Adtran TA3000 (Rural DSLAM) Notes

Transcription

1 Adtran TA3000 (Rural DSLAM) Notes The Adtran TA3000 will be connected to a Host C.O. Alcatel 7300 DSLAM as illustrated in the diagram below. The TA3000 and Alcatel 7300 communicate using IMA (Inverse Multiplexing over ATM) technology across DS1 links connecting the two locations. IMA (Inverse Multiplexing over ATM) is a process that takes a single, high-speed, cell stream and splits it across several physical links (e.g., DS1 lines) then re-assembles the links on the far end. IMA is a cost-effective solution for users who need more bandwidth than a T1 can provide but don t require the bandwidth of a full DS3. IMA allows the bonding of multiple T1s (DS1s) to provide a 3, 6, 9, or 12 Mbps logical channel for transporting ATM data from the Adtran TA3000 to the Alcatel The second and third TA3000 shelves attach to the first TA3000 shelf (or host shelf) using quad IMA connections providing 6 Mbps of bandwidth between shelves.

2 One Alcatel 7300 DSLAM can serve as a Host to multiple rural C.O. TA3000 DSLAMs as shown below.

3 The Adtran TA3000 shelf has 31 slots: These are referred to as the SCU slot; the A & B slots; and slots Note - Blank Filler cards should be placed in all vacant slots to ensure forced air is pulled through the air filter and not through any open slots.

4 SCU card (System Control Unit) provides a user-friendly interface to the TA3000 platform. The SCU uses SNMP to communicate back to the EMS (Element Management System). The SCU also handles all communications within the shelf to each card. Failure of the SCU only affects remote access to the shelf; it doesn t affect customer DSL service. Normal condition HST and ACO Green; FSE and ALM are off.

5 SCU card (continued) The TA3000 may be accessed via a RS-232 DB craft access port connector located on the front panel of the SCU. This port permits local provisioning prior to establishing the remote communications channel, or used when remote communication channels are unavailable. Parameters are VT100, 9600, 8 data bits, no parity, 1 stop bit, and no flow control. The Account Name can be ADMIN, TEST, READWRITE, or READONLY depending on the level of security required. The default password is PASSWORD.

6 CSM card (Cell Switch Module) The CSM card is the heart of the TA3000 platform. The CSM is a full ATM switch and can handle all service types, such as Constant Bit Rate (CBR), Variable Bit Rate (VBR, and Unspecified Bit Rate (UBR). The CSM also performs all buffering and policing of ATM streams. The CSM supports 128 ATM ports and up to 512 PVCs (Permanent Virtual Circuits). The CSM occupies slot A on the TA3000 shelf and is the Primary CSM. Slot B is available for a Backup CSM card; however AT&T is not utilizing Backup CSMs at this time.

7 The ADSL-C with POTS Splitter cards occupy two TA3000 slots in slots The ADSL-C with POTS Splitter transports cells between the incoming loop and the CSM via the backplane. Each ADSL-C card is always assigned the odd # slot (up to slot 23) and the POTS Splitter unit is assigned the even # slot (up to slot 24). Each ADSL-C with POTS Splitter combination provides 8 DSL ports. 12 X 8 = 96 ports per shelf. *Note If a POTS Splitter card must be replaced, the correlating ADSL-C card must be removed before unplugging the POTS Splitter card.

8 Illustration below shows left side of TA3000 shelf. Left-to-right is the SCU card, the CSM card, a blank filler card, and 3 sets of ADSL-C and POTS Splitter cards.

9 Quad and Octal IMA cards The Quad or Octal IMA card provides for the connection between the Alcatel 7300 Host and the Adtran TA3000 DSLAM. The IMA card takes a single cell-stream from the CSM card and multiplexes it onto 1 to 8 DS1 links connected to the Host C.O. The downstream direction cards occupy slots 25 & 26. The upstream direction cards occupy slots 27 & 28.

10 Cell-flow from the Host C.O. to the subscriber through the TA3000 is shown below. Multiple TA3000 shelves (shelf #2 and #3) are connected to the Host C.O. through Shelf #1 s IMA card. If the C.O. is using 1 shelf, there will be 4 DS1s connecting rural C.O. to the Host C.O. If the C.O. is using 2 shelves, there will be 6 DS1s connecting rural C.O. to the Host C.O. If the C.O. is using 3 shelves, there will be 8 DS1s connecting rural C.O. to the Host C.O. If a C.O. is to have more than 288 DSL subscribers, then the TA3000 Rural DSLAM architecture should not be deployed.

11 Backplane cable connectors & Hydra Cable The TA3000 backplane has eight 64-pin cable connectors. The eight 64-pin connectors of the special harness call the Hydra cables connect to the backplane as follows. Pair 3 connector 1-24 CO side Pair 2 connector 1-24 OSP side Pair 1 connector CO side Pair 4 connector OSP side Pair 5 connector CO side Pair 8 connector OSP side Pair 7 connector CO side Pair 6 connector OSP side *pins and unassigned. **pin 64 connected to cable sheath ground. Pair 5 Pair 6 Pair 7 Pair 8 The special harness Hydra cables have eight 32-pair (64 pin) connectors on one end, and eight 25-pr (50 pin) connectors + two 16-pr (shielded, non-connector pairs) on the other end. The 64-pin connectors connect to the TA3000 backplane. The 50-pin connectors connect to the MDF (Frame) blocks. The 16-pair DS1 non-connectorized cables connect to the DS1 interconnect panels.

12 Photograph of Adtran TA3000 Backplane shown below. One TA3000 connected to a C.O. communications port can use it s SCU card to serve as a host for up to 31 other TA3000 shelves configured as clients. The client shelves can be chained using the RS-485 bus and UTP wire connected to the wire wrap pins as shown above.

13 Adtran TA3000 Rural DSLAM Bay configuration (7 foot Bay) Henry Fuse panel at top ADC DDP-1 (Digital Distribution Point) panel below the Fuse panel. 1 to 3 Adtran TA3000 shelves mounted in lower part of Bay.

14 Hendry Fuse Panel - Fuse Assignment Chart (To power down a specific shelf, you will pull the A & B fuses for that shelf). There is also a fuse at the rear of each Fan unit associated with the fan.

15 The ADC DDP-1 panel provides normal through-circuit connections from the Network Element side to the Telco DSX. Each DDP-1 panel comes equipped with 5 Jack Access cards and 5 Opening cards. All DS1s will terminate on the DS1 interconnect panel on the DCS side.

16 Changing Fan Filters

17 LED states

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