Specifications

RFC-1 Advanced Operation page 6.54
6.10.2 Hardware Version
Incorrect hardware version settings can cause undesirable system behavior. If incorrect data is
programmed, the RFC-1 seizes the telephone line making it impossible to call the system. Do not
change this setting unless you are certain that it is required for your installation.
The hardware revision is set at the factory and does not normally require adjustment. If the firmware is upgraded in
the field then it may be necessary to adjust this setting.
RFC-1 hardware revisions 1.05 and earlier use a telephone line interface module labeled “XECOM”. A firmware
adjustment is required to support this device when firmware is upgraded. Dial-up connections will not operate until
this adjustment is made from the local phone. Most systems do not require this adjustment.
Program the value from column V1 in the table below at memory address 0996 to adjust the hardware version.
V1
PCB Revisions
Description
0
1.00-1.05
“XECOM” DAA module for telephone line interface
1
1.06-1.99 & 2-9
Discrete parts for telephone line interface
2
10-15
ISD2590P speech processor (imprecise tone dial)
3
16
HT9200 tone generator added
The hardware version can only be determined by looking at the system board. If the hardware version cannot be
determined from the descriptions above, V1=1 is usually a safe setting.
6.10.3 Inactive System Timeout
As a precaution, the RFC-1 will disconnect after a predetermined period of inactivity—no commands received through
either tones or serial data. Find the maximum period of inactivity allowed in the table below. Program the value from
column V1 at memory address 1000 to adjust the time-period for the inactive system timeout.
V1
Idle system time-out
V1
Idle system time-out
0
30 seconds
8
32.5 minutes
1
60 seconds
9
41 minutes
2 *
2.5 minutes
10
50.0 minutes
3
5 minutes
11
61 minutes
4
8.5 minutes
12
72.5 minutes
5
13 minutes
13
85 minutes
6
18.5 minutes
14
98.5 minutes
7
25 minutes
15
113 minutes
* This is the default setting.