GDK-100
DIGITAL KEY TELEPHONE SYSTEM
14
Table 2.3.5
CO Loop Specifications
Ring Detect Sensitivity
16-30 Hz, 40 Vrms
30-60 Hz, 30 Vrms
DTMF Dialing
Frequency Deviation
Signal Rise time
Tone Duration, on-time
Interdigit time
less than
±
1%
3 msec, maximum
75 mesc, minimum
75 mesc, minimum
Pulse Dialing
Pulse Rate
Break/Make Ratio
10 pps or 20 pps
60/40% or 67/33%
!
Note: Ring Detection sensitivity and Pulse Ratio may differ from above in some countries,
because of the relevant special national specification.
Table 2.3.6
Miscellaneous Specifications
Main System Memory
Memory size
Read-Only-Memory, EPROM
Random Access Memory, RAM
basic = 2 Megabytes
basic = 512 Kbytes
expansion = 512 Kbytes (MEMU / SMEMU)
Account Codes
Number
Number of codes
Digits per code
no limit
12
Authorization of codes
Number
Number of codes
Digits per code
164
5