be placed in Slot 1 of any function group or growth slot in the shelf (A1-G1). Alcatel-Lucent 1665 DMX support a total add/drop capacity of 10 optical GbE ports if all slots are equipped with LNW67 circuit packs.
When Alcatel-Lucent 1665 DMX is equipped with VLF Main packs, Ethernet packs can occupy both Slot 1 and 2 of a Function or Growth Unit (where applicable). With VLF Mains and all tributary slots populated with LNW67 packs, Alcatel-Lucent 1665 DMX provides a total add/drop capacity of 20 optical GbE ports.
When VLF Mains are not used, if the LNW67 circuit packs occupy slot 1 of a Function Unit group, slot 2 must be populated with an apparatus blank.
1000BASE-LX (LNW68) optical Ethernet interface While providing the same functionality as the 1G SX interface, the LNW68 supports long-reach optics. LNW68 transmits signals at a wavelength of 1310 nm. The LNW68 requires the use of single-mode fiber cable. Each LNW68 circuit pack can support 2 packet rings.
The LNW70 circuit pack provides four 1000BASE-X (SX, LX, and/or ZX-very long reach 80km), IEEE 802.3-compliant (1000Mbps) GbE interfaces and four 100BASE-LX IEEE 802.3-compliant (100 Mbps) fast Ethernet interfaces. The LNW70 circuit pack provides Ethernet private line or switched services, with QoS. The LNW70 packs are not equipment protected, however, WAN facility protection is provided via SONET UPSR/BLSR or through the IEEE 802.1w (or 802.1d) spanning tree algorithm.
The LNW70 pack can also use electrical PTMs that are provisionable to support either 100BASE-T or 1000BASE-T traffic. The electrical FE (100BASE-T) PTMs can occupy ports 1–8. The GbE (1000BASE-T/X) PTMs are restricted to ports 1–4.
The LNW70 pack uses standard Ethernet switching (IEEE 802.1), standard encapsulation, and standard STS-1 virtual concatenation according to ITU G.707. Fiber access is provided by LC-type connector pairs on the LNW70 faceplate.
The LNW70 pack is unprotected by default. Support of Link Aggregation on LNW70 LAN ports is available to provide Ethernet facility protection.
When Alcatel-Lucent 1665 DMX is not equipped with VLF Main packs, the LNW70 pack can only occupy slot 1 of any Function Unit group on the shelf (including Growth slots). Up to 20 1000BASE-X and 20 100BASE-LX ports are addressable when all Function Unit groups are equipped with LNW70 circuit pack.
When Alcatel-Lucent 1665 DMX is equipped with VLF Main packs, Ethernet packs can occupy both Slot 1 and 2 of a Function or Growth Unit (where applicable). With VLF Mains and all tributary slots populated with LNW70 pack, up to 40 1000BASE-X and 40 100BASE-LX ports are addressable.
When VLF Mains are not used, if the LNW70 circuit pack occupies slot 1 of a Function Unit group, slot 2 must be populated with an apparatus blank.
The LNW70 pack feature Pluggable Transmission Module (PTM) electrical and optical interfaces. PTMs are “pluggable” in the sense that they can be plugged into a circuit pack as they become necessary. This allows customers to grow their network incrementally, only realizing the full cost for optics as the need to provision service on (and thus receive revenue from) them becomes necessary. LNW70 pack is purchased and shipped with no ports populated with functioning optics. The ports remain empty until the customer decides to place interfaces in them. The electrical FE (100BASE-T) PTMs can occupy ports 1–8. The GbE (1000BASE-T/X) PTMs are restricted to ports 1–4.
The LNW70 supports dual function electrical PTMs that are provisionable for 100 or 1000 Mbps traffic. The pack conforms to the IEEE802.3 standards for 100BASE-T and 1000BASE-T in the respective settings (IEEE802.3z and IEE802.3ab). Connectivity is provided for an RJ-45 Cat 5 cable and the PTM has a maximum span length of 100 meters.
The LNW71 circuit pack conforms to the same specifications as the LNW66 described above. Yet, rather than supporting packet ring transport (like the LNW66), the LNW71 circuit pack is designed specifically to support Fast Ethernet Private Line applications. Each LNW71 circuit pack can support 24 private lines. The LNW71 can also support STS-3(c) cross-connections instead of virtual concatenation.
The 10/100T-PL may occupy slot 1 of Function Unit groups A, B, C, and D, and 96 10/100T ports are addressable when four Function Unit groups are equipped with LNW71 circuit packs. When the LNW71 circuit packs occupy slot 1 of a Function Unit group, slot 2 must be populated with an apparatus blank.
The LNW77 circuit pack is a intermediate reach (20km), high-speed 1310 nm optical line interface unit. The LNW77 supports OC-48 add/ drop, BLSR and UPSR configurations, single- and dual-homing, nonrevertive linear and bidirectional 1+1 protection switching, and VT1.5, STS-1, STS-3(c), STS-12(c), and STS-48(c) signal transport. The Stratum 3 timing generator and central TDM switch fabrics are embedded in the OC-48 OLIU.
The LNW77 pack can cross-connect VTs in 12 of 48 STS-1s of the OC-48 signal.
The LNW77 may occupy Main slots 1 and 2. Fiber access is provided via a pair of LC-type connectors on the LNW77 faceplate.
This 8-port Ethernet interface provides 4 ports for short-reach and/or long-reach high-speed optical data transport at the rate of 1 Gb/s and 4 ports for optical 100BASE-LX transport at 100 Mbps. The first 4 ports (1–4) are for the GbE traffic (ports 3 and 4 are not currently available) and the second 4 ports (5–8) are for FE traffic. The LNW78 circuit pack utilizes PTM optics, allowing you to equip additional ports as necessary. LNW78 circuit pack also supports the electrical 100/1000BASE-T, electrical Ethernet PTM. This PTM may only occupy ports 1 and 2 of the pack.
The LNW78 circuit pack supports port, switching, and traffic management capabilities similar to the LNW70/170.
The LNW78 circuit pack supports standards compliant RPR switching per IEEE 802.17 and 802.1. The LNW78 circuit pack supports one RPR instance. The LNW78 circuit pack provides two internal Virtual Concatenation Group (VCG) WAN ports with a total capacity of 2.5 Gbps capacity for Ethernet RPR traffic (24 STS-1s in each direction).
VCG ports 17–22 are available to provide EoS connectivity. This feature allows EoS port connectivity to RPR ring interfaces via the faceplate of the LNW78 and/or hairpin cross-connects. Interconnection of multiple RPR rings on the same shelf or separate shelf using EoS VCGs is also supported. Finally, EoS traffic can be managed with QoS support on EoS VCGs.
Without a VLF Main pack, LNW78 circuit packs can only be placed in Slot 1 of a function group or growth group in the shelf (A1–G1) and Alcatel-Lucent 1665 DMX supported a total add/drop capacity of 10 RPR GbE ports and 20 RPR FE ports if all slots were equipped with LNW78 circuit packs.
With the use of true 0x1 and a VLF Main, LNW78 can occupy slots 1 and 2 of a Function or Growth group. This can increase the overall capacity of the system to 20 RPR GbE (optical only) ports and 20 RPR FE (optical only) ports per shelf.
When VLF Mains are not used, if an LNW78 circuit packs occupy slot 1 of a Function Unit group, slot 2 must be populated with an apparatus blank.
The Alcatel-Lucent 1665 DMX OC-48 DWDM OLIUs are optical port units designed for use with passive MUX/DMUX and optical add/drop shelves. This DWDM feature supports 32 different wavelengths. Each port unit supports two wavelengths via a special hardware configuration. These units are compatible with the SONET and SDH standards.
The optical port units are designed to be used with the Lucent Passive Optics Units (POUs). By using the DWDM port units and the POUs, you are able to increase fiber capacity by a factor of 16 or 32.
OC-48 DWDM OLIUs support add/drop, BLSR and UPSR configurations, single- and dual-homing, non-revertive linear and bidirectional 1+1 protection switching, and VT1.5, STS-1, STS-3(c), STS-12(c), and STS-48(c) signal transport. The Stratum 3 timing generator and central TDM switch fabrics are embedded in the OC-48 OLIU.
One set of OC-48 DWDM OLIUs can cross-connect VTs in any 12 of 48 selected STS-1s (LNW121B-159B). Another set of OC-48 DWDM OLIUs can cross-connect VTs in all 48 STS-1s of the OC-48 signal (LNW221-259)
The OC-48 DWDM OLIUs may occupy Main slots 1 and 2. Fiber access is provided via a pair of LC-type connectors on the OC-48 DWDM OLIU faceplate.
The Alcatel-Lucent 1665 DMX OC-48 DWDM OLIUs (LNW223–237, LNW245–255, and LNW259) are OLIUs designed for use with passive MUX/DMUX and optical add/drop shelves. This DWDM feature supports 26 different wavelengths. Each port unit supports two wavelengths via a special hardware configuration. These units are compatible with the SONET and SDH standards.
When the shelf is equipped with non-VLF mains, the DWDM circuit pack can cross-connect VTs in up to 48 STS-1s of the OC-N signal. When the shelf is equipped with VLF mains, all VT connections are performed in the Mains.
The low-speed OC-48 DWDM OLIUs (LNW421-459) are similar to those mentioned above, except that they are tributary interface circuit packs that any Function Unit group on the Alcatel-Lucent 1665 DMX shelf (including Growth slots), and up to 10 ports are addressable when all Function Unit groups are equipped with the low-speed DWDM circuit packs. These packs can cross-connect VTs in any 12 of 48 selected STS-1s. When the shelf is equipped with non-VLF mains, the PWDM circuit pack can cross-connect VTs in up to 12 STS-1s of the OC-N signal. When the shelf is equipped with VLF mains, all VT connections are performed in the Mains.
The OC-192 OLIU (LNW527) circuit pack is a DWDM optical line interface unit. This WDM pack supports OC-192 add/drop, UPSR, and BLSR configurations, single- and dual-homing, non-revertive linear and bidirectional 1+1 protection switching, and VT1.5, STS-1, STS-3(c), STS-12(c), and STS-48(c) signal transport. This circuit pack can cross-connect VTs in any 48 of 192 STS-1s in the OC-192 signal. The Stratum 3 timing generator and central TDM switch fabrics are embedded in the OC-192 OLIU.
The LNW527 circuit pack may occupy Main slots 1 and 2. Fiber access is provided via a pair of LC-type connectors on the LNW527 faceplate.
The LNW527 circuit pack employs tunable lasers that support 4 separate frequencies. The LNW527 lasers can be made to transmit different frequencies. This feature offers obvious advantages to single frequency circuit packs in that one pack may be ordered and used to support a variety of frequency requirements. Packs can be reused in applications requiring different frequencies and thus the need to order packs simply to support different frequencies can, in some cases, be avoided.
The OC-192 OLIU (LNW523/554) circuit pack is a DWDM optical line interface units. These DWDM packs support OC-192 add/ drop, UPSR, and BLSR configurations, single- and dual-homing, nonrevertive linear and bidirectional 1+1 protection switching, and VT1.5, STS-1, STS-3(c), STS-12(c), and STS-48(c) signal transport. These circuit packs can cross-connect VTs in any 48 of 192 STS-1s in the OC-192 signal. The Stratum 3 timing generator and central TDM switch fabrics are embedded in the OC-192 OLIU.
The LNW523/554 may occupy Main slots 1 and 2. Fiber access is provided via a pair of LC-type connectors on the LNW554 faceplate.
The LNW523/554 employ tunable lasers that support 4 separate frequencies on each of the three packs. The LNW523/554 lasers can be made to transmit different frequencies. This feature offers obvious advantages to single frequency circuit packs in that one pack may be ordered and used to support a variety of frequency requirements. Packs can be reused in new applications requiring different frequencies and thus the need to order new packs simply to support different frequencies can, in some cases, be avoided.
The OC-192 OLIU (LNW555) circuit pack is a long reach (80 km) 1533.47 nm optical line interface unit. The LNW555 supports OC-192 add/drop, UPSR, and BLSR configurations, single- and dual-homing, non-revertive linear and bidirectional 1+1 protection switching, and VT1.5, STS-1, STS-3(c), STS-12(c), and STS-48(c) signal transport. The LNW555 circuit pack can cross-connect VTs in any 48 of 192 STS-1s in the OC-192 signal. The Stratum 3 timing generator and central TDM switch fabrics are embedded in the OC-192 OLIU.
The LNW555 may occupy Main slots 1 and 2. Fiber access is provided via a pair of LC-type connectors on the LNW555 faceplate.
The Standard Shelf was DA'd June 2004 and was replaced with the High Capacity Shelf that incorporated additional DS1/DS3 D-SUB cable connectors on the rear of the shelf to support 224 DS1s or 192 DS3s. In order to support this amount of traffic, the High Capacity Shelf must be equipped with new, higher density DS1 and DS3 circuit packs that became available in Release 3.1.
The following circuit packs cannot be installed in the Standard Shelf. They are only supported in the High Capacity Shelf.
Packs that require VLF mains: LNW55, LNW62, LNW64, LNW603, LNW910
High-density packs that require the High Capacity Shelf: LNW8, LNW801, LNW19, LNW19B, LNW20
The dimensions of the Standard Shelf (848632956) are
In the Standard Shelf, the fan unit is a separate entity and is mounted above the shelf. It is the same width and depth as the standard shelf. Dimensions of the Standard Shelf including fan unit are
The 20 Amp version of the High-Capacity shelf was DA's 10/2012. The 30 Amp High-Capacity shelf is the replacement. The 20 Amp version contains the same functionality as the 30 Amp High-Capacity shelf, but it is limited to a total current drain of 20.0 amps. In applications where the planned equipage will never exceed 20.0 amps, power cables can be sized accordingly, thus enabling a considerable savings in power cable investment.
Important! With VLF Main packs, overload and overheating in the 20-amp shelf is possible given certain combinations of circuit packs in the low-speed slots.
VLF Main packs are not necessarily precluded from use in the 20 Amp shelf, but there are four configurations that could cause power issues if you lose one power feed or circuit breaker, the shelf’s current drain will exceed the 20.0A capacity of the remaining circuit breaker and your shelf will lose power:
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