IBM AS/400e, Руководство пользователя

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PCI Card Placement Rules
292
AS/400e System Handbook
• Electrical interfaces X.21, V.35, or EIA-449/V.36 must be used
• 20-foot (6-meter) cables must be used for the X.21 and V.35 interfaces
• “Looped” clocking is required on EIA/449/V.36 cables longer than 20-feet (6-meters)
• “Looped” or “inverted” clocking may be required for line speeds faster than 512 Kbps
Note: The following protocols have limits as noted, and are always considered low speed
lines:
• Bisync limited to maximum of 64 Kbps
• Async limited to maximum of 115.2 Kbps
• Async/PPP limited to maximum of 230.4 Kbps. When used at speeds above 115.2
Kbps, a high-speed cable must be used.
2. When using X.25 protocol, a maximum of 64 Virtual Circuits are allowed per IOA unless
the “Configuration Validation Procedure” on page 283 indicates that enough memory and
performance capacity is available on the IOP to support a higher number of Virtual
Circuits.
3. Frame Relay and X.25 are not allowed on the same IOA unless the “Configuration
Validation Procedure” on page 283 indicates that enough memory and performance
capacity is available on the IOP to support both protocols on the IOP.
4. Frame Relay protocol has the following restrictions.
• EIA-232/V.24 connection is not supported
• The line speed must be 56 Kbps or greater
• One line of Frame Relay is allowed per IOA. If there is a requirement for Frame Relay
on both ports, the “Configuration Validation Procedure” on page 283 can be used to
determine if enough memory and performance capacity is available on the IOP to
support more lines.
5. A maximum of 1400 routes and 1400 services are allowed per line.
6. The “emulated LAN” support for ATM adapters has the following restrictions:
• A maximum of two “emulated LANs” are supported per IOA.
• When running two “emulated LANs”, the LANs must be of a different type such as one
Token-Ring and one Ethernet.
7. In general, to provide best performance, we recommend that these IOAs have a dedicated
IOP.
8. The #9771 V.90 port supports only Async-PPP protocol.
9. Workstations attached to the #4746 are limited to a maximum of 40 unique device
addresses per IOA. In addition, the number of active workstation sessions is limited to 120
per IOA.
10. IPX is not supported on the ATM IOAs (#4815, #4816, and #4818) or #2743 PCI 1 Gbps
Ethernet IOA.