Cisco 2511 - I have only one octal cable, so you will need another one if you are going to use more 8 tty lines.

r9#show version
Cisco Internetwork Operating System Software
IOS (tm) 2500 Software (C2500-JS-L), Version 11.2(22), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2000 by cisco Systems, Inc.
Compiled Mon 03-Apr-00 21:13 by htseng
Image text-base: 0x03040380, data-base: 0x00001000

ROM: System Bootstrap, Version 5.2(8a), RELEASE SOFTWARE
BOOTFLASH: 3000 Bootstrap Software (IGS-RXBOOT), Version 10.2(8a), RELEASE SOFTWARE (fc1)

r9 uptime is 9 hours, 46 minutes
System restarted by power-on
System image file is "flash:c2500-js-l_112-22.bin", booted via flash

cisco 2511 (68030) processor (revision L) with 14336K/2048K bytes of memory.
Processor board ID 05520340, with hardware revision 00000000
Bridging software.
SuperLAT software copyright 1990 by Meridian Technology Corp).
X.25 software, Version 2.0, NET2, BFE and GOSIP compliant.
TN3270 Emulation software.
1 Ethernet/IEEE 802.3 interface(s)
2 Serial network interface(s)
16 terminal line(s)
32K bytes of non-volatile configuration memory.
8192K bytes of processor board System flash (Read ONLY)

Configuration register is 0x2102

r9#show flash all

System flash directory:
File Length    Name/status
          addr            fcksum    ccksum
1    8128764 c2500-js-l_112-22.bin
          0x40          0xB17D   0xB17D
[8128828 bytes used, 259780 available, 8388608 total]
8192K bytes of processor board System flash (Read ONLY)

Chip Bank Code Size        Name
1      1       01D5 1024KB AMD 29F080
2      1       01D5 1024KB AMD 29F080
3      1       01D5 1024KB AMD 29F080
4      1       01D5 1024KB AMD 29F080
1      2       01D5 1024KB AMD 29F080
2      2       01D5 1024KB AMD 29F080
3      2       01D5 1024KB AMD 29F080
4      2       01D5 1024KB AMD 29F080
Executing current image from System flash