User's Manual

EX7100 Technical Manual – Monitoring and Diagnostics
©1999 Exicom Technologies (1996) Ltd 4-12 Issue 1 - February 2001
Local Loopback
In Local loopback mode, the transmit 64kbps digital data stream, from the user interface,
is looped within the framer to the receive 64kbps digital data stream, back to the user
equipment. This enables the user to check the interface between the EX7100 and the user
equipment.
Notes: Local loopback operates for both G.703 and Synchronous Data inputs.
Remote Loopback
In Remote Loopback mode, the received RF into the EX7100 terminal is looped to the
transmit RF line. This enables the user to check the radio path of the system.
Both loopbacks can be enabled for the local terminal as well as the remote terminal.
Enabling Digital Loopbacks
1) From idle, press ‘Enter’.
Use the arrow keys to enter the First Level
password ‘1111’ and then press ‘Enter’.
2) Use the up and down arrow keys to make
sure the →
→→
→ is next to Framer and then
press ‘Enter’.
3) Use the up and down arrow keys to make
sure the →
→→
→ is next to Loopback and then
press ‘Enter’.
4) Use the up and down arrow keys to
choose the required loopback and then
press ‘Enter’.
5) Use the keypad to enable the loopback
function.
Note: Ensure that the loopback mode is disabled when testing is completed.
Warning: Digital loopbacks should only be used with the system set for G.703 or V.35
(sync data) input. Do not attempt to use the digital loopbacks when the
EX7100 interface is set to Exchange or Subscriber. Doing this may cause the
subscriber telephones to ring continuously.
Password ∗ ∗ 1 ∗
↑
RF parameters
→framer
ber
→loopback
local
→remote
off
→on