nisation. In mcBSC and mcTC, the unit operates in client (slave) mode. Combined IEEE1588v2 PTP modes with SyncE is also supported.
The synchronisation Plug-in unit (PTUM) in Standalone mcBSC uses the following syn- chronisation sources:
• 2.048 / 1.544 MHz according to G703 • PCM (E1 / T1)
• Ethernet according to IEEE 1588v2
• Synchronous Ethernet for optical connections
Following external interface connections are supported by PTUM: • 2 x RJ-45 for E1/T1/JT1 (framed/plain) clock based synchronisation
• 2 x SFP (Optical and Copper) for Timing over Packet and Synchronous Ethernet based synchronisation
The synchronisation Plug-in unit in mcTC (PTU) uses the following synchronisation sources:
• Ethernet according to IEEE 1588v2
• Synchronous Ethernet for optical connections
Following external interface connections are supported by PTU:
• 2 x SFP (Optical and Copper) for Timing over Packet and Synchronous Ethernet based synchronisation
Steps
1 To set the role of PTUM (DYA).
ZDYA:PTUM,0:I,C:LP=<IP address of PTUM ETH0>,RP=<IP address of TopSync server>:;
2 To interrogate the role of PTUM (DYB).
ZDYB:PTUM,0:I,C:LP=<IP address of PTUM ETH0>,RP=<IP address of TopSync server>:;
3 To delete the role of PTUM (DYD).. ZDYD:PTUM,0:;
4 To modify the parameters of synchronization (DYM). ZDYM::PTUM,1:SFP,1:PRI=3;
5 To interrogate synchronization system information (DYI). ZDYI:REF;
6 To set system clock forced reference (DYS). ZDYS:MCBC,0:EXT,1:REL;
7 To modify parameter of outgoing synchronization clock (DYR). ZDYR:PTUM,0:EXT,1:ACT=ENA,CLK=E1;
8 To display the information of outgoing synchronization clock (DYO). ZDYO;
7 Adding DN2, SSS, DMR and BBM to the
service channel
The connection between the BSC and the managed equipment is established either through a BSC-BTS O & M link or a Q1 service channel. The possible equipment types at a Base Transceiver Station (BTS) site include Base Station Interface Equipment (BIE), Transmission Unit (TRU), Digital Microwave Radio Link (DMR), and other trans- mission equipment (TRE).
All equipment with the same alarm unit type must have a unique index in the BSC con- cerned. All equipment in the same channel must have a unique address.
DN2 The Q1 service channel comes in TSL31 bits 7-8 to the 2M port of the DN2 interface unit (IU2). The Q1 service channel is forwarded through an extra loop connection to the Control Unit (CU); either one port of the IU2 is connected to the 2M interface of the CU or two IU2 ports are con- nected together with a local cable. The supported baud rates of the service channel are 1200, 2400 and 4800.
SSS The Supervisory Substation is located in the same rack with other trans- mission equipment, normally with the DN2. The Q1 service channel is forwarded to the SSS with a local cable.
DMR The Digital Microwave Radio link cannot pick the Q1 service channel from a time slot. The Q1 service channel is forwarded to the DMR with a local cable from another source, normally DN2. The supported baud rates of the service channel are 1200, 2400, 4800, and 9600.
BBM The Baseband Modem cannot pick the Q1 service channel from a time slot. The Q1 service channel is forwarded to the BBM through an Inte- grated Line Terminal (ILT) plug-in unit from the DN2.
TRE Other types of transmission equipment, for example optical line equip- ment, are handled in the BSC with the common name Transmission Equipment (TRE).
Figure 20 Transmission equipment at Q1 service channel For an overview, see Overview of BSS integration.
MMI SYSTEM MML DN2 ILT S S S D M R T R E BBM TRE Q1 ch Q1 ch NetAct LocalQ1 bus X.25/ LAN
Steps
1 Create the service channel (QWC).
ZQWC:<service channel number>, [S | P def]:<baud
rate>,<bandwidth>,<used bits>:<external PCM-TSL>,<sub tsl>; If you want to utilise Q1 bus protection in BSC, you must create secondary channels for all the primary Q1 channels that are to be protected.
2 Add equipment to the service channel (QWA).
ZQWA:CH=<service channel number>:DN2=<DN2 index>:<alarm unit address 1>;
ZQWA:CH=<service channel number>:BBM=<BBM index>:<alarm unit address 2>;
ZQWA:CH=<service channel number>:DMR=<DMR index>:<alarm unit address 3>;
ZQWA:CH=<service channel number>:SSS=<SSS index>:<alarm unit address 4>;
ZQWA:CH=<service channel number>:TRE=<TRE index>:<alarm unit address 5>;
Addresses have to be set locally to the equipment with a hand-held service terminal.
3 Change the state of the service channel (QWS). ZQWS:<service channel number>:AL;
8 Creating the Abis interface
For an overview, see Overview of BSS integration.In this phase, the ET is connected to the Abis interface to connect the base stations to the BSC (see the figure below).
Figure 21 Abis interface
Steps
1 Check that the ET is connected (WUP).
The ET must be connected before it can be used. For how to check if the ET is already connected, see Connecting the A interface ET.
Check that the ET is connected with the WUP command.
2 To implement this step, choose one of the following alternatives:
a If ET is already connected
Then
Check that the ET is in WO state and restart the ET (USU).
The state of the ET can be changed with command USC.
The ET must be restarted to ensure that the correct ET software is loaded into the unit.
ZUSU:ET,<pcm_index>,C=TOT; b If ET is not connected
Then
Connect the ET (WUC).
ZWUC:ET,<ET index>:<plug-in unit type>,0:IF=ABIS:BCSU,<BSCU index>;
BTS
BSC
ET TRU Abis interface O M U TRX 1 TRX 2 TRX 3 OMUSIG TRXSIG1 + 8 TCHs TRXSIG2 + 8 TCHs TRXSIG3 + 8 TCHs*RoHS compliant ET2A-TB, ET2E-TB and ET2E-TCB units are created to the equip- ment database as ET2A-T , ET2E-T and ET2E-TC.
Steps
a Change the state of the BCSU to WO-EX. b Change the state of the ET to WO-EX.
3 Check and change the frame alignment mode (ETSI)/T1 functional mode (ANSI) for ET if needed.
For more information about configuring the frame alignment mode/T1 functional mode, see Connecting the A interface ET.