Chapter 4. IBM iSeries 270 models 111
#4751 #4751 PCI ISDN BRI S/T IOA
The #4751 is a four-port (eight channel) ISDN BRI (basic rate) full sized PCI card. Each port consists of 2B+D
configuration. The #4751 is the “S/T”-bus (four wire) version of the #4750 PCI ISDN BRI U IOA .
The #4751 requires a network terminating device in the circuit. In the United States and Canada, this must be provided by
the client. In other countries or regions, it is most likely provided by the telephone company.
The #4751 supports the following protocols:
PPP (communicates with remote analog modems (V.90) as well as with remote ISDN devices)
IDLC
Fax
Four 30-ft (9.3 m) RJ-45 to RJ-45 network cables are shipped with each #4751. For configuration purposes, each #4751
counts as eight lines (two lines per port) towards the system communication maximums. Supports full duplex.
The #4751 requires country or region certification or homologation.
Requires a full-sized PCI card slot.
Supported in the Model 270 and the #5075 PCI Expansion Tower
Maximum: One per IOP
Minimum operating system level: OS/400 V4R5; not supported with OS/400 V5R2
The #4751 is a Customer Install Feature.
#4761 #4761 PCI Integrated Analog Modem
The #4761 is based on the latest Digital Signal Processor (DSP) technology. The #4761 allows the modem function to be
integrated into the IOA and supports multiple analog modem ports (eight phone lines). The #4761 supports the following
protocols without the need for an external modem:
SLIP/PPP (uses V.90, so the maximum line speed is 56 Kbps)
SDLC (uses V.34, so the maximum line speed is 33.6 Kbps)
Fax (uses V.17 to achieve a 14.4 Kbps maximum line speed)
OS/400 V5R1 is the last release to support non-Fax functions on the #4761. An ASYNC line description is required for Fax
and can only be used for Fax. The ECS line is not supported. To the iSeries or AS/400e server, the #4761 appears like a
single IOA with eight individual line resources available. Eight 30-ft (8 m) phone cables are shipped with each #4761. For
configuration purposes, each #4761 counts as eight communications lines toward the system communication maximums.
Supports full duplex.
The #4761 requires country or region certification or homologation.
Requires full sized PCI card slot.
Supported in the Model 270 and the #5075 PCI Expansion Tower.
Minimum operating system level: OS/400 V4R5
The #4761 is a Customer Install Feature.
#4801 #4801 PCI Cryptographic Coprocessor
The #4801 is a hardware cryptography solution. The #4801 is a half-length PC form-factor PCI card, which offers rich
cryptography function, secure storage of cryptographic keys, and 12 Mbps performance (at the card level) for bulk data
encryption and triple DES capability. The #4801 is available worldwide. The level of cryptographic function is determined
by the Cryptographic Access Provider licensed program, which is downloaded to the adapter.
Due to temperature requirements (card temperature must not drop below 5 degrees F (-15 degrees C)), the #4801 is
shipped separately from the system in special packing.
Minimum operating system level: OS/400 V4R5
The #4801 is a Customer Install Feature.
The #4801 was withdrawn from marketing on 01 June 2006. The #4806 PCI-X Cryptographic Coprocessor is the
recommended replacement.
