Memotec CX950 User Manual

CX950 Hardware Reference Manual
4-16
3021M100-002
4.4.4 X.21 Serial I/O Card Signal Handling
The following table identifies the X.21 signals supported on the I/O port
connector. The information identifies the pin through which the signal passes on
the DB-15 port connector.
4.4.5 X.21 Serial I/O Card Power Consumption
Power consumption for the X.21 Serial I/O card is 1.5 Watts (5.15 BTU/hr).
Table 4-4 Signal Pin-Outs for X.21 Port
X.21
Signal
Circuit Function ITU-T
DB-15
Pin No.
Signal
DTE
Direction
DCE
F. GND Protective Ground 101 1 n/a n/a
TXDA Transmitted Data (Set A) 103-A 2 Out In
DTRA Data Terminal Ready (Set A) 108-A 3 Out In
RXDA Received Data (Set A) 104-A 4 In Out
DCDA Data Carrier Detect (Set A) 109-A 5 In Out
RXCA Receive Clock (Set A) 115-A 6 In Out
DTE Signal Element Timing (Set A) 7 not used not used
S. GND Signal Ground 102 8 n/a n/a
TXDB Transmitted Data (Set B) 103-B 9 Out In
DTRB Data Terminal Ready (Set B) 108-B 10 Out In
RXDB Received Data (Set B) 104-B 11 In Out
DCDB Data Carrier Detect (Set B) 109-B 12 In Out
RXCB Receiver Clock (Set B) 115-B 13 In Out
DTE Signal Element Timing (Set B) 14 not used not used
Reserved 15 not used not used

Memotec CX950 Specifications

General

Brand	Memotec
Model	CX950
Category	Network Hardware
Language	English