Alcatel 1850 TSS-320 Technical Handbook page 98

Path processing So
Provides path termination functionalities for the particular transport technology.
For detailed description refer to the following:
Sonet/SDH HO (VC-4/3)
Sn_TT_So
see section 3.4.2.1 on page 79
Packet demapper
Virtual concatenated group termination with LCAS management for SDH. For HO SDH traffic, also
standard contiguous concatenation (i.e. AU4-4c and AU4-16c - AU4-64c)will be supported.
Each card will be able to manage Virtual Concatenated Groups, for SDH, with the characteristics
described below:
Extraction of GFP/LAPS/HDLC (frames from the specific transport technology (SDH).
Depending on the transported packet traffic different functionalities are provided:
ETH based traffic
GFP/LAPS frames termination
detection of CFS (for GFP only)
FCS check (GFP/LAPS only)
Packet discarding in case of FCS error
metering (GFP/LAPS frames)
ETH decapsulation from GFP/LAPS frames
MAC validity check
Metering on port base
Support of Ethernet over Cisco proprietary
HDLC in transparent way
Packet mapper
Virtual concatenated group generation with LCAS management for SDH based traffic.
For HO SDH traffic, also standard contiguous concatenation (i.e. AU4-4c and AU4-16c - AU4-64c)
will be supported. VCG management characteristics as defined in demapper functionality.
Mapping of GFP/LAPS/HDLC frames into the specific transport technology (SDH).
Depending on the transported packet traffic different functionalities are provided:
Alcatel 1850 TSS-320 Rel. 1.1
96/270 8DG 07734 AAAA Edition 01
Sonet/SDH LO (VC3/12/11)
Sm_TT_So
LO path termination is provided by LOA
card as described in section 3.4.4.2 on
page 87: data card provides a simplified VC
Max number of
VCG per card
HO 64
LO 128
VC12/VC3
Max number of VC
in a VCG
64
t.b.d.
MPLS/IP based traffic
GFP/Cisco proprietary HDLC/ standard PPP
HDLC (LAPS tbc) frames termination
traffic and payload type decapsulation from
GFP/ Cisco proprietary HDLC/ standard PPP
HDLC frames (LAPS tbc)
FCS check (n.b. for GFP the check is manda-
tory)
metering (GFP/LAPS/HDLC frames)
Technical Handbook Common
Functional Description