DATA-LINC GROUP
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PN 161-09990-002C
rev 3/29/04
SRM6200E-SLC User’s Guide
Troubleshooting
“I have two radio modems, one configured as a master and the other as a remote. When they are plugged in, the
LEDs indicate they are receiving power, and yet they will not connect. Why not?”
There are several reasons why this may occur:
1. No antenna attached to the Modem.
2. The radio modems are not in each other’s Call Books.
3. The number of the Remote is in the Master’s Call Book, but the Master’s menu is not set to call that
number.
4. The Master is set to Call All and a setting of 000-0000 precedes the number of the Radio Modem
with which you are trying to communicate.
“I am able to link to a remote unit within line of sight when the SRM6200E-SLC I have is outside. However, as
soon as I walk inside with it I lose the link, even if I place the Radio Modem by the window which faces the
Remote unit.”
Many modern buildings use energy efficient glass that wreaks havoc on RF signals. This glass contains a metal film that is
very effective in blocking all radio waves. If your situation is as described above the preferable solution is to install an antenna
outdoors.
“I have several radio modems set up to communicate with each other in a point-to-multi-point mode, yet they are
not establishing contact.”
In a multi-point system there are two critical parameters which must be set correctly to establish a communications link:
1. The Remote’s Call Book must contain the Call Book Number or Network ID of the Master and/or Repeater(s) to
which it will be communicating.
2. All radios must be set to run at the same RF data rate. Remote modems must match the Masters RF data
rate.
“In bench testing several units in a multi-point system, it appears that they are not communicating through the
multi-point repeater. When all units are powered the remotes’ Carrier Detect lights are on, indicating a
connection, yet when I unplug the repeater those remotes set up to communicate through that repeater remain
connected.”
In a multi-point system a remote will attempt to communicate with any master or repeater (which looks like a master in a
multi-point system) that is in its Call Book. Therefore, it may be that the Remotes are communicating with the Repeater
when it is powered, and when it is unplugged they are establishing a link with the Master. To test whether or not this is what
is occurring, go into the Call Book of the Remotes which are set up to communicate through the Repeater and remove the
Master’s Call Book Number. When all units are powered the Remotes’ Carrier Detect lights should be green, when the
Repeater is unplugged the Remotes should lose contact and Carrier Detect should turn off.
