Solved

Using an external or internal modem on a VMWare host

Posted on 2008-10-09
5
2,424 Views
Last Modified: 2013-12-27
I need a VM to have the ability to dial out using either an internal or external modem.  Currently I have both but I don't think the VM host will detect the internal modem since it is essentially a Winmodem.  Besides, VMWare support told me that they don't support it.  

I have the external modem connected to the serial port and I added both the serial ports on the host to the VM.  I assume I now add the modem in the VM OS and assign it to either port 1 or 2 correct?  

Thanks in advance!
0
Comment
Question by:neilmccabe
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
5 Comments
 
LVL 3

Accepted Solution

by:
bertgeysels earned 200 total points
ID: 22685137
Yes, you can map the com (and/or LPT) ports to the VM. So your VM should see an external modem.
Except if you use ESX 3i which doesn't allow the mapping of com or LPT.
And vmotion, DRS, HA won't be possible for that VM.
0
 

Author Comment

by:neilmccabe
ID: 22686630
OK, so I have an external serial modem and I have that attached to the serial port on the ESX server.  I then add the serial ports into the virtual machine (Doesn't show me COM ports, only dev/ttyS0 and dev/ttyS1).  I would then go into the VM and add a modem and assign it to one of the COM ports (1 or 2) are the only options...

Sound right?  Doesn't work tough...Get a message when trying to dial out about "problem detected with the hardware, bla bla..."
0
 
LVL 3

Expert Comment

by:bertgeysels
ID: 22687228

When adding the serial port to the VM, did you check the "Yield CPU on poll" (under advanced button) ?
And the VM OS, is it windows? Did you try auto detecting modem?

As an alternative, you could look into the option to use serial over ip (eg Avocent ESP). The modem is located on a network device and all traffic to the modem from the VM is send over ip. This has as a bonus that vmotion etc can be used for the VM.
0
 

Author Comment

by:neilmccabe
ID: 22687841
Yes, the "Yield CPU on Poll."  The VM is Windows OS.

Wouldn't I have to go in and somehow create a new modem using the one of the serial COM ports?
0
 
LVL 1

Expert Comment

by:serrato01
ID: 22908688
We're trying to do the same deal with a fax modem. We added the serial port for the guest OS from the VI client and told it to use /dev/ttyS0. From the guest OS we just rebooted it and it found the device, installed generic windows drivers. It all seems to work but our problem is the faxes we send come out garbled on the other end. I've opened a ticket with VMware to see if they have any better info on it. There is not much information on this type of setup.
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Resource timeout across a VPN 9 26
SAS Storage with Vcenter 6.0 4 85
SBS2011 fails to start 36 61
NAS ISCSI Sharing 8 36
In this step by step tutorial with screenshots, we will show you HOW TO: Enable SSH Remote Access on a VMware vSphere Hypervisor 6.5 (ESXi 6.5). This is important if you need to enable SSH remote access for additional troubleshooting of the ESXi hos…
When rebooting a vCenters 6.0 and try to connect using vSphere Client we get this issue "Invalid URL: The hostname could not parsed." When we get this error we need to do some changes in the vCenter advanced settings to fix the issue.
Teach the user how to configure vSphere clusters to support the VMware FT feature Open vSphere Web Client: Verify vSphere HA is enabled: Verify netowrking for vMotion and FT Logging is in place or create it: Turn On FT for a virtual machine: Verify …
This video shows you how easy it is to boot from ISO images for virtual machines with the ISO images stored on a local datastore on the ESXi host.

761 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question