User Manual
Table Of Contents
- Optical Master Unit
- Contact Information
- About This Manual
- For whom it is Intended
- Notice
- Confidential - Authorized Customer Use
- Disclaimer of Liability
- Warrantee
- Table of Contents
- 1 Introduction
- 2 Installation
- 3 Setup
- 3.1 Initiate Local Communication
- 3.2 Configure the OMU
- 3.3 Fiber Loss Compensation and Master Attentuation
- 3.4 Integration into AEM
- 3.5 Set Up OMU-Repeater System
- 3.6 Balance the System
- 3.7 Initiate Fiber Loss Compensation
- 3.8 Set up Remote Communication
- 3.9 Integrate into the AEM
- 3.10 Installation Examples
- 4 Troubleshooting
- 5 Maintenance
- 6 Specifications
OPTICAL MASTER UNIT
PRODUCT DESCRIPTION AND USER’S MANUAL
© Axell Wireless Ltd 39
In order to have good signal quality, Axell Wireless recommends that the signal strength should be
better than -95 dBm. If signal strength is lower, try to adjust the antennas to get a better signal
strength from the donor.
Documentation of +CSQ command from a modem’s manual.
In the example the reply to
AT+CSQ is 0,7 meaning 7*2 dB
above -113 dBm; the modem
detects a signal level of -99 dBm.
Problem 2a
OMU is configured properly, and answers the incoming call, but when trying to dial the OMU using
an analogue mode, no modem handshaking is heard from the dialling modem.
Problem 2b
When dialling the OMU, the OMU answers the incoming call, but no connection is established, and
after a while the OMU disconnects the call.
Solution
The most common cause is that the number called is the voice number of the SIM, not the data
number. Therefore, make sure to dial the data number.
If data call is used, the problem probably is an illegal modem initialization string.