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Cables and Connectors

User interface specifications
Ethernet interface specifications
T1/PRI interface specifications
E1/PRI interface specifications
ISDN BRI interface specifications
Serial host interface specifications
Serial WAN cabling specifications
IDSL specifications

The MAX supports a variety of interfaces. Each interface has its own specifications and cabling requirements

User interface specifications

The interface for the control-monitor, palmtop-controller, and MIF each has its own cabling pinout specifications. The MAX supports control-monitor, palmtop-controller, and MIF interfaces.

Control port and cabling pinouts for the control-monitor and MIF

The control-port uses a standard DE-9 female connector that conforms to the EIA RS-232 standard for serial interfaces. Table C-1 applies to all MAX models that use the RS-232 pinouts.

Table C-1. Control-monitor and MIF control-port and cabling pinouts

DE-9 pin number

RS-232 signal name

Function

I/O
1

 DCD

 Data Carrier Detect

 O

2

 RD

 Serial Receive Data

 O

3

 SD

 Serial Transmit Data

 I

4

 DTR

 Data Terminal Ready

 I

5

 GND

 Signal Ground

6

 DSR

 Data Set Ready

 O

7

 RTS

 Request to Send

 I

8

 CTS

 Clear to Send

 O

*9

 *RI

 *Ring Indicator

 *O

Pin 9 is not active. (Ring Indication signal not supplied.)

Pinouts for the palmtop-controller

Table C-2 specifies the pins and corresponding functions of the palmtop-controller jacks.

Table C-2. Palmtop-controller pinouts

MAX RJ-12 pin

Function

I/O
1

 Power to Palmtop, +5V

 O

2

 Control Out

 O

3

 Control In

 I

4

 Serial Transmit Data

 O

5

 Serial Receive Data

 I

6

 Ground

In the I/O column, O (Out) is from the MAX toward the palmtop.

Palmtop port and cabling pinouts for a control-monitor

Figure C-1 illustrates the MIF palmtop port and cabling pinouts for a control-monitor.

Figure C-1. Control-monitor and MIF palmtop port and cable

Table C-3 lists the specifications you need to adapt the palmtop port for use as a control-monitor or MIF interface through a VT100 terminal.

Table C-3. Control-monitor and MIF palmtop port and cabling pinouts

Model number HHT-VT100
Part number 2510-0088-001

Signal (MAX)

MAX RJ-12 pin number

VT100 female DE-9 pin number
Power (+5V)

 1

 not connected

Control Out

 2

 1

Control In

 3

 4

Serial Transmit Data

 4

 2

Serial Receive Data

 5

 3

Ground

 6

 5

Ethernet interface specifications

The base unit of a MAX has an Ethernet interface that supports the physical specifications of IEEE 802.3 and IEEE 802.14 with Ethernet 2 (Ethernet/DIX) framing. The unit provides a single Ethernet interface that auto-senses the Ethernet type to which it is connected. It supports the following types of Ethernet interfaces:

The Ethernet address used to identify the Ethernet interface resides in the MAX unit's motherboard.

To install the Ethernet interface, you must have the cables described in either of the following two sections.

10Base-T cables

To install a 10Base-T interface, you need a twisted-pair Ethernet cable and a dual twisted-pair cable terminated with RJ-45 modular jacks.

Use an EIA/TIA 568 or IEEE 802.3 10Base-T cable.

100Base-T cables

To install a 100Base-T interface, you need a twisted-pair Ethernet cable and a dual twisted-pair cable terminated with RJ-45 modular jacks.

Use one of the following cables: 100BASE-T2, 100BASE-T4 (not very popular), 100BASE-TX, or 100BASE-FX.

T1/PRI interface specifications

Specifications for the MAX unit's T1/PRI interface include Channel Service Unit (CSU) requirements, specifications for the cables and plugs available for the unit's WAN interfaces, the pins to be used on the WAN ports, and the WAN switched services that are available to the MAX.

T1/PRI CSU requirements

CSU requirements depend on whether or not you enable the internal CSU on each T1/PRI port on the MAX. To enable the internal CSU, set the Net/T1 > Line Config > slot Line N > Front End parameter to CSU. To disable the internal CSU set Front End to DSX.

Port with internal CSU

If you enable the internal CSU on a T1/PRI port, you can connect the port directly to the metallic interface of the WAN. To avoid harming the WAN, you must contact your carrier for approval before installation. Once you install the MAX, you must notify the carrier before disconnecting the MAX from the WAN. If you disconnect or turn off the MAX without prior notification, the carrier might temporarily discontinue your T1/PRI service. The MAX unit's internal CSUs are compatible with dry-loop T1/PRI lines, and with span-powered or wet-loop powered T1/PRI lines.

Port without internal CSU

If you disable the internal CSU on a T1/PRI port, you cannot connect directly to the WAN. You must connect the port to other equipment that provides the interface to the WAN (for example, an external CSU). Your carrier determines the correct value for the line buildout setting of the CSU. You configure this parameter during installation. (For detailed information about each parameter, see the Reference Guide for the MAX.)

Table C-4 lists CSU specifications

Table C-4. CSU specifications

Information

Value
CSU Registration

 2CZUSA-74421-DE-N

Critical Circuitry Power Source

 Dry Loop from local ac power source

Line Capture Frequency

 1.544 Mbps +/- 200 bps

Line Code

 AMI or B8ZS

Line Framing

 D4 or ESF

Line Input/Output Impedance

 100 Ohms +/- 5%

Received Signal Level Range

 DSX-1 level to -27.5 dB

Transmitted Signal Level

 DSX-1 level into 100 ohms

Line Buildout

 0.0, 7.5, 15.0, or 22.5 dB

Pulse Density and Consecutive Zeros Enforcement

 In accordance with requirements of AT&T Pub 62411

Line Loopback (LLB) Set Inband Code

 (10000) repeating binary pattern

Line Loopback (LLB) Reset Inband Code

 (100) repeating binary pattern

.

Note: During loss of power or whenever the MAX restarts, a relay closure returns the T1/PRI signal to the WAN. That is, the T1/PRI line is looped back. However, if you configure the MAX for framing-compatible drop-and-insert functionality, all channels of line #1 are passed to line #2. Note that line #1 and line #2 of a MAX expansion module always loop back upon loss of power, regardless of how they are configured.

T1/PRI cable specifications

The maximum cable distance between the T1/PRI WAN interface equipment and the MAX should not exceed 655 feet (200 m) for a MAX without CSUs. Measure the line length and record it when you install the MAX. You must specify this length when you configure the Line N profile parameters. (For detailed information about parameters, see the Reference Guide for the MAX.)

Use only cables specifically constructed for transmission of T1/PRI signals. The cables should meet standard T1 attenuation and transmission requirements. The following specifications are recommended:

The WAN interface cables and plugs described in the following sections are available for the MAX unit's WAN interfaces.

T1/PRI crossover cable: RJ-48C/RJ-48C

Install the RJ-48C/RJ-48C crossover cable when the WAN interface transmits on pins 5 and 4 and receives on pins 2 and 1. Figure C-2 and Table C-5 show the pinouts.

Figure C-2. RJ-48C/RJ-48C crossover cable

Table C-5. RJ-48C/RJ-48C crossover cable specifications

Model number RJ-48C-X

Part number 2510-0059/0323-001

Pair #

Signal (MAX)

Male RJ-48C (MAX)

Male RJ-48C (remote)
1

 Receive

 2

1

 5

4

2

 Transmit

 5

4

 2

1

T1/PRI straight-through cable: RJ-48C/RJ-48C

Before installing the RJ-48C/RJ-48C straight-through cable, verify that the WAN interface transmits on pins 2 and 1 and receives on pins 5 and 4. Figure C-3 and Table C-6 show the pinouts.

Figure C-3. RJ-48C/RJ-48C straight-through cable specifications

Table C-6. RJ-48C/RJ-48C straight-through cable specifications

Model number RJ-48C-S

Part number 2510-0064-001

Pair #

Signal (MAX)

Male RJ-48C (MAX)

Male RJ-48C (remote)
1

 Receive

 1

2

 1

2

2

 Transmit

 5

4

 5

4

T1/PRI straight-through cable: RJ-48C/DA-15

Before installing the RJ-48C/DA-15 straight-through cable, verify that the WAN interface transmits on pins 3 and 11 and receives on pins 1 and 9. Figure C-4 and Table C-7 show the pinouts.

Figure C-4. RJ-48C/DA-15 straight-through cable

Table C-7. RJ-48C/DA-15 straight-through cable specifications

Model number DA15-X

Part number 2510-0082-001

Pair #

Signal (MAX)

Male RJ-48C (MAX)

Male DA-15P (remote)
1

 Receive

 1

2

 3

11

2

 Transmit

 5

4

 1

9

T1/PRI crossover cable: RJ-48C/DA

Before installing the RJ-48C/DA crossover cable, verify that the WAN interface transmits on pins 1 and 9 and receives on pins 3 and 11. Figure C-5 and Table C-8 show the pinouts.

Figure C-5. RJ-48C/DA crossover cable

Table C-8. RJ-48C/DA crossover cable specifications

Model number DA15-S

Part number 2510-0065-001

Pair #

Signal (MAX)

Male RJ-48C (MAX)

Male DA-15P (remote)
1

 Receive

 1

2

 1

9

2

 Transmit

 5

4

 3

11

T1/PRI straight-through cable: RJ-48C/Bantam

The WAN side of the RJ-48C/Bantam straight-through cable connects to dual bantam jacks. Figure C-6 and Table C-9 show the pinouts.

Figure C-6. RJ-48C/Bantam straight-through cable

Table C-9. RJ-48C/Bantam straight-through cable specifications

Model number DBNT-RJ45

Part number 2510-0066-001

Pair #

Signal (MAX)

Male RJ-48 (MAX)

Male Dual-310- P (remote)
1

 Receive

 1

2

 Tip 1

Ring 1

2

 Transmit

 5

4

 Tip 2

Ring 2

T1 RJ-48C-Loopback plug

This plug loops the transmit signal back to the MAX

Table C-10. RJ-48C-Loopback plug specifications

Pair #

Signal

Male RJ-48C
1

 Receive

 1 (connects to 5)

2 (connects to 4)

2

 Transmit

 5 (connects to 1)

4 (connects to 2)
.

T1/PRI WAN ports

Table C-11 lists the pins on RJ-48C sockets on the MAX used for T1/PRI WAN interface. Only pins 1, 2, 4, and 5 are used. The remaining pins are not connected.

Table C-11. Transmit and Receive pins

MAX T1/PRI interface

RJ-48C DTE
Receive (input) pair, Tip (T1)

Receive (input) pair, Ring (R1)

 Position 2

Position 1

Transmit (output) pair, Tip (T)

Transmit (output) pair, Ring (R)

 Position 5

Position 4

WAN switched services available to the MAX

The MAX is compatible with both AT&T and Northern Telecom central office switches, and can access all T1/PRI switched digital services offered by AT&T's ACCUNET Switched Digital Services:

Note: The MAX can access only Switched-56 Kbps services on a T1 access line or a Switched-56 line.

For a listing of the compatible switch types, see the Switch Type parameter in the Reference Guide for the MAX. In addition to switched circuits, the MAX can connect to nailed-up circuits and to aggregate nailed-up and switched circuits.

E1/PRI interface specifications

The MAX unit's E1/PRI interface has cabling and port specifications. During loss of power or whenever the MAX restarts, a relay closure returns the E1/PRI signal to the WAN. That is, the E1/PRI line is looped back. However, if you configure the MAX for framing-compatible drop-and-insert functionality, all channels of line #1 are passed to line #2. Note that line #1 and line #2 of a MAX Net/E1 expansion module always loop back upon loss of power, regardless of how they are configured.

E1/PRI cable specifications

The WAN interface cables and plugs described in this section are available for the MAX unit's WAN interfaces. Use only the cable specifically constructed for transmission.

E1/PRI crossover cable: RJ-48C/RJ-48C

Install the RJ-48C/RJ-48C crossover when the WAN interface transmits on pins 5 and 4 and receives on pins 2 and 1. Figure C-7 and Table C-12 show the pinouts.

Figure C-7. RJ-48C/RJ-48C crossover cable

Table C-12. RJ-48C/RJ-48C crossover cable specifications

Model number RJ-48C-X

Part number 2510-0059/0323-001

Pair #

Signal (MAX)

Male RJ-48C (MAX)

Male RJ-48C (remote)
1

 Receive

 2

1

 5

4

2

 Transmit

 5

4

 2

1

E1/PRI straight-through cable: RJ-48C/RJ-48C

Before installing the RJ-48C/RJ-48C straight-through cable, verify that the WAN interface transmits on pins 2 and 1 and receives on pins 5 and 4. Figure C-8 and Table C-13 show the pinouts.

Figure C-8. RJ-48C/RJ-48C straight-through cable specifications

Table C-13. RJ-48C/RJ-48C straight-through cable specifications

Model number RJ48C-S

Part number 2510-0064-001

Pair #

Signal (MAX)

Male RJ-48C (MAX)

Male RJ-48C (remote)
1

 Receive

 1

2

 1

2

2

 Transmit

 5

4

 5

4

E1/PRI straight-through cable: RJ-48C/DA-15

Before installing the RJ-48C/DA-15 straight-through cable, verify that the WAN interface transmits on pins 3 and 11 and receives on pins 1 and 9. Figure C-9 and Table C-14 show the pinouts.

Figure C-9. RJ-48C/DA-15 straight-through cable

Table C-14. RJ-48C/DA-15 straight-through cable specifications

Model number DA15-X

Part number 2510-0082-001

Pair #

Signal (MAX)

Male RJ-48C (MAX)

Male DA-15P (remote)
1

 Receive

 1

2

 3

11

2

 Transmit

 5

4

 1

9

E1/PRI crossover cable: RJ-48C/DA

Before installing the RJ-48C/DA cable, verify that the WAN interface transmits on pins 1 and 9 and receives on pins 3 and 11. Figure C-10 and Table C-15 show the pinouts.

Figure C-10. RJ-48C/DA crossover cable

Table C-15. RJ-48C/DA crossover cable specifications

Model number DA15-S

Part number 2510-0065-001

Pair #

Signal (MAX)

Male RJ-48C (MAX)

Male DA-15P (remote)
1

 Receive

 1

2

 1

9

2

 Transmit

 5

4

 3

11

E1/PRI straight-through cable: RJ-48C/Bantam

The WAN side of the RJ-48C/Bantam straight-through cable connects to dual bantam jacks. Figure C-11 and Table C-16 show the pinouts.

Figure C-11. RJ-48C/Bantam straight-through cable

Table C-16. RJ-48C/Bantam straight-through cable specifications

Model number DBNT-RJ-45

Part number 2510-0066-001

Pair #

Signal (MAX)

Male RJ-48 (MAX)

Male Dual-310-P (remote)
1

 Receive

 1

2

 Tip 1

Ring 1

2

 Transmit

 5

4

 Tip 2

Ring 2

E1/PRI straight-through cable: MAX 6000 BNC to RJ-48C

The MAX 6000 BNC to RJ-48C cable adapts a modular E1 port on the MAX to coaxial cable E1 lines. You must also set the jumpers within the MAX for 50 ohm service. Figure C-12 and Table C-17 show the pinouts.

Figure C-12. MAX 6000 BNC to RJ-48C straight-through cable

Table C-17. MAX 6000 BNC to RJ-48C straight-through cable specifications

Part number 2510-0272-001

Pair #

Signal (MAX)

Male RJ-48C (MAX)

Male Dual-BNC (remote)
1

 Transmit

 4

5

 B1 Sleeve

B1 Center

2

 Receive

 1

2

 B2 Sleeve

B2 Center

E1/PRI WAN ports

Table C-18 lists the pins on RJ-48C sockets on the MAX used for E1/PRI WAN interface. Only pins 1, 2, 4, and 5 are used. The remaining pins are not connected.

Table C-18. Transmit and Receive pins

MAX E1/PRI interface

RJ-48C DTE
Receive (input) pair, Tip (T1)

Receive (input) pair, Ring (R1)

 Position 2

Position 1

Transmit (output) pair, Tip (T)

Transmit (output) pair, Ring (R)

 Position 5

Position 4

Note: E1/PRI models are also equipped with BNC connectors.

ISDN BRI interface specifications

The MAX unit's ISDN BRI interface has specifications for the Net/BRI module and the Host/BRI module.

Warning: To reduce the risk of fire, communication cable conductors must be 26 AWG or larger.

Attention: Afin de reduire les risques d'incendie, les fils conducteurs du cable de communication doivent etre d'un calibre minimum de 26 AWG (American Wire Gauge), c'est-a-dire d'un minimum de 0,404 mm.

Warnung: Um Feuerrisiken zu reduzieren, müssen die Kommunikationskabel-Anschlüße 26 AWG oder größer sein.

For the Net/BRI module

The Net/BRI module (MX-SL-8BRIN) connects to the WAN through a network termination (NT1) device. You must install a cable from the NT1 that ends in a 100 termination. The maximum distance between the NT1 and its termination is 3280 feet (1000 m). You can install the Net/BRI module anywhere along the length of the cable. Use only cable specifically constructed for ISDN BRI interfaces.

Note: In Belgium, install 10 m of cable between the Net/BRI module and the NT1. Significant data errors can result from use of shorter cables.

For the Host/BRI module

Each ISDN BRI line provided by the Host/BRI module (MX-SL-8BRIT) must end in a 100 termination. The maximum cable distance between the Host/BRI and its termination is 3280 feet (1000 m). You can install the local ISDN BRI device anywhere along the length of the cable. Use only cable specifically constructed for ISDN BRI S interfaces.

Serial host interface specifications

Specifications for the serial host ports on the MAX include cabling requirements, timing requirements, and interface types.

The MAX unit's serial host ports are compatible with the following three electrical standards:

The MAX also supports the following dialing/answering protocols at any of its serial host ports:

Selection of the proper cable between a serial host port and the serial device ensures:

In the cable wiring tables that follow, the MAX is the Data Circuit-Terminating Equipment (DCE) device, while the host equipment is the Data Terminal Equipment (DTE) device. The serial host interface cabling tables use the abbreviations listed in Table C-19. Note that the MAX supplies the Send Timing and Receive Timing clocks to the host.

Table C-19. Serial host interface cabling abbreviations

Abbreviation

Explanation
FGND

 Chassis Ground

SGND

 Receive Common Ground

SD+

 Send Data +

SD-

 Send Data -

RD+

 Receive Data +

RD-

 Receive Data -

ST+

 Send Timing +

ST-

 Send Timing -

RT+

 Receive Timing +

RT-

 Receive Timing -

TT+

 Terminal Timing +

TT-

 Terminal Timing -

DSR

 Data Set Ready

DCD (CD)

 Data Carrier Detect

RTS

 Request to Send

RI

 Ring Indicate

DTR

 Data Terminal Ready

DPR

 RS-366 Call Digit or Tone

ACR

 Abandon Call/Retry

CRQ

 Call Request

PND

 Present Next Digit

DLO

 Data Line Occupied

NB1

 RS-366 Call Digit or Tone

NB2

 RS-366 Call Digit or Tone

NB4

 RS-366 Call Digit or Tone

NB8

 RS-366 Call Digit or Tone

RX/SEL

 Select Interface Jumper (not a signal to or from host)

V.35 cabling

You can use V.35 cabling to connect the MAX to some Cisco routers, to a wide variety of serial hosts, and to CLI and PictureTel codecs.

V.35/V.25 bis cable to Cisco

The V.35/V.25 bis cable connects the MAX to the V.35 port of a Cisco router that uses V.25 bis dialing. Figure C-13 and Table C-20 show the V.35/V.25 bis cable pinouts.

Figure C-13. V.35/V.25 bis cable to Cisco

Table C-20. Pinouts for V.35/V.25 bis cable to Cisco

Pair #

Signal

(MAX)

MAX male DB-44

(MAX)

Host female V.35
1

 FGND

 1

 A

2

 SD+

SD-

 26

27

 P

S

3

 RD+

RD-

 2

3

 R

T

4

 ST+

ST-

 4

5

 Y

AA

5

 RT+

RT-

 14

15

 V

X

6

 DSR

DCD

 6

36

 E, F*

D

7

 RTS

RI

 7

43

 C

J

8

 DTR

SGND

 8

25

 H

B

9

 TT+

TT-

 16

17

 U

W

10

 RX/SEL

 28, 44*

Pin positions separated by commas are jumped to each other.

V.35 cable to generic serial host

The V.35 cable for connection to generic serial hosts connects the MAX to the V.35 ports of a wide variety of equipment. A female-to-male V.35 gender changer is included when you order the cable. Figure C-14 and Table C-21 show the V.35 cable pinouts.

Figure C-14. V.35 cable to generic serial host

Table C-21. Pinouts for V.35 cable to generic serial host

Pair #

Signal

(MAX)

MAX male DB-44

(MAX)

Host female V.35
1

 FGND

 1

 A

2

 SD+

SD-

 26

27

 P

S

3

 RD+

RD-

 2

3

 R

T

4

 ST+

ST-

 4

5

 Y

AA

5

 RT+

RT-

 14

15

 V

X

6

 DSR

DCD

 6

36

 E

D, F*

7

 RTS

RI

 7

43

 C

J

8

 DTR

SGND

 8

25

 H

B

9

 TT+

TT-

 16

17

 U

W

10

 RX/SEL

 28, 44*

Pin positions separated by commas are jumped to each other.

V.35/RS-366 cable to generic serial host

The V.35/RS-366 cable connects the MAX to the V.35 ports of a wide variety of equipment that uses RS-366 dialing. A female-to-male V.35 gender changer is included when you order the cable. Figure C-15 and Table C-22 show the V.35/RS-366 cable pinouts.

Figure C-15. V.35/RS-366 cable to generic serial host

Table C-22. Pinouts for V.35/RS-366 cable to generic serial host

Model number MBHD-V35-366

Part number 2510-0077-001

Pair #

Signal

(MAX)

MAX male DB-44

(MAX)

Host female V.35

RS-366 female DB-25
1

 FGND

 1

 A

2

 SD+

SD-

 26

27

 P

S

3

 RD+

RD-

 2

3

 R

T

4

 ST+

ST-

 4

5

 Y

AA

5

 RT+

RT-

 14

15

 V

X

6

 DSR

DCD/CTS

 6

36

 E

D, F*

7

 RTS

RI

 7

43

 C

J

8

 DTR

SGND

 8

25

 H

B

9

 TT+

TT-

 16

17

 U

W

10

 DPR

ACR

 9

10

2

3

11

 CRQ

PND

 11

12

4

5

12

 DLO

SGND

 13

25

22

7, 18, 19*

13

 NB1

NB2

 21

22

14

15

14

 NB4

NB8

 23

24

16

17

15

 DSC

 36

13

16

 RX/SEL

 28, 44*

* Pin positions separated by commas are jumped to each other.

V.35/RS-366 cable to CLI

The V.35/RS-366 cable connects the MAX to the V.35 port of the Compression Labs Rembrandt II codec with support for RS-366 dialing. Figure C-16 and Table C-23 show the V.35/RS-366 cable pinouts.

Figure C-16. V.35/RS-366 cable to CLI codec

Table C-23. Pinouts for V.35/RS-366 cable to CLI

Pair #

Signal

(MAX)

MAX male DB-44

(MAX)

Host V.35/RS-366

male DB-25
1

 V.35 FGND

V.35 DTR

 1

8

 1

8

2

 V.35 SD+

V.35 SD-

 26

27

 2

14

3

 V.35 RD+

V.35 RD-

 2

3

 3

15

4

 V.35 ST+

V.35 ST-

 4

5

 4

16

5

 V.35 RT+

V.35 RT-

 14

15

 5

17

6

 V.35 DSR

V.35 DCD/CTS

 6

36

 6

19

7

 V.35 RTS

V.35 RI

 7

43

 7

18

8

 V.35 TT+

V.35 TT-

 16

17

 4

16

9

 RS-366 DPR

RS-366 ACR

 9

10

 9

10

10

 RS-366 CRQ

RS-366 PND

 11

12

 11

12

11

 RS-366 DLO

SGND

 13

25

 13

25

12

 RS-366 NB1

RS-366 NB2

 21

22

 21

22

13

 RS-366 NB4

RS-366 NB8

 23

24

 23

24

14

 RX/SEL

 28, 44*

* Pin positions separated by commas are jumped to each other.

V.35/RS-366 cable to PictureTel

The V.35/RS-366 cable connects the MAX to the V.35 port of the PictureTel codec with support for RS-366 dialing. Figure C-17 and Table C-24 show the V.35/RS-366 cable pinouts.

Figure C-17. V.35/RS-366 cable to PictureTel

Table C-24. Pinouts for V.35/RS-366 cable to PictureTel

Model number MBHD-449PT

Part number 2510-0093-001

Pair #

Signal

(MAX)

MAX male DB-44

(MAX)

Host female DB-37

RS-366 female DB-25
1

 FGND

 1

 1

2

 SD+

SD-

 26

27

 4

22

3

 RD+

RD-

 2

3

 6

24

4

 ST+

ST-

 4

5

 5

23

5

 RT+

RT-

 14

15

 8

26

6

 DSR

DCD/CTS

 6

36

 11

9, 13*

7

 RTS

RI

 7

43

 7

15

8

 DTR

SGND

 8

25

 12

19, 20, 37*

9

 TT+

TT-

 16

17

 17

35

10

 DPR

ACR

 9

10

2

3

11

 CRQ

PND

 11

12

4

5

12

 DLO

SGND

 13

25

22

7

13

 NB1

NB2

 21

22

14

15

14

 NB4

NB8

 23

24

16

17

15

 DSC

 36

13

16

 RX/SEL

 28, 44*

*Pin positions separated by commas are jumped to each other.

RS-366 cabling

Ascend supplies a variety of RS-366 cables which you can use to connect the MAX to Video Telecom and to a wide variety of serial hosts.

RS-449/RS-366/DB-37 cable to Video Telecom

The RS-449/RS-366/DB-37 cable connects the MAX to the RS-449 port of a Video Telecom codec with support for RS-366 dialing. Figure C-18 and Table C-25 show the RS-449/RS-366/ DB-37 cable pinouts.

Figure C-18. RS-449/RS-366/DB-37 cable to Video Telecom codec

Table C-25. Pinouts for RS-449/RS-366/DB-37 cable to VTC

Pair #

Signal

(MAX)

MAX male DB-44

(MAX)

Host RS-449/RS-366 male DB-37
1

 FGND

FGND

 1

1

 1

19

2

 SD+

SD-

 29

30

 4

22

3

 RD+

RD-

 40

39

 6

24

4

 ST+

ST-

 42

41

 5

23

5

 RT+

RT-

 37

38

 8

26

6

 DSR

DCD/CTS

 6

36

 2

9, 11, 18*

7

 RTS

RI

 7

43

 7

15

8

 DTR

SGND

 8

25

 12

37

9

 RS-366 DPR

RS-366 ACR

 9

10

 14

3

10

 RS-366 CRQ

RS-366 PND

 11

12

 10

33

11

 RS-366 DLO

 13

 21

12

 RS-366 NB1

RS-366 NB2

 21

22

 16

28

13

 RS-366 NB4

RS-366 NB8

 23

24

 32

34

14

 RX/SEL

 20, 28*

Pin positions separated by commas are jumped to each other. This cable does not support terminal timing.

RS-449/RS-366 cable to generic serial host

The RS-449/RS-366 cable connects the MAX to the RS-449 ports of a wide variety of equipment that uses RS-366 dialing. A female-to-male DB-37 gender changer is included when you order the cable. Figure C-19 and Table C-26 show the RS-449/RS-366 cable pinouts.

Figure C-19. RS-449/RS-366 cable to generic serial host

Table C-26. Pinouts for RS-449/RS-366 cable to generic serial host

Model number MBHD-449-366

Part number 2510-0078-001

Pair #

Signal

(MAX)

MAX male DB-44

(MAX)

Host female DB-37

RS-366 female DB-25
1

 FGND

 1

 1

2

 SD+

SD-

 29

30

 4

22

3

 RD+

RD-

 40

39

 6

24

4

 ST+

ST-

 42

41

 5

23

5

 RT+

RT-

 37

38

 8

26

6

 DSR

DCD/CTS

 6

36

 11

9, 13*

7

 RTS

RI

 7

43

 7

15

8

 DTR

SGND

 8

25

 12

19, 20, 37*

9

 TT+

TT-

 31

32

 17

35

10

 DPR

ACR

 9

10

2

3

11

 CRQ

PND

 11

12

4

5

12

 DLO

SGND

 13

25

22

7

13

 NB1

NB2

 21

22

14

15

14

 NB4

NB8

 23

24

16

17

15

 DSC

 36

13

16

 RX/SEL

 20, 28*

Pin positions separated by commas are jumped to each other.

RS-449 cable to generic serial host

The RS-449 cable for connection to generic serial hosts connects the MAX to the RS-449 ports of a wide variety of equipment. A female-to-male DB-37 gender changer is included when you order the cable. Figure C-20 and Table C-27 show the RS-449 cable pinouts.

Figure C-20. RS-449 cable to generic serial host

Table C-27. RS-449 cable to generic serial host pinouts

Pair #

Signal

(MAX)

MAX male DB-44

(MAX)

Host female DB-37
1

 FGND

 1

 1

2

 SD+

SD-

 29

30

 4

22

3

 RD+

RD-

 40

39

 6

24

4

 ST+

ST-

 42

41

 5

23

5

 RT+

RT-

 37

38

 8

26

6

 DSR

DCD/CTS

 6

36

 11

9, 13*

7

 RTS

RI

 7

43

 7

15

8

 DTR

SGND

 8

25

 12

19, 20, 37*

9

 TT+

TT-

 31

32

 17

35

10

 RX/SEL

 20, 28*

* Pin positions separated by commas are jumped to each other.
.

Note: To manufacture an RS-449 cable for Cisco routers, use the wiring list shown in Table C-27 and connect the following DB-37 pins to SGND:

X.21 cabling

 Ascend supplies a single X.21 cable. You can use the X.21 cable for connecting to generic serial hosts. If your host is equipped with an X.21 interface, Figure C-21 and Table C-28 show the pinouts for the host cable.

Figure C-21. X.21 cable to generic serial host

Table C-28. Pinouts for X.21 cable to generic serial host

Model Number MBHD-X21

Part number 2510-0098-001

Pair #

X.21 signal name

(MAX)

Equivalent V.35/RS-449 signal name

(MAX)

MAX male DB-44

(MAX)

Host female DA-15
1

 G*

 SGND*

 25*

 8

2

 T(A)
T(B)

 SD+
SD-

 29
30

 2
9

3

 R(A)
R(B)

 RD+
RD-

 40
39

 4
11

4

 S(A)
S(B)

 ST+
ST-

 42
41

 6
13

5

 C(A)
I(A)

 DTR
DCD

 8
36

 3
5

6

 RX/SEL
I(B)*

 RX/SEL
SGND*

 20, 28**
25***

 12***

7

 B(A)
B(B)

 BT+
BT-

 18
19

 7
14

8

 C(B)

8, 10****

*

 Both I (B) and G connect to SGND, pin 25 on DB-44.

**

 Pins 20 and 28 on the DB-44 interface are jumped together.

***

 Connect pin 25 (DB-44) to pin 12 (DA-15) through a 200 ohm resistor.

****

 Connect pin 8 (DA-15) to pin 10 (DA-15) through a 200 ohm resistor.

Cable length requirements

Table C-29 specifies the recommended maximum length of the cable between the MAX and the serial host equipment. Longer distances at the specified data rates are possible when you use terminal timing. If you require still longer distances you can install the Ascend RPM, a hardware device that provides an extended-distance high-speed link between the MAX and the serial host equipment.

Table C-29. Cable length requirements

MAX cable length

Serial data rate
25 feet

 3 Mbps

75 feet

 2 Mbps

150 feet

 512 Kbps

Serial WAN cabling specifications

The MAX unit's serial WAN interface supports nailed-up connections to the WAN. Data packets from the MAX unit's bridge/router module can use this interface, but bit streams from devices connected to the MAX unit's serial host ports cannot.

The MAX unit's serial WAN port is compatible with the following two electrical standards:

V.35
RS-449/422

In the cable wiring tables that follow, the MAX is the Data Terminal Equipment (DTE) that connects to a Data Circuit-Terminating Equipment (DCE) device through its serial WAN port. The MAX receives the Send Timing and Receive Timing clocks from the DCE device.

V.35 cable to WAN

You can connect a V.35 cable to the V.35 port of a DCE device. Table C-30 describes the V.35 cable pinouts.

Table C-30. V.35 cable pinouts

Pair #

Signal

(MAX)

MAX male DB-44

(MAX)

Host male V.35
1

 FGND

RI

 1

8

 A

J

2

 SD+

SD-

 39

40

 P

S

3

 RD+

RD-

 30

29

 R

T

4

 ST+

ST-

 41

42

 Y

AA

5

 RT+

RT-

 32

31

 V

X

6

 TT+

TT-

 38

37

 U

W

7

 DTR

DSR

 6

11

 H

E

8

 DCD

SGND

 9

25

 F

B

9

 CTS

RTS

 7

36

 D

C

RS-449 cable to WAN

You can connect the RS-449 cable to the RS-449 port of a DCE device. Table C-31 describes the RS-449 pinouts.

Table C-31. RS-449 cable pinouts

Pair #

Signal

(MAX)

MAX male DB-44

(MAX)

Host female DB-37
1

 FGND

RI

 1

8

 1

15

2

 SD+

SD-

 39

40

 4

22

3

 RD+

RD-

 30

29

 6

24

4

 ST+

ST-

 41

42

 5

23

5

 RT+

RT-

 32

31

 8

26

9

 TT+

TT-

 38

37

 17

35

8

 DTR

DSR

 6

11

 12

11

6

 DCD

SGND

 9

25

 13

19, 20, 37*

7

 CTS

RTS

 7

36

 9

7

Pin positions separated by commas are jumped to each other.

IDSL specifications

Check with your provider regarding the network-interface specifications for the ISDN Digital Subscriber Line (IDSL) card. The card supports loopback testing. It includes an RS-449 cable for connection to a DCE device.

General specifications

Following are the general specifications for the IDSL card:.
Voice Channels

 2

Transfer rate

 128 Kbps (symmetric)

Transmission distance

 18,000 feet

Interfaces per card

 8 ports per card, up to 6 cards per system

Physical connectors

 RJ-45

Connector requirements

 Must meet JIS C 5973 standards

Card dimensions

 5.6 in high x 10.7 in long (14.2 cm x 27 cm)

Card weight

 ~2 pounds (0.9 kg)

Operating humidity

 0-90%, noncondensing

Operating temperature

 32-104° F (0-40° C)

Network-interface specifications

Specifications for the IDSL network interface are as follows:

The network interface is compatible with:

Loopback testing

IDSL provides the following types of loopback testing:


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