Cisco MXP Series, The Physical Interface Manual

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Net Interface Socket
Net interface socket. 1 × X.21 / V.35 / RS449
with 1 × RS366 Call Control up to 2 Mbps
HD D-SUB 26 pin-out
External view of socket
9
1
10
19
18
26
V.35 DTE - DCE
Pin Signal
Name
Description
1 FGND Frame GND on
equipment
11 SD(A) Send Data / Transmit
12 SD(B) Send Data / Transmit
13 RD(A) Receive Data
14 RD(B) Receive Data
15 SCR(A) Signal Clock Receive
16 SCR(B) Signal Clock Receive
17 SCT(A) Signal Clock Transmit
18 SCT(B) Signal Clock Transmit
19 GND
1
Signal GND
22 RLSD(CD) Received Line Signal
Detector / Carrier
Detect
23
RLSD(GND) 1
Signal GND
24 RI Ring Indicator
25 LOS Loss of Signal (KG194)
26 DTR Data Terminal Ready
1) This pin is connected to ground for correct
operations
RS449 DTE - DCE
Pin Signal
Name
Description
1 FGND Frame GND
11 SD(A) Send Data
12 SD(B) Send Data
13 RD(A) Receive Data
14 RD(B) Receive Data
15 RT(A) Receive Timing
16 RT(B) Send Timing
17 ST(A) Send Timing
18 ST(B) Send Timing
19 GND
1
GND
20 TR(A) Terminal Ready
21 TR(B) Terminal Ready
22 RR(A) Carrier Detect / Receiver
Ready
23 RR(B) Carrier Detect / Receiver
Ready
24 IC Incoming Call
25 LOS Loss of Signal (KG194)
Frame GND is connected to pin 1 on DTE
1) This pin is connected to ground for correct operations
Note the following:
V.10 (RS423). For balanced signals
a “0” = low voltage, is defined as
terminal A positive with respect to
terminal B. For unbalanced signals
a “0” = low voltage, is defined as
terminal positive with respect to
GND. Cable length for Leased Line
Control should not exceed 20 m.
RS 366. All balanced inputs and
outputs (A and B) use balanced line
signals according to V.11 (RS 422),
while single ended signals are in
accordance with V.10 (RS423). The
“0” = low voltage definitions are the
same as for V.10 above. Max cable
length, as for V.10 above.
RS366 DTE - DCE
Pin Signal
Name
Description
1 FGND Frame GND
2 DPR Digit Present
3 ACR Abandon Call & Retry
4 CRQ Call Request
5 PND Present Next Digit
6 DLO Data Line Occupied
7 NB1 Digit Bit 1
8 NB2 Digit Bit 2
9 NB4 Digit Bit 4
10 NB8 Digit Bit 8
X.21 DTE - DCE
Pin Signal
Name
Description
1 FGND Frame GND
11 T(A) Send Data / Transmit
12 T(B) Send Data / Transmit
13 R(A) Received Data /
Receive
14 R(B) Received Data /
Receive
15 S(A) Signal Element Timing
16 S(B) Signal Element Timing
20 C(A) Terminal Ready /
Control
21 C(B) Terminal Ready /
Control
22 I(A) Carrier Detect
23 I(B) Carrier Detect
12
MXP Series Codecs Physical interface guide
D14790.01 MXP Series Codec Physical Interface Guide, May 2011.
© 2011 Cisco Systems, Inc. All rights reserved.
www.cisco.com
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