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Installation and Operation Manual
Chapter
1 Introduction
ACE-3105, ACE-3205 Ver. 5.2
Functional Description
1-17
Figure
1-13. NTR Clock Recovery
NTR clock recovery is supported over SHDSL only. NTR has higher frequency
accuracy than adaptive clock recovery.
TDM over ATM Functionality
ACE-3105, ACE-3205 allows certain types of CBR or circuit traffic to be carried
over ATM or packet-switched networks. As ATM is essentially a packet oriented
transmission technology and not a circuit oriented transmission technology,
ACE-3105, ACE-3205 emulates circuit characteristics over ATM in order to offer
the required service for CBR traffic.
In ACE-3105, ACE-3205, the following CES modes are supported:
•
Adaptation Layer 1 (AAL1), complies with ITU-T I.363.1
•
CES CBR service, according to ATM Forum AF-VTOA-0078 (CES 2.0)
•
Unstructured CES, according to AF-VTOA-0078. Unstructured CES supports
only one CES connection per E1/T1 port
•
Configurable CDVT buffer in range of 1–32 milliseconds
•
AAL1 reassembly implementing Fast SN algorithm as specified in ITU-T I.363.1
•
Dummy cell insertion with conditioning pattern for lost cells or at under-run
events
•
No partially filled cells
•
CES clock is derived from the ATM network (no SRTS or adaptive mode).
•
CES over packet-switched networks.
ATM Switching/Aggregation Functionality
This section describes:
•
•
Note
Содержание ACE-3105
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Страница 352: ...Chapter 6 Monitoring and Diagnostics Installation and Operation Manual 6 114 Technical Support ACE 3105 ACE 3205 Ver 5 2...
Страница 380: ...Appendix D Clock Modes Installation and Operation Manual D 8 DSL and PSN Timing Modes ACE 3105 ACE 3205 Ver 5 2...
Страница 396: ...Appendix E Encapsulation over PSN Installation and Operation Manual E 16 5BClock Encapsulation ACE 3105 ACE 3205 Ver 5 2...
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