johny2001

[Guest_imported]

aix/perts,

i'm trying to configure a modem connected to a RAN @ port#0; it's tty2. 'been puzzled coz i successfully configure the "tty port" (with rj45 to 25-PIN DB cable), but;

the problem:

Force Carrier enable
Use Alternate RJ-45 Pinouts enable

with ff. baud rate:

1. setting modem to 19200 = couldn't establish login session but modem's connected

2. setting modem to 9600 = won't answer, line dropped

any ideas?

NOTE: modem's working when connected to serial 1 & 2.

 

[michealclark]

one thing you can try is adding clocal to the STTY attributes for RUN time and LOGIN. make sure you have login set to enable. and you can check for a getty session by doing a ps -ef |grep getty at a root prompt.

Hope that helps
Micheal

 

[Guest_imported]

Physically attaching the modem
Attach a direct (modem) cable between the modem and any open serial port on the system.

Common options
native serial port on back of system
8 port adapter attachment
16 port adapter attachment
64 port adapter attachment
128 port adapter RAN
mike,

sorry - don't get it. can u expand further?

below is a note from IBM site, is it the reason? any idea?

NOTE: Although a modem can be attached to a 16 port adapter it is not recommended. The 16 port adapter had RTS looped back to CTS at the connector (physical RTS and CTS lines do not run between the system and the modem as they do in the other options). This renders RTS (hardware) flow control impossible resulting in possible data loss, communication errors, or no connection ability at all.

All options require a direct cable but each adapter has different pin-outs and requires a different connector on that direct cable (most modems are db-25 connected but there are some variations on the market).