Paradyne 8995, Инструкция по установке и эксплуатации, Страница: 5 / 24

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T1 and E1 Line Cards Description
The Models 8995 and 8997 line cards can be used in any 8620 or
8820 Broadband Loop Carrier (BLC) managed by a Shelf
Concentration and Processing (SCP) card.
Physical Description
Each 8995 or 8997 access line card connects through one
50-position Telco connector (RJ48M) on the rear of the chassis. Each
supports:
„
Short haul and long haul configurations
„
Surge protection for standards compliance
„
Local and remote loopback testing functions
„
Selectable test patterns
„
Loopbacks and statistics
Each 8995 T1 line card supports:
„
ESF framing
„
B8ZS line code
Each 8997 E1 line card supports:
„
G.703 framing
„
HDB3 line code
„
75 Ohm or 120 Ohm operation
ATM Features
ATM features include support for:
„
Four service categories:
— Constant Bit Rate (CBR)
— Real-Time Variable Bit Rate (rt-VBR)
— Non-Real-Time Variable Bit Rate (nrt-VBR)
— Unspecified Bit Rate (UBR)
„
24 virtual circuits (VCs) per port
„
Virtual Path (VP) switching
„
Traffic shaping by virtual circuit (VC) or logical port
04-17498
T1
8995
SYSTEM
OK
Alrm
Test
TX
RX
LOC
1
2
3
4
ATM B
US
T1 POR
T
5
6
7
8
POR
T
POR
T
04-17499
E1
8997
SYSTEM
OK
Alrm
Test
TX
RX
LOC
1
2
3
4
ATM B
US
E1 POR
T
5
6
7
8
POR
T
POR
T