User's Manual

70 UltraWAVE BTS Installation and Commissioning Guide, Release 6.5A
4-2 Setting the Abis LAPD Signaling Timeslot
This procedure sets the Abis LAPD timeslot between the MSC and each BTS. If the Abis timeslot is not
set, it automatically defaults to 16.
This procedure is optional for a star configured BTS, but is required for all BTSs which will be used in a
daisy chain. In this case, each BTS must have its Abis timeslot set to a unique number in the chain. This
information will be used by the OMC operator to configure the daisy chain.
1 Ensure that the Craft PC is connected to the BTS over a serial line, and that a serial
connection is established. Refer to Chapter Three for instructions on how to do this.
2 In an Xterm window, type:
bts-> getFlashE1Chan [ENTER]
This displays the timeslot reserved for the Abis LAPD signalling timeslot, which is by default
set to 16. To change this value, type at the prompt:
bts-> setFlashE1Chan <number> [ENTER]
where <number> is the Abis LAPD signaling timeslot assigned to an unassigned T1 channel
between 1 and 24 or to an unassigned E1 channel between 1 and 31.
3 To double-check that the timeslot was changed, type again:
bts-> getFlashE1Chan [ENTER]
The new Abis signaling timeslot number should be displayed.
4 If the Abis signaling timeslot was changed, the BTS must be rebooted. Type:
bts-> reboot [ENTER]
This procedure must be performed after the BTS is tested using a Racal
testset. Refer to the interWAVE Field Maintenance Guide
for further
instructions.
The Abis signaling
timeslot for each BTS in the daisy chain must be set
to a different number. For example:
• BTS 1 in the chain = Set timeslot 16 as the Abis timeslot
• BTS 2 in the chain = Set timeslot 17 as the Abis timeslot
• BTS 3 in the chain = Set timeslot 18 as the Abis timeslot
• BTS 4 in the chain = Set timeslot 19 as the Abis timeslot
Make sure that this information is communicated to the OMC operator.