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SmartNode 4900 Series Getting Started Guide
Sync Serial port
Two types of serial ports are available: V.35 or X.21. They are configured as DTE. The V.35 is presented on a
DB-25 female connector (see
table 15
for pin-outs).
Sync Serial port
VoIPon
www.voipon.co.uk
table 14
for pin-outs). The X.21 is presented on a DB-15 female connector (see
Note
Pins not listed are not used
Table 14. V.35 serial port signals (DB-25 connector)
Pin
1
2
3
4
5
6
7
8
9
11
12
14
15
16
17
20
24
Table 15. X.21 serial port signals (DB-15 connector)
Pin
1
8
2
3
4
5
6
9
10.
11
12
13
sales@voipon.co.uk
Description
Frame Ground
TD-a (to DCE)
RD-a (from DCE)
RTS (to DCE)
CTS (from DCE)
DSR (from DCE)
Signal Ground
CD (from DCE)
RC-b (from DCE)
XTC-b (to DCE)
TC-b (from DCE)
TD-b (to DCE)
TC-a (from DCE)
RD-b (from DCE_
RC-a (from DCE)
DTR (to DCE)
XTC-a (to DCE)
Description
Signal Ground
DTE Common Return
Transmit (to DCE)
Control (to DCE)
Receive (from DCE)
Indication (from DCE)
Signal Element Timing (from DCE)
Transmit (to DCE)
Control (to DCE)
Receive (from DCE)
Indication (from DCE)
Signal Element Timing (from DCE)
Tel: +44 (0)1245 808195
C • Port pin-outs
62
Fax: +44 (0)1245 600030
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