Asset ID:	1-72-1007671.1
Update Date:	2009-11-17
Keywords:

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Solution Type  Problem Resolution Sure

Solution  1007671.1 :   Modem on a Sun Fire[TM] V60x/Sun Fire[TM] V65x server that connects then hangs with no login.  


PreviouslyPublishedAs
210627

Symptoms
After installing a dialin modem on a Sun Fire[TM] V60x or V65x COM2 port the answering modem will ring, connect, then hang. No login prompt appears. There is an active dialin ttymon login process running and the modem can dial out.

Specific Sun Fire servers like these V60x and V65x have an internal jumper that needs to be changed to activate the Data Carrier Detect (DCD) signal used for dialin logins. It is not required for dialout and is not active by default.

When the answering modem connects it sends this DCD signal back to a monitoring login service. In turn, the login service issues a login to the remote user. If this DCD signal is missing, the login service will never know the modems connected. Consequently, the modem will sit there with many lights lit including CD/DCD because the DCD path back to the login service doesn't exist.

Resolution
Within the server towards the rear there is a jumper block located on the Motherboard labeled J5A2.

Positioning the jumper between pins 1 and 2 will enable the DCD signal. When in this position pin 7 on the COM2 port will be DCD. The default jumper position is between pins 3 and 4. Once you enable the modem it will then be able to send back the DCD signal to the login service.

J5A2 (DCD enabled)
5 3 1
|
6 4 2

J5A2 (default)
5 3 1
|
6 4 2

Additional Information
This may apply to SunFire V20z and V40z servers also.


Product
Sun Fire V65x Server
Sun Fire V60x Server

Internal Comments
Audited/updated 11/17/09 - James.Carter@Sun.COM, x64 Content Team

Source: Sun Fire V60x and Sun Fire V65x Servers - Troubleshooting Guide - Nov 2003

SS4A7PQ Internal ID use only.

modem, dcd, connect, no login, rj45, jumper, J5A2, Modem, Hang After Dial, Hang After Boot
Previously Published As
79619

Change History
Date: 2006-07-05
User Name: 71396
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Version: 0
Date: 2005-07-19
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Date: 2005-07-19
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Version: 0
Product_uuid
079e9bbc-0ee3-11d7-8c50-f1061905b56f|Sun Fire V65x Server
03728cec-0ee3-11d7-9be8-dd41f651e0a3|Sun Fire V60x Server

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