Erriccson AXE10 Digital Switch Info By Keltic Phr0st =================================== ================
The Erriccson digital switch is one of the most widely used pieces of telecommunications equipment in Operation today. Working alongside more primitive UXD5b, TXE2/4 and 5AESS units, it stands out as a more user friendly and feature packed device.
The switch is also relied on heavily for cellular wireline links, and it is in this area in which it basically shits on the equivalent GEC Plessey equipment from a great height, allowing quicker fault finding, maintennance, and dynamic operation. What follows is a small description of the key components encountered during day to day test operations and maintennance.
(Compiled from CBT AXE Switch Maintennance tutorial)
ALLIP; Obtain alarm list printout, F1 frees terminal to print device EXPOP; Find fault Position, Give Exchange, Floor, Row, Cab and shelf REMEI; Commence Test Blocking of Equipment mount RECEI; Commence Test De-Blocking of Equipment mount
The following publications contain all the Information required for AXE10 daily operation and maintennance. They can be obtained from Erriccson by simple engineering, or simply stolen or trashed:
Grey Folders, marked: B11 - Command Descriptions
B13 - Printout Descriptions B03 - Operational Instructions
DP : Device Processor
TG : Tone Generator
TP : Test Point
RG : Ringing Generator
SULTD : Subscriber Line Test Device
ACCSC : Access Selector Circuit Board. A selector that gives devices
for line test metallic access to a different Extension.
DEVPU : Device Processor Unit, used for control of the SULTD and special
equipment in digital subscriber stages.
EMG's : Equipment Module Groups, points which can be optionally connected.
DTG : Generates up to eight independent tones and under regional
processor control, interrupts and distributes those to tone injection.
EMPC : Works with memory board to form an extension module regional
processor (EMRP); Communicates with surrounding world via buses.
KRD : Keyset code reception device, together with line adaption unit,
is used for reception of subscriber signals in the form of two simultaneous frequencies selected from two seperate groups. (Correct me if I'm wrong, but doesnt the above sound like the device that handles all the DTMF signalling from subscribers before it is then fed to the switching unit itself? -=KpT=-)
LTAB : Same basic operations as SLTC, but provides different functions.
Provides interface to LIC, tone sending, ring generation supervision.
MEU3 : Memory Board, stores information.
POU : Contains two DC/DC converters which convert the exchange battery
voltage into two regulated voltages independent of each other. Supplies power to magazine in which it is mounted.
REU : DC/AC Converts exchange battery voltage to alternating voltage
for ringing signals.
SLTC : Subscriber Line Test Equipment (SULT) is used to test subscriber
lines. Connects the LTAB board. Connected both to subscriber line and to possible operator via SLCT, ACCS and the test access on LIC.
More Information can be leeched from:
MV/ETX/TI/KR Hakan Mattsson
Tel : +46 8 7194683
On Screen F-Keys :PF1 = UPD
PF2 = ADD
PF3 = BWD
PF4 = FWD
PF5 = DEL
PF6 = BARPR
PF7 = EET
PF8 = GROUP
PF9 = EXSL
PF12 = UNSL
PF13 = BRS
PF14 = INDEX
PF15 = BLK
PF16 = J/TX
PF17 = COPY