AT&T MERLIN LEGEND Release 2.0 Equipment And Operations Manual page 191

Applications
Table 4-6. Voice Channels Required
No. of Channels
Required
2
4
6
8
12
Differences
Mode
Only the CAS—IS II and the SPM—IS II applications can be connected to a
system that operates in the Behind Switch mode.
Considerations and Constraints
IS II uses UNIX System V Release 3.2.2.
IS II stores up to 12 hours of voice-mail messages when IS II includes
AVP and over 200,000 call accounting records when IS II includes CAS.
Either IVP AA or AVP can be installed on the system, but not both.
The system supports up to 12 IVP AA ports (on three circuit boards).
If IS II includes AVP, when users receive voice-mail messages, the
message LEDs on their telephones turn on, provided that a mailbox has
been assigned to each of those telephones.
For AVP or IVP AA, the following symptoms indicate that the system
needs more TTRs:
— Single-line telephone users do not get dial tone when trying to
— AVP or IVP AA fails to transfer calls.
— Calls fail to ring, or calls go to coverage prematurely.
SPM—IS II reports can be printed out or written to a disk (floppy or fixed
drive). At the same time, the report is displayed on the screen together
with prompts for browsing.
SPM—IS II reports should not be printed while the system is handling
more than 100 calls per hour.
Lines
Subscribers
1 to 6 1 to 20
21 to 60
7 to 18
19 to 24
61 to 80
25 to 42 81 to 200
Over 42
201 to 300
dial out.
Busy-Hour Calls
1 to 20
21 to 60
61 to 80
81 to 200
201 to 300
Integrated Solution II (IS II) 4-35