User's Manual

UltraWAVE Micro BTS Installation and Commissioning Guide, Version B 109
Setting the Abis LAPD Signaling Timeslot
4.2 Setting the Abis LAPD Signaling
Timeslot
This procedure sets the Abis LAPD timeslot between the MSC and each Micro
BTS. If the Abis timeslot is not set, it automatically defaults to 16.
This procedure is optional for a star configured Micro BTS, but is required for all
BTSs which will be used in a daisy chain. In this case, each Micro 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 Micro BTS over a serial line, and
that a serial connection is established. Refer to Chapter 3 - Off-Line
Commissioning 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:
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.
This procedure must be performed after the Micro BTS is tested
using a Racal test set. Refer to the GSM Field Maintenance Guide
for further instructions.
The Abis signaling timeslot for each Micro BTS in the daisy chain
must be set to a different number. For example:
• Micro BTS 1 in the chain = Set timeslot 16 as the Abis timeslot
• Micro BTS 2 in the chain = Set timeslot 17 as the Abis timeslot
• Micro BTS 3 in the chain = Set timeslot 18 as the Abis timeslot
• Micro BTS 4 in the chain = Set timeslot 19 as the Abis timeslot
Make sure that this information is communicated to the OMC
operator.