TELCOLINK DT - AccessDSL NTU
User
Manual
Version: 2.5
Page 55 of 66
9.4
Nx64/RS232 DCE Connector
Pin
V.24 (V.35/V.36)
X.21
Direction
ITU-T # Description
Name
Description
Name
1
-
Shield
-
Shield
-
-
7
102
Signal Gnd
SG
Signal Gnd
G
-
2
103a Transmit Data (A)
TD(A)
Transmit (A)
Ta
TO DCE
14
103b Transmit Data (B)
TD(B)
Transmit (B)
Tb
TO DCE
3
104a Receive Data (A)
RD(A)
Receive (A)
Ra
TO DTE
16
104b Receive Data (B)
RD(B)
Receive (B)
Rb
TO DTE
4
105a Request To Send (A)
RTS(A) Control (A)
Ca
TO DCE
19
105b Request To Send (B)
RTS(B) Control (B)
Cb
TO DCE
5
106a Clear To Send (A)
CTS(A) Indication (A)
Ia
TO DTE
13
106b Clear To Send (B)
CTS(B) Indication (B)
Ib
TO DTE
6
107a Data Set Ready (A)
DSR(A)
TO DTE
22
107b Data Set Ready (B)
DSR(B)
TO DTE
20
108a Data Terminal Ready (A)
DTR(A)
TO DCE
23
108b Data Terminal Ready (B)
DTR(B)
TO DCE
8
109a Data Carrier Detect (A)
DCD(A)
TO DTE
10
109b Data Carrier Detect (B)
DCD(B)
TO DTE
24
113a Terminal Transmit Clock (A)
TTC(A) DTE Signal Element Timing (A)
Xa
TO DCE
11
113b Terminal Transmit Clock (B)
TTC(B) DTE Signal Element Timing (B)
Xb
TO DCE
15
114a Transmit Clock (A)
TC(A)
TO DTE
12
114b Transmit Clock (B)
TC(B)
TO DTE
17
115a Receive Clock (A)
RC(A)
Signal Element Timing (A)
Sa
TO DTE
9
115b Receive Clock (B)
RC(B)
Signal Element Timing (B)
Sb
TO DTE
21
140
Remote Loopback
RLB
TO DCE
18
141
Local Loopback
LLB
TO DCE
25
142
Test Mode
TM
TO DTE
Continue:
Pin
V.24 (V.28) synchronous
RS232 asynchronous
Direction
ITU-T # Description
Name
Description
Name
1
-
Shield
7
102
Signal Gnd
SG
Signal Gnd
SGND
21
103
Transmit Data
TD
Transmit Data
TXD
TO DCE
5
104
Receive Data
RD
Clear To Send
CTS
TO DTE
4
105
Request To Send
RTS
Request To Send
RTS
TO DCE
6
107
Data Set Ready
DSR
Data Set Ready
DSR
TO DTE
20
108
Data Terminal Ready
DTR
Data Terminal Ready
DTR
TO DCE
18
113
Terminal Transmit Clock
TTC
TO DCE
25
114
Transmit Clock
TC
Receive Data
RXD
TO DTE
8
115
Receive Clock
RC
Data Carrier Detect
DCD
TO DTE
