RBS 2202 is a high quality, high capacity 2G radio base station designed specifically for indoor mounting. Its main usage is in large multicasting systems (networks).
It is available for GSM 900, GSM 1800 and GSM 1900 MHz and can be equipped with 6 TRUs in one cabinet. Two cabinets are ususally used to form a 12 TRU cell.
The RBS 2202 supports the use of battery backup. Batteries are located in a separate battery stand (another same size RBS 2202 cabinet) providing 1 to 8 hours of backup time. Battery backup is only possible when using 230v AC as the power supply voltage.
It is designed for a technical lifetime of 25 years @ 24 hours of operation. The RBS 2202 is always used with external antenna systems (see in the picture) where the feeder cable comes into the top of the cabinet.
The following preventive maintenance conditions must be fulﬁlled to guarantee the availability of the RBS.
Fans: The fans must be inspected (cleaned if necessary) every year. The life time of the fans are estimated to be at least 5 years.
Air ﬁlters: The air ﬁlters must be regularly inspected and cleaned (the interval depends on the environmental conditions at the site).
Synchronization: If a DXU-03 (T1, 1.5Mbit/s, 100ohm) is used, the frequency of the built in crystal oscillator shall be measured and aligned (calibrated) at least every third year.
The cabinet is vandal resistant and unauthorized access is not possible without damaging the unit.
A fully equipped RBS 2202 radio cabinet including base frame and cowl weighs of 226 kg. It stands at a total height of 1900 mm.
The above picture shows rows of Line Switch Modules (LSM's) neatly lined up awaiting their fate. This scene reminds me of what it looked like when we were installing the AXE switches. Sadly, this once busy switch is now being dismantled with its subscribers and their traffic already having been migrated to a Next Generation (Voice over IP) based node. The above AXE10 was a fantastic switch and carried traffic in service for over 20 years without any outages.
This is an alarm panel from the 80's and 90's generations of BYB202 AXE10. Easy to interperate with A1 and A2 class for the APZ (processor), APT (switching), POWer and EXTernal alarms.
O1 and O2 are Observation alarm classes.
ATT is for ATTendance activated by command by AXE personnel when on site (site attendance).
The white gas mask shaped things are acually speakers and beep when there is an alarm.
TYN and MAN are the names of the sites this panel serves.
Twenty four years to the day since I have been around AXE10. Here I am standing next to an in service APZ211*11. If I could live my life over I would join Ericsson and become an AXE10 engineer again. Two of my good friends (now passed the great divide) were part of the team that installed and commissioned this site in 1990. They done a fantastic job.
Work around enough AXE's and you will come across one of these units. These are the typical airconditioner units that are used in an exchange room containing an Ericsson AXE10 BYB202. They are made by Weatherite Building Services Ltd who have thier head office in Aldridge near Walsall.
The control panel has controls catogories for the Supply fan, Condenser Fan, Compressor #1, Compressor #2, Cooling and Heating.
IOG 11 belongs to what is called an SP-based IO System.
SP is an abbreviation for Support Processor. It is the separate processor that control the IO system functions, for example. the hard disks, optical disks, floppy disks and all the Alpha numemric (AT) terminals, later called Local Craft Terminals (LCT's) and all other communication links between the AXE and humans or other computer systems. i.e. X25/V36 protocol links.
Several variants of the SP-based IO Systems existed including IOG 11A, IOG 11B, IOG 11C, IOG 11B5, IOG 11C5 and IOMC.
Updated picture from my library.
This is an Ericsson Media Gateway (MGw) from 2002. Think of a media gateway as a bridge between the TDM networks and the IP networks. PCM voice traffic from a TDM network is repacked by the media gateway into ATM cells (AAL1) for transmission over the IP networks. Another term used for this is Soft switch (or soft switching) where API software is used to bridge the public switched (PSTN) networks with the IP networks.
The MGw is located at the border between the access network and the CORE network carrying both voice and data seperately. The MGw alternatives are ATM, IP and occasionally MPLS.
In an IP based CORE (as opposed to a TDM CORE) there are two variants of MGw. The EDGE-MGw towards the access network (AN) and the Interworking -MGw towards other networks such as WiMAX networks.
During my 10 years on BT Public Systems we used these keyboards to communicate with the AXE10 switches. It was on after the introduction of Windows 98 that we using laptops and desktops to talk to the switch. The tandberg terminal were so called dumb terminals. (A terminal that depends on the host computer for its processing power is called a dumb terminal or thin client)
The card we are looking at here (labeled RP64) is an RP4-H card. RP4 stands for Regional Processor Generation 4 being a newer version of the traditional AXE10 BYB202 Regional Processor.
The primary benefit for RP4 is that it is co-located in a subrack with the Extension Modules (EM's) that it controls. In AXE10 RP's control EM's and EM's control devices.
The RP4 is only found in BYB501 / AXE810 generation of AXE10 and does away with parallel buses, instead having a serial bus cable as seen above RPB S/O and RPB S/I. (Serial out and Serial in)
These buses are actually cables that are cabled directly back to the Central Processor (APZ212*33 in the above case)
The above picture shows the hardware architecture of the generic device magazine, also known as a subrack. As I said above, in AXE10, RP's control EM's and EM's control devices which can be clearly seen in the picture.
CP controls RP4 which controls the EM's which contain (and control) devices. A device can be any entity that provides a service such as a line circuit (LIC) on a line board (LIB) for instance. An example of a LIB in AXE10 is ROF 137 4442/1 LIC12.
This is a Spanish Ericsson DIAmuX Access Node (AN) centrally located in the Local Exchange (LE). The racks are hinged so that the sub-racks can be swung out giving access to the rear of the shelves.
The Access 300 Diamux 500 is designed for generic, flexible and integrated access and small digital cross connect
applications. It is based on flexible system design, well suited to meet demanding requirements of a modern access network.
The Diamux 500 is intended to serve as a large access node handling traffic from multiple-service 2 Mbps lines and
collecting POTS, ISDN and Leased Line services etc. into single-service aggregate lines.
This is a microcomputer unit from the Ericsson ROF 137 7852/1 R4B SLCT3 card. Card manufacture date is 1997 week 22.
Chip manufacturer: Motorola.
Category: 8-bit HCMOS microcomputer unit.
Introduction Technology: high-speed and low-power MCU; enhanced 16-bit timer system with four-stage programmable prescaler; power saving STOP and WAIT modes; serial peripheral interface (SPI); 256 bytes of static RAM; eight-channel 8-Bit A/D converter
Max. clock frequency: 2 MHz
This card now labeled ROF 137 1533/1 R2B/A LTC has 99W01 as its manufacturing date but a side label shows the original manufacture
date printed F3 8412 (1984 Week12 from factory F3).
I am guessing that this card started out life as an R2B and was sent back to Ericsson (or to a 3rd party) on 1999W01for modification & upgrade to R2B/A.
1984 Week12 is sometime from Monday 19th to Sunday 25th 1984.
If we decide the card was manufactured on the Monday then the approximate duration calculation results are;
From and including: Monday, 19 March 1984
To and including: Friday, 9 September 2011
Is 10,036 days from the start date to the end date, end date included.
Or 27 years, 5 months, 22 days including the end date
Alternative time units
10,036 days can be converted to one of these units:
1433 weeks (rounded down)
Yep, AXE10 is getting old!... but its still in service. The above card went down with worn out relays. It was repaired and sent back out to its site in Denmark. I hope shes in service for another 27 years!
Duration calculation by: http://www.timeanddate.com/
This is one of the old Tandberg (VT100) terminals that we used to use in order to talk to the AXE10 BYB202 PSTN switches. System X PSTN switches also used these terminals. It is what they call a dumb terminal.
We also would have had a keyboard (with a card reader attached to it) that we could swipe a pass card through so that we could access the switch.
We stopped using Tandbergs soon after Windows98 came in.
Here we are flying in China Xinhua Airlines Boeing 737-332 (SF) B-2942. This was an internal flight that I took from Beijing so that I could attend meetings at the Ericsson R&D office in Nanjing. Through the internet I have found the following details about this aircraft.
Construction Number: 25997.
Line Number: 2506.
First Flight with Xinhua Airlines: 13-07-1993.
Airframe Status: Active +20 Years.
Previous Operator: Ex-Delta Air Lines.
This aircraft started life as N304DE Boeing 737-322 for Delta airlines fitted with 2x CFMI CFM56-3B1 and was delivered to Delta airlines on the 02-08-1993.
Delivered to China Xinhua airlines as B-2942 on 16-11-1993 and remained in Xinhua service until wfu (withdrawn from use) in march 2010.
Delivered to Yangtze River Express cvtd (converted) to Cargo 27-07-2010. Remains B-2942 with 2x CFMI CFM56-3B1 engines.
Picture source: My own library.
This is an Ericsson AGM415 PSTN line card from the DIAmuX system.
I am trying to source the Resistor Networks for AGM415.
Can you help?
Above pictures: From my own archives.
The Ericsson AXE10 system uses address plugs that directly plug onto the cards in order to give the unit an address. The above address plug RNV 99103/20 R1A is typically used to address the Regional Processor magazines. RNV99103 also is used to address the EMRP (Extension Module Regional Processor) cards of the LSM magazines as shown in the below picture.
Product function: Address plug.
Product code: RNV99103/20.
Quarter plug: RNV304002.
Manufactured: 1998 Week 23.
Above: An EMRP card from an LSM shelf of an Ericsson RSS EMG addressed as EM-0.
EMRP: Extension Module Regional Processor.
LSM: Line Switch Module.
RSS: Remote Subscriber Stage.
EMG: Extension Module Group.
EM: Extension Module.
Picture source: My own archive.