Aethra D2000 Lite, User Manual, Page: 43 / 186

USER’S MANUAL ISDN TESTER AND ANALYZER D2000
PRO
/D2000Lite/D2000
Frame Relay setting : Opens the setting page regarding Frame Relay protocol. See
§ 3.3.5.
3.3.4.1. V.24 interface
This type of interface is used in presence of unbalanced transmissions both
synchronous and asynchronous.
V.24 : Select the communication mode of V.24 interface.
•
Synchronous , for synchronous transmission of data.
•
Asynchronous , for data transmission where clock is obtained directly from
data both, in transmission and reception.
In case of synchronous transmission, the parameters to be set
are the same reported in § 3.3.4 for V.35 interface.
Start-stop bits : Set the number of control bits to be inserted, 1 or 2, as START and
STOP bits for data packets transmitted or received.
Pattern : Set the number of bits composing each single character (pattern).
Baud rate : Set the communication baud rate between DTE and DCE.
Parity : The Parity bit may be added at the end of each data pattern, for a further
control over the quality of transmitted and received data.
•
None , no Parity bit is added.
•
Odd , a control over set bits = 1 of data pattern is performed and, if the
calculation of set bits =1 turns out to be even, a further set bit = 1 is added at
the end of the pattern. On the contrary, if the number turns out to be odd a
set bit = 0 is added at the end of the pattern.
•
Even , a control over set bits = 1 of data pattern is performed and, if the
calculation of set bits =1 turns out to be odd, a further set bit = 1 is added at
CHAPTER 3 - PERFORMING A MANUAL TEST
43