Telephone Line Emulator User’s Manual
40-400-00020, Rev. M 102
Timers
Ring end to FSK 550 mS
DTMF/FSK end to ring start 200 mS
OSI timer length 0.200 S
On-hook channel Seizure 250 mS
On-hook Mark length 150 mS
Off-hook Mark length 67 mS
Ring burst 200 mS
Ring Cadence Group 1 2.0 sec on/4.0 sec off
Ring Cadence Group 2 .8 sec on/.4 sec off/.8 sec on/ 4 sec off
Ring Cadence Group 3 1 sec on/1 sec off/1 sec on/ 3 sec off
References
ITU Fascicle II.2 Recommendation E.180, Supplement #2, 1/94
Telephone Network and ISDN - Operation, Numbering, Routing, and Mobile
Services; Various Tones Used in National Networks
Technical Standard 002, Dec 1997, Australian Communications Authority
Analogue Interworking and Non-interference Requirements for Customer
Equipment Connected to the Public Switched Telephone Network Technical
Standard 30, 1997, Australian Telecommunications Authority, Requirements for
Customer Equipment with an Analogue Data Interface Connected to the Public
Switched Telephone Network
British Standard BS 6305: 1992
General requirements for apparatus for connection to the public switched
telephone network run by certain public telecommunications operators SIN 227,
Nov. 1997, British Telecom document: CDS, Calling Line Identification Service,
Service Description SIN 242 Issue 2, Nov. 1996, British Telecom document,
CDS, Calling Line Identification Service, Terminal Equipment Requirements
ETSI 300-001, March 1992, ETSI, European Telecommunications Standard
Attachments to the Public Switched Telephone Network; General technical
requirements for equipment connected to an analogue interface in the PSTN
ETS 300 659-1, Feb. 1997, ETSI document: Public Switched Telephone Network
(PSTN); Subscriber Line Protocol over the local loop for display (and related)
services; Part 1: On-hook data transmission ETS 300 659-2, Sept. 1997, ETSI
document: Public Switched Telephone Network (PSTN); Subscriber Line
Protocol over the local loop for display (and related) services; Part 2: Off-hook
data transmission
ETS 300 778-1, Sept. 1997, ETSI document
Public Switched Telephone Network (PSTN); Protocol over the local loop for
display and related services; Terminal Equipment Requirements, Part 1: Off-line
data transmission
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