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DSU III DBU

ADTRAN

DSU III DBU

Card Type

Dial Backup DSU

Chip Set

Unidentified

I/O Options

25-pin DTE ports (2), V.35 DTE port, dial backup port (RJ-48), dedicated network port (RJ-48), power

Maximum Data Rate

64Kbps

ISDN Rate

64Kbps

ISDN Modulation Protocol

HDLC, PPP

Line Coding

2B1Q

Data Bus

External

CONNECTIONS

Function

Label

Function

Label

Dedicated network port - line 1

CN1

V.35 DTE port

CN5

Dial backup port - line 2

CN2

Power

CN6

25-pin DTE port - auxiliary

CN3

Power switch

SW1

25-pin DTE port - primary

CN4

   

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

RS

Unidentified

On

RTS signal high

RS

Unidentified

Off

RTS signal low

CS

Unidentified

On

CTS signal high

CS

Unidentified

Off

CTS signal low

TD

Unidentified

On

Data is being transmitting from DTE

TD

Unidentified

Off

Data is not being transmitting from DTE

RD

Unidentified

On

Data is being received from network

RD

Unidentified

Off

Data is not being received from network

CD

Unidentified

On

Frame synchronization is established. Device is ready to transmit/receive data

CD

Unidentified

Off

Frame synchronization is not established. Device is not ready to transmit/receive data

ALM

Unidentified

On

Open loop, loss of frame synchronization, dial backup mode, or problem with dial backup line alarm condition detected on network

ALM

Unidentified

Off

Open loop, loss of frame synchronization, dial backup mode, or problem with dial backup line alarm condition not detected on network

TST

Unidentified

On

Device is conducting a test

TST

Unidentified

Off

Device is not conducting a test

SUPPORTED COMMAND SET

Basic AT Commands

AT, A/

A, E, H, O, Q, V

&C, &D, &F, &K, &L, &Q, &R, &S, &V,&X, &Z

Extended AT Commands

\N, \T

%A, %C,

 

Note: See MHI Help File for full command documentation.

NON-STANDARD COMMAND SET

Basic AT Commands

Z

Extended AT Commands

%B, %K, %P, %P=x, %P>x, %R, %T

_A, _B, _C, _D, _E, _F, _G, _H, _I, _J, _K, _L, _N=xx, _P, _RR, _S=x, _T, _X, _Y

 

Note: Full documentation is unavailable for non-standard AT commands

TEST COMMANDS

TEST MODES

Type:

Immediate

Format:

AT [cmds] &Tn

Description:

Selects test options

Command

Function

&T0

End current test

&T1

Begin local analog loopback test

&T3

Begin local digital loopback

&T6

Request remote digital loopback

&T7

Request remote digital loopback and self-test

&T8

Begin local analog loopback and self-test

&T9

Begin local self-test

&T10

Begin local DTE and anolog loopback test

&T11

Begin local analog loopback test

TEST PATTERNS

Type:

Immediate

Format:

AT [cmds] _Tn

Description:

Selects test pattern options

Command

Function

_T0

Begin test using 2047 pattern

_T1

Begin test using 511 pattern

_T2

Begin stress test using pattern #1

_T3

Begin stress test using pattern #2

_T4

Begin stress test using pattern #3

_T5

Begin stress test using pattern #4

Note: Commands must be used in conjuction with T7 or T8 to select analog or remote test pattern.