Data General Service ECLIPSE MV/7800 - Page 13

On-site selection of the password and/or telephone access list options enable a specific security routine each time
the modem automatically answers an incoming call. Incoming password and/or telephone number(s) are verified
against the data stored in the COMSWITCH-II memory. The COMSWITCH-II commands the modem to
disconnect after receipt of a valid password and phone number. Correct password/telephone number generates a
command to the modem to dial back the remote requestor, using the exact dialstring that is matched by the
telephone number that was entered as part of the requestor security input. When the number is dialed and
communications is established, the COMSWITCH-II generates a message displayed- on the system console
indicating the start of a remote session, the requestor telephone number, and the time and date information.
If the entered password and/or telephone number do not agree with the data stored in the COMSWITCH-H
memory, the modem receives a disconnect command from the
comswrroi-II.
The COMSWITCH-H also
displays an error message with time and date information on the system console. Security penetration is only
possible if the on-site user permits it.
Maximum security is afforded to the on-site user who chooses to use both the password and telephone dialback
option. The incoming call security routine is always generated.
1.2 MODELS
The ECLIPSE MV/7800 and MV/7800-C computer systems are available in two different memory size models
(Table 1-1) running under one of four different operating systems. The 15 x 15-inch CPU PCB plugs into slot 1
but occupies slots 1 and 2 of a CPU 16-slot chassis. Model prefixes denote cabinet color with suffixes indicating
on board CPU memory size and operating system. The ECLIPSE MV/7800 model 8883 is mounted in a 16-slot
chassis that is housed in a single-bay meter-high cabinet (Models 1605/1606). The ECLIPSE MV/7800-C,
models 8884 and 8885 are housed in a 16-slot chassis that can be rack mounted (Figure 1-1).
The 15 x 15 CPU PCB system is upgradeable into a NOVA 4/X, 4/S, 4/C, S/120, 5- and 16-slot chassis and a
S/140 16-slot chassis. Table 1-2 defines these upgraded model numbers. The expansion add-on memory model
upgrades are given in Table 1-3.
Table 1-1. ECLIPSE MV/7800, Model 8883 and ECLIPSE MV17800-C, Models 8884 and 8885
ECLIPSE
COMPUTER
MODEL NUMBER
MEMORY
SIZE
OPERATING
SYSTEM
MV17800
(B, E) 8883-A 4 MBtye
AOS/VS RTU
MV/7800
(B, E) 8883-B
4 MByte AOS/DVS RTU
MV/7800
(B, E) 8883-C 4 MByte DG/UX RTU
MV/7800-C
(B, E) 8884-A 2 MByte AOS/VS RTU
MV/7800-C (B, E) 8884-B
2 MByte AOS/DVS RTU
MV/7800-C
(B, E) 8884-C
2 MByte DG/UX RTU
MV/7800-C
(B, E) 8885-A
4 MByte
AOS/VS RTU
MV/7800-C (B, E) 8885-8
4 MByte
AOS/DVS RTU
MV/7800-C
(B, E) 8885-C
4 MByte
DG/UX RTU
Prefix (B, E) denotes color (blue or earthtone).
Suffix (A-C) denotes Operating System.
A = AOS/VS, B = AOS/DVS, C = DG/UX,
RTU = Right to Use
DGC CONFIDENTIAL - INTERNAL USE ONLY

1-3

043-003621