This section describes the functionality and limitations relating to circuit pack/slot equipage and electrical/optical port availability when the VLF Main circuit packs are used. Use this section to help plan the use of circuit packs in the Function and Growth units of a shelf equipped with VLF Mains.
Alcatel-Lucent 1665 DMX can be equipped with LNW59, LNW82, or LNW504 VLF Main circuit packs. These circuit packs support true 0x1 configurations, in some cases resulting in double the overall port density for a given interface type.
LNW59 pack supports up to two OC-192 interface and provides a total 140G of Input/Output interfaces. The LNW59 has 180G of usable STS-1 fabric and 30G of usable VT fabric.
LNW504 pack supports up to 4 OC-192 interfaces or up to 3 OC-192 interfaces and 4 OC-48 interfaces and has integrated STS and VT fabrics. Although mixing of interface rates is supported, OC-48 interfaces are only supported on ports 5–8, and OC-192 interfaces are only supported on ports 1–4. The backplane interfaces can operate at 10 Gb/s, supporting all VLF-compatible low-speed packs. The LNW504 provides a total of 180G of Input/Output interfaces. The LNW504 has 220G of usable STS-1 fabric and 30G of usable VT fabric.
The LNW82 main pack supports 8 PTM-based multi-rate (OC-3, OC-12, OC-48) ports and integrated STS and VT fabrics. The pack supports a maximum of 8 OC-3 interfaces, 8 OC-12 interfaces or 2 OC-48 interfaces. The LNW82 has a 170G non-blocking, STS fabric and a 20G VT fabric. VLF mains can support 10G per slot or 20G per function/growth group. The pack supports up to 10G of VT1.5s.
Function Groups A, B, C, and D are general purpose slots and support all low-speed circuit packs (except the LNW7).
Function Group G is referred to as the growth slot. The growth slot supports only optical, low-speed circuit packs, these include all of the OC-3/12/48/192 packs, the LNW705 and LNW785, as well as the LNW63, LNW64, LNW73/73C, LNW74, LNW87, and LNW170 packs. Growth slots can also house LNW20 TransMUX packs functioning in portless mode.
VLF Mains provide up to 10G add/drop capacity to each low-speed slot in the shelf.
Function groups D and G have an STS add/drop capacity of 48 STS-1s.
Function Groups A, B, C, and D support up to 48 ported TMUX DS3 or EC1 ports, 48 portless TMUX DS3 ports
However, there are certain restrictions with regard to which packs can reside next to each other in the same Function Unit or Growth slot. This section details these restrictions and provides general guidelines for circuit pack/slot equipage with the VLF Mains.
With VLF circuit pack in the Main slots, all switching and cross-connect functions are centralized on the STS and VT fabrics located on the VLF Main circuit pack. This is in contrast to shelves equipped with non-VLF Main circuit packs, where switching and cross-connection functions are distributed across the Main (high-speed) and tributary (low-speed) circuit packs/fabrics. When VLF Main circuit packs are used in conjunction with tributary packs that contain their own switch fabrics, the switch fabrics on the tributary circuit packs are automatically disabled.
The VLF Main circuit packs support all circuit packs supported by Alcatel-Lucent 1665 DMX shelf with the exception of the LNW7 28DS1 packs. Customers with VLF Mains requiring DS1 connectivity must employ the LNW8/LNW801 56DS1/E1 pack.
The 0x1 capability allows compatible packs of different types to reside in the same low-speed group. Generally speaking, packs which use the rear-access electrical backplane connectors are not compatible with any other packs; that is, they cannot be installed in adjacent slots within the same group. This includes LNW7, LNW8, LNW801, LNW16, LNW18, LNW19B, LNW20, LNW66 and LNW74 (unless both LNW74s are version S1:2 or later and in FX mode).
Certain circuit pack/slot equipage guidelines are the same whether VLF or non-VLF Mains are used. The use of electrical ports on the LNW170 are not restricted when these packs are installed in the Growth slots because their electrical interfaces are confined to the faceplate only.
Important!
When the LNW74 is installed in the Growth slots, only the optical ports are functional. The electrical interfaces on the LNW74 are backplane only and cannot function in the Growth slot. VLF Mains must be used to support true 0x1 with the LNW74s.
Important!
When the LNW20 is used in the Growth slots, it will only function in portless DS3 mode.
In the following list of compatibility guidelines, "Ethernet" includes Ethernet and SAN packs, "electrical" not modified by "TDM" refers to any pack that uses rear-access backplane connectors, and "TDM electrical" excludes Ethernet and Data packs. Note that "electrical" does not include Ethernet/Data packs using electrical PTMs.
Listed below are circuit pack combinations that are incompatible for 0x1 configurations:
All other packs are compatible with each other for 0x1 configurations:
non-electrical 0x1-compatible Ethernet pack/non-electrical 0x1-compatible Ethernet pack
OLIU/0x1-compatible Ethernet pack (whether electrical or not)
electrical 0x1-compatible Ethernet pack/non-electrical 0x1-compatible Ethernet pack
The table below summarizes the guidelines detailed above for 0x1 compatible pack combinations within the same group. An OLIU is in 0x1 mode when all ports in the OLIU are set to the 0x1 application.
|
Circuit Pack Type | |||
|---|---|---|---|
|
Slot 2 |
Slot 1 | ||
|
Rear Access |
Mixed Front and Rear Access |
Front Access | |
|
Rear Access |
Not Compatible |
Not Compatible |
Compatible |
|
Mixed Front and Rear Access |
Not Compatible |
Not Compatible |
Compatible |
|
Front Access |
Compatible |
Compatible |
Compatible |
Front access packs include all OLIUs (Optical Line Interface Units), and the following Ethernet/Data packs: LNW63, LNW64, LNW73/73C, LNW87, and LNW170.
If the Main slots are equipped with Very Large Fabric LNW59, LNW82, or LNW504 OLIU circuit packs, the circuit packs in a Function/Growth group may be the same or different circuit pack type depending on the Slot Protection State.
For Ethernet circuit packs except the LNW170, the Slot Protection State parameter is fixed Unprotected. If the Slot Protection State is Protected and a 10/100 Ethernet circuit pack (other than the LNW170) is installed, the system reports an unexpected CP type alarm and service may be impacted.
The following combinations of circuit pack types are supported in Function/Growth Slot 1 and Slot 2 when the Slot Protection State is Unprotected.
|
Slot 2 |
Slot 1 | ||
|---|---|---|---|
|
LNW66 |
LNW74 (S1:2 and later) |
Other Front Access Circuit Packs 1 | |
|
LNW66 |
Not compatible |
Not compatible |
Compatible |
|
LNW74 (S1:2 and later) |
Not compatible |
Compatible 2 |
Compatible |
|
Other Front Access Circuit Packs 1 |
Compatible |
Compatible |
Compatible |
This includes the LNW63, LNW64, LNW73/73C, LNW87, LNW170, LNW705, LNW785, and all low-speed OLIU circuit packs. The LNW7, LNW8, LNW16, LNW18, LNW19B, LNW20, , LNW74 (S1:1), and LNW801 are not 0x1 compatible.
The circuit pack Ethernet Mode parameter must be provisioned as FX to support LNW74 circuit packs in slot 1 and slot 2; otherwise, this configuration is incompatible. When pairing the LNW74 with another LNW74, ONLY the 8 SFP ports on each pack are usable, for a total of 16 SFP ports per function group. When mixing an LNW74 with any optical only pack, all 24 ports (16 electrical and 8 SFP ports) on the LNW74 are available.
If an incompatible circuit pack is installed in a Function/Growth slot, the system reports a CP not allowed - eqpt alarm.
The Slot Protection State parameter can be changed from Protected to Unprotected or from Unprotected to Protected.
| November 2011 | Copyright © 2011 Alcatel-Lucent. All rights reserved. |