PSB50505EV13GXT Lantiq, PSB50505EV13GXT Datasheet - Page 87

• Manufacturer Part Number: PSB50505EV13GXT
• Manufacturer: Lantiq

Specifications of PSB50505EV13GXT

• Lead Free Status / RoHS Status: Supplier Unconfirmed

programmed with one Reference Slot at RAM slot 0. This slot number is used to identify
the channel (“channel_nr” = 0).
4.11.2.2 Structured CES
For AAL ports with structured CES (Nx64 kbit/s) service, the timeslots are grouped into
channels containing N of 32 timeslots. The mapping of the N x 64 kbit/s channels into an
T1/E1 frame is done by programming the 32 positions of the internal configuration RAMs
(RAM1 for receive ports, RAM2 and RAM3 for transmit ports).
It is possible to define more than one channel of N timeslots within one frame. In this
case each channel has its own reference slot, followed by N-1 continuation slots.
Additional unused frame slots that do not belong to any channel should be programmed
as “AAL Idle Slot”.
The timeslot in the group of N timeslots with the lowest frame slot number is called the
reference slot. The corresponding frame slot position in the internal RAM should be
programmed as an “AAL Reference Slot”. The slot number of the AAL Reference Slot is
used to identify the channel (“channel_nr”).
The other frame slot positions of the channel should be programmed as “AAL
Continuation Slots”. The reference slot number, as defined by the “ref_slot_nr” field
entry, is used to identify the channel the continuation slot belongs to. The N timeslots of
a channel do not need to have consecutive frame slot numbers. They can be deliberately
chosen out of the 32 frame slots.
Table 23
0
1
2
3
4
5
6
7
8
9
10
11
12
Data Sheet
Slot number
AAL Idle slot positions for structured CES in AAL mode
E1
AAL Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
87
T1 in FAM
AAL Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Idle
PXB 4219E, PXB 4220E, PXB 4221E
Operational Description
T1 in GIM
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
AAL Ref./Cont./Idle
IWE8, V3.4
2003-01-20