
5 SERIAL I/O CARDS
3006M100-002
5-13
Separate A and B signals in the V.35 interface indicate differential pair signals.
5.3.5
V.35H Serial I/O Card Power Consumption
Power consumption for the V.35H Serial I/O Card is 1.5 Watts (5.15 BTU/hr).
5.4
X.21 Serial I/O Card
The X.21 I/O Card and its single port supports synchronous transmission at
speeds up to 2,048 Kbps.
5.4.1
X.21 Serial I/O Card Components
Important components on the X.21 Serial I/O Card include:
•
edge connector
•
port connector
•
signal LEDs
•
port configuration jumper
*Unassigned
19
not used
not used
DTR
Data Terminal Ready
108
20
Out
In
*Unassigned
21
not used
not used
RI
Ring Indicator
125
22
In
Out
*Unassigned
23
not used
not used
ETXCA
External Transmitter Clock (Set A
113-A
24
Out
In
*Unassigned
25
not used
not used
Table 5-3 Signal Pin-Outs for V.35H Port
V.35H
Signal
Circuit Function
ITU-T
DB-25
Pin No.
Signal
DTE
Direction
DCE
Summary of Contents for CX900e
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