ASP Cabling Specifications

This appendix lists the pinouts for ports on the ATM Switch Processor (ASP) and for serial interface cables that connect console and auxiliary ports to the external network.

All pins not specifically listed are not connected.

See the appendix "PAM Cabling Specifications" of the LightStream 1010 ATM Switch PAM Installation Guide for port adapter module (PAM) cable pinouts.

Following is a list of the signal summaries contained in this appendix:

Ethernet Connection Equipment

The Ethernet port on the ASP is an RJ-45 receptacle. Table B-1 lists the signals for the Ethernet RJ-45 connector.

Pin	Signal	Direction	Description
1	TxD+	--->	Transmit data +
2	TxD-	--->	Transmit data -
3	RxD+	<---	Receive data +
4	NC	---	No connection
5	NC	---	No connection
6	RxD-	<---	Receive data -
7	NC	---	No connection
8	NC	---	No connection

Table B-1: Ethernet RJ-45 Connector Pinouts

Pin Signal Direction Description

1

TxD+

--->

Transmit data +

2

TxD-

--->

Transmit data -

3

RxD+

<---

Receive data +

4

NC

---

No connection

5

NC

---

No connection

6

RxD-

<---

Receive data -

7

NC

---

No connection

8

NC

---

No connection

Console Port Signals

The console port on the ASP is an EIA/TIA-232, DCE, DB-25 receptacle. Both DSR and DCD are active when the system is running. The RTS signal tracks the state of the CTS input. The console port does not support modem control or hardware flow control. The console port requires a straight-through EIA/TIA-232 cable. Table B-2 lists the signals used on this port.

Pin	Signal	Direction	Description
1	GND	---	Ground
2	TxD	<---	Transmit data
3	RxD	--->	Receive data
4	RTS	--->	Ready to send¹
5	CTS	--->	Clear to send¹
6	DSR	--->	Data set ready (always on)²
7	GND	---	Ground
8	DCD	--->	Data carrier detect (always on)²
20	DTR	<---	Data terminal ready
Shield	GND	---	Shield ground

Table B-2: Console Port Signals

Pin Signal Direction Description

1

GND

---

Ground

2

TxD

<---

Transmit data

3

RxD

--->

Receive data

4

RTS

--->

Ready to send¹

5

CTS

--->

Clear to send¹

6

DSR

--->

Data set ready (always on)²

7

GND

---

Ground

8

DCD

--->

Data carrier detect (always on)²

20

DTR

<---

Data terminal ready

Shield

GND

---

Shield ground

¹Pins 4 and 5 are connected together and are not driven by the ASP.
²Pins 6 and 8 are connected together and are driven by the ASP.

Auxiliary Port Signals

The auxiliary port on the ASP is an EIA/TIA-232 DTE, DB-25 plug to which you can attach a CSU/DSU, or other equipment, in order to access the router from the network. Table B-3 lists the EIA/TIA-232 signals used on this port.

The asynchronous auxiliary port supports hardware flow control and modem control.

Pin	Signal	Direction	Description
1	GND	---	Shield ground
2	TxD	--->	Transmit data
3	RxD	<---	Receive data
4	RTS	--->	Request to send (used for hardware flow control)
5	CTS	<---	Clear to send (used for hardware flow control)
6	DSR	<---	Data set ready
7	Signal ground	---	Signal ground
8	CD	<---	Carrier detect (used for modem control)
20	DTR	--->	Data terminal ready (used for modem control only)
22	RI	<---	Ring indicator

Table B-3: ASP Auxiliary Port Signals

Pin Signal Direction Description

1

GND

---

Shield ground

2

TxD

--->

Transmit data

3

RxD

<---

Receive data

4

RTS

--->

Request to send (used for hardware flow control)

5

CTS

<---

Clear to send (used for hardware flow control)

6

DSR

<---

Data set ready

7

Signal ground

---

Signal ground

8

CD

<---

Carrier detect (used for modem control)

20

DTR

--->

Data terminal ready (used for modem control only)

22

RI

<---

Ring indicator

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