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4.8 ATM WAN Module
The ATM WAN Module is a single-slot WAN concentrator module that has the
following characteristics:
•
Provides wide-area access to campus ATM networks at speeds ranging from
E3 (34.368 Mbps) to OC3/STM-1 (155.520 Mbps), when the bandwidth
management capabilities of an external ATM WAN switch are not desired.
•
Supports switch-to-switch and switch-to-server connections at speeds up to
OC3/STM-1.
•
Interfaces directly to the circuit installed by your service provider.
•
Supports both UNI and NNI.
•
Supports reserved bandwidth (RB) service (QOS class 1 under UNI 3.0).
•
Is hot-pluggable in any available slot in the 8285 Expansion Chassis.
•
Supports both internal and external clocking.
•
Up to 3 ATM WAN Modules can be supported in the 8285 Expansion Chassis,
providing up to 6 ATM WAN ports.
•
Features four standard interfaces:
− Two backplane interfaces:
- An ATM backplane interface, which enables both data and control
flows to the switch-on-a-chip and the 8285 ATM Control Point,
respectively.
- A standard tri-channel interface, which provides power and other
control signals.
− Two I/O interfaces, which enable the attachment of any combination of
the following I/O cards:
- 1-port E3 I/O card (E3: 34.368 Mbps) BNC interface
- 1-port DS3 I/O card (DS-3/T3: 44.736 Mbps) BNC interface
- 1-port OC3 I/O card (SMF) (OC3: 155.520 Mbps) SC interface
- 1-port OC3 I/O card (MMF) (OC3: 155.520 Mbps) SC interface
- 1-port STM1 I/O card (SMF) (STM-1: 155.520 Mbps) SC interface
- 1-port STM1 I/O card (MMF) (STM-1: 155.520 Mbps) SC interface
For each of these cards, the receive port is the left one, and the transmit
port is the right one.
4.8.1 A02 WAN ATM Physical Interface Supported
The following table lists the ATM physical interfaces with WAN module interfaces
supported:
Table 6 (Page 1 of 2). ATM Physical Interface Support
Layer Rate (Mbps) Cable Coding A02 WAN
Support
OC-48 2488 SMF STS-48 No
OC-24 1244 SMF STS-24 No
OC-12 622.08 SMF STS-12c No
Chapter 4. IBM 8285 ATM Modules 67