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Card Variants
There are 8 variants based on:
• Primary rate interface (T1 or E1)
• AAL type (AAL1 or AAL1/AAL5)
• System backplane bandwidth
(4 Mb/s or 16 Mb/s)
• EMC compliance
ATM Service Adaptation
• AAL1 and AAL5
• Selectable on a DS0 basis for
channelized user-side interfaces
(e.g., T1/E1)
AAL1 Adaptation and CES
• AAL1 or AAL1/AAL5
• Adapts CBR data and associated
signaling (n*64 kb/s) to AAL1
VCs over an ATM network, in
accordance with AF-SAA-
0032.000 and GR-1113- CORE
•DS0s
¬ Supports up to 84 for T1
interfaces
¬ Supports up to 104 for E1
interfaces
¬ Multiple DS0 CESs can be
transmitted over the same VC
¬ Voice (LGS) and data (V.35)
DS0s with a common desti -
nation can be transmitted
together
• Configurable signaling multi -
frame size: 16 or 24 frames
• Supports voice signaling with
robbed-bit signaling and channel
associated signaling
• Received cell delay variation
tolerance is user defined per VC
• Transmit cell level is user defined
per VC from n to 47, in one byte
increments, where n is the number
of DS0s in the VC
AAL5 Adaptation and
HDLC Services
• AAL1/AAL5
• Transports HDLC-formatted
traffic over an ATM network
• Transparently adapts streams
of HDLC frames into AAL5 VCs
• Interworks and adapts streams
of frame relay HDLC frames into
AAL5 VCs
• Supports up to 3,968 Kb/s of
HDLC-formatted traffic
Interworking Mode
• Supports service interworking
mode (translates frame relay into
ATM, for transmission across an
ATM network to ATM devices)
• Supports network interworking
mode (transports frame relay
across an ATM network to
another frame relay network)
• Compliant with FRF.5 and FRF.8
using AAL5 and non real-time
variable bit rate (nrt-VBR) or
unspecified bit rate (UBR)
Data Link Connections
(DLCs)
• Supports up to 250 DLCs per
stream
• Supports up to 1,024 DLCs per
card
Connection Admission
Control (CAC)
• Static and dynamic
• Based on:
¬ Peak information rate (PIR)
¬ Sustained information rate (SIR)
¬ Minimum information rate (MIR)
ATM Traffic Management
• Configurable service categories
¬ AAL1 VCs
¬CBR
¬ AAL5 VCs
¬ nrt-VBR, with VC traffic
management
¬ nrt-VBR, with virtual path (VP)
traffic management
¬ UBR, with VC traffic
management
¬ UBR, with VP traffic
management
Frame Relay Traffic
Management
• Configurable class of service
parameters
¬ Committed information rate
(CIR)
¬ Committed burst size (Bc)
¬ Excess burst size (Be)
• Configurable congestion
thresholds
¬ Absolute congestion threshold
(ACT)
¬ Severe congestion threshold
(SCT)
¬ Mild congestion threshold (MCT)
• Supports link management
protocols
¬ Local management interface
(LMI): user, network and
network extended
¬ ITU-T Q.933 Annex A: user,
network and bidirectional
¬ ANSI T1.617 Annex D: user,
network and bidirectional
Interfaces
• Single logical ATM interface, user
programmable for up to four T1
or E1 interfaces
• Supports ATM Forum IMA standard
AF-PHY-0086.000
• 4-port T1 interface, user program -
mable for DS1 or DSX-1 operation
• 4-port E1 interface, compliant
with ITU-T G.703, 75 Ω or 120 Ω
• Transmit timing obtained from
node system clock or network
• ATM Forum UNI 3.1
TECHNICAL SUMMARY