3Com ACCESSBUILDER 7000 User Manual - Dte Port Pin Assignments

A

-

8

A

P

P

E

N

D

I

X

 A: 

M

O

D

E

M

 S

P

E

C

I

F

I

C

A

T

I

O

N

A

N

D

 I

N

T

E

R

F

A

C

E

 P

I

N

 A

S

S

I

G

N

M

E

N

T

S

DTE Port Pin Assignments

Each m

odem is equipped with a single serial port marked DTE, which 

can be used to enter asynchronous AT or V.25bis commands, and pass 

asynchronous or synchronous user data. This is a female 26-pin V.24 

connector

 and can be used with X.21/V.11, v.24/V.28 or V.35/V.36 

signalling. The cable pin-outs for each type of cable are shown below.

X.21/V.11

The DTE port terminates with a 26-way miniature SCSI connector. The port 

can be configured to support V.11 signalling characteristics. The DTE port 

connecting cable is not supplied with the module. The following signalling 

characteristics should be observed when purchasing or fabricating a 

suitable cable.