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CCN as a Network Service Center (RFC0090)

IP.com Disclosure Number: IPCOM000003949D
Original Publication Date: 1971-Jan-25
Included in the Prior Art Database: 2000-Sep-13
Document File: 5 page(s) / 11K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

R.T. Braden: AUTHOR

Abstract

CCN, the Campus Computing network of UCLA, will shortly be connected to the ARPA Network as a host of the "Service Center" type. The purpose of this RFC is to describe the hardware and software available at CCN and the services we are now planning to provide to other Network Hosts.

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 27% of the total text.

Network Working Group 25 January 1971

Request for Comments: 90 R. T. Braden

NIC 5707

CCN AS A NETWORK SERVICE CENTER

A. INTRODUCTION

CCN, the Campus Computing network of UCLA, will shortly be connected

to the ARPA Network as a host of the "Service Center" type. The

purpose of this RFC is to describe the hardware and software available

at CCN and the services we are now planning to provide to other

Network Hosts.

These services and their implementation priority were chosen in

consultation with a particular site (RAND) which plans to use CCN via

the Network. We would welcome requests and comments from other sites.

B. CCN HARDWARE

CCN operates an IBM 360/91KK, i.e., a Model 91 CPU with a 4 million

byte fast memory.

CPU Speed: Highly program-dependent; 2-6 Mips, with 3 Mips as a

useful average. The upper end of this range occurs

heavy floating point in the inner loops. The decimal

arithmetic operation of a 360 should be avoided as

they are executed interpretively by the 91.

Memory Speed: Memory is interleaved 16 ways and extensively

buffered. Effective memory fetch time is 600 ns in

lower 2 million bytes, 900 ns in upper 2 million

bytes.

I/O Con-

figuration a) 6 2860 Selector Channels

b) 1 2870 Multiplexor Channcl (with 16 control

unit RPQ)

c) 5 2314 Disk Storage Units (i.e., 40 disk

drives).

d) 1 2301 Drum (Systems residence and catalog

only.)

e) 5 (245x) 9 track tape drives (80O bpi)

f) 3 (240x) 7 tracts tape drives (200/556/800 bpi)

g) 1 2291 (Modified 2250 CRT) Operator/

Maintenance Console.

Also on the Multiplexor Channel are:

h) 2 card readers and 4 high speed printers at CCN;

i) Four 40,000 baud interfaces for CCI alphanumeric

TV display consoles (currently supporting 40

consoles);

j) Six data communication ports (3 dial @ 2000 baud,

1 dedicated @ 4800 baud, and 2 dedicated @ 50,000

baud) for remote batch entry terminals;

k) a Calcomp plotter;

l) an interface for BBS Teleputers (the Culler-Fried

system);

m) Ten dial ports for 2741 typewriter terminals;

and finally:

n) the IMP Interface

C. OPERATING SYSTEM

The Model 91 operates under the IBM-supp...