Ecc And Oh Architecture; Intra-Shelf Ecc Architecture; Figure 86. Ecc Intra-Shelf Architecture - Alcatel 1850 TSS-320 Technical Handbook

3.8 ECC and OH architecture

3.8.1 Intra-shelf ECC architecture

The internal architecture handling the Embedded Channel Communication (ECC) is depicted in Figure
86. on page 140.
To/from
Service
The purpose of this architecture is to support the termination and the routing of the different types of ECC's
associated to the services supported by the equipment: specifically, different 'control planes' belonging
to different services may be handled by the same ECC router.
– The ECC's are dropped/inserted by the port associated to the specific service:
• in SDH, WDM, ports, a specific 'TDM framer' block is implemented, in order to realize the
adaptation of terminated logical channels to the internal ECC Frame format;
• in Ethernet ports, the adaptation of control packets is handled by a 'Packet Processor' block and
by a local micro-processor, connected to the ECC router through the I-LAN.
– The physical communication between each SDH (or WDM) port and First level controller is based
on a TDM full duplex link able to operate up to 19.44 Mb/s bit-rate as a 'point-to-point' serial link. This
link is duplicated from each slot of the equipment to both FLC copy A and FLC copy B.
A dedicated link (max. 19.44 Mb/s bit-rate) is supported in order to allow ECC connectivity between First
level controller and Service board.
The physical communication between each Ethernet port and First level controller relies on I-LAN able
to operate at 100 Mb/s bit-rate.
The First level controller collects then, totally, 33 TDM links for ECC's internal transport.
– The ECC routing functionality is located on both First level controller boards (boards redundancy
allows to support the EPS 1+1 configuration).
These channels are, then, forwarded by the 'Multi-HDLC Controller' to the internal micro-processor for the
actual routing.
Alcatel 1850 TSS-320 Rel. 1.1
140/270 8DG 07734 AAAA Edition 01
I-LAN @ 100 Mb/s
ECC link – max. 19.44 Mb/s
ECC link – max. 19.44 Mb/s

Figure 86. ECC Intra-Shelf Architecture

(32)
1
Multi
HDLC
Controller
(1)
(Munich256)
16
Equipment Controller A
Technical Handbook Common
μP
PCI
(PQ3)
B
Functional Description