Cisco MGX 2 x T3/E3 Frame Service Modules

Cisco MGX 2 x T3/E3 Frame Service Modules
DATA SHEET
Cisco MGX 2 x T3/E3 Frame Service Modules
T HE C ISCO FRSM-2T3E3 AND FRSM-2CT3 F RAME S ERVICE M ODULES (FRSM S ) ARE DESIGNED FOR
USE WITH THE
MGX 8230 AND MGX 8250 MULTISERVICE GATEWAYS , THE MGX ™ 8800 SERIES
WIDE - AREA EDGE SWITCH AND THE
BPX ® 8680 UNIVERSAL SERVICE NODE . T HE FRSM-2T3E3 AND
FRSM-2CT3 FRAME SERVICE MODULES OFFER HIGH - SPEED T3/E3 AND HIGH - DENSITY N X DS0/DS1
FRAME SERVICE INTERFACES FOR THE NEW WORLD OF DATA NETWORKING .
Demand for high-density aggregation of branch traffic
Ordering Information
for global enterprises, high-capacity corporate backbones,
high-speed access to the global Internet, and service provider
MGX-FRSM-2T3E3(=)
Two clear-channel/subrate T3 or E3 frame
service modules
MGX-FRSM-2CT3(=)
Two channelized T3 frame service modules,
providing n x DS0 and DS1 ports
MGX-BNC-2T3(=)
Two T3 75-ohm BNC back cards for FRSM-2T3E3
or FRSM-2CT3
MGX-BNC-2E3(=)
Two E3 75-ohm BNC back cards for FRSM-2T3E3
AX-FS-HS (=)
Optional SW license for support of ForeSight and
QoS traffic management
internetworking has led to growth in Frame Relay service
offerings, and the demand for higher-capacity frame
interfaces.
The FRSM-2T3E3 provides two ports of high-speed
T3 or E3 frame services on a single, seven-inch function
module, while the FRSM-2CT3 provides two channelized
T3 interfaces on a single, seven-inch function module
for high-density n x DS0 and DS1 frame services.
The FRSM-2T3E3 provides direct connectivity to
two full-duplex T3 or E3 lines. In addition to clear channel
support, to support the widest range of operational
environments, the FRSM-2T3E3 supports proprietary
subrate and scrambling features of the T3/E3 DSU vendors
Digital Link and ADC Kentrox. Subrate support in the
FRSM-2T3E3 maximizes the application of these products in
service provider environments for tiered DS3 services. Using
the FRSM-2T3E3, up to 48 T3 or E3 ports can be operated
simultaneously on the MGX 8800 wide-area edge switch
platform, and up to 768 T3 or E3 ports can be operated
simultaneously on the BPX 8680 universal service node.
The FRSM-2CT3 provides direct connectivity to two
full-duplex T3 lines. Each T3 line provides channelized
operation to support n x DS0 and DS1 service ports. Using
the FRSM-2CT3, up to 1344 DS1 ports or channelized
DS1s can be operated simultaneously on the MGX 8800
wide-area edge switch platform.
Highlights
FRSM cards support multiple HDLC-derivative frame
service interfaces, which can be configured on a per-port
basis. These service interfaces include the Frame Relay UNI,
Frame Relay NNI, ATM FUNI, and frame forwarding—
HDLC transparent, providing “channel extension” support
for legacy HDLC-based protocols such as Point-to-Point
Protocol (PPP).
Traffic is mapped between these service interfaces and
the ATM backplane using standards-compliant adaptation.
Consistent with Cisco’s intelligent quality-of-service (QoS)
management features, T3/E3 FRSM cards support per-VC
queuing on ingress and multiple class-of-service (CoS) queues
on egress.
T3/E3 FRSM cards can be Y-cabled to provide 1:1
hot-standby redundancy of the FRSM.
Frame Relay-to-ATM network interworking and
Frame Relay-to-ATM service interworking are both
supported on a per-PVC basis.
• 1:1 redundancy with Y-cabling for T3 FRSM cards of
the same type
• LOS, OOF, AIS, RAI, FEBE alarm detection/generation
support
E3 Interfaces
• Two G.703 (34.368 Mbps +/–20 ppm) interfaces with
dual female 75-ohm BNC coaxial connectors per port
(separate RX and TX)
• HDB3 line coding
• Pulse shape conforming to ITU G.703
• ITU G.751 line framing format
• Scrambling and subrate (FRSM-2T3E3) support of
major DSU vendors
• E3 BERT and extended loopback pattern generation/
verification
• 1:1 redundancy with Y-cabling for T3 FRSM cards
of the same type
• LOS, OOF, AIS, RAI, FEBE alarm detection/generation
support
FRSM cards are supported by standards-based
management tools, including SNMP, TFTP (for
Data-Link Layer
configuration/statistics collection), and a command-line
All Port Types
interface. Cisco’s WAN Manager and CiscoView tools also
• 7E flags used to delineate frames (with bit stuffing to
provide full graphical user interface support for connection
and equipment management.
With these feature options, customers can independently
use either frame- or cell-based interfaces at each site,
prevent false flags) and for interframe gaps
• One flag between frames is considered valid upon receipt
• Supports configuration of one- or two-flag minimum
interframe gap for transmission
with independent selection of encapsulation techniques,
• Valid frame sizes are 5 to 4510 octets
such as IETF RFC 1490 or 1483, and ensure that the
• Supports up to 2000 (FRSM-2T3E3) or 4000
sites communicate.
Features
Physical Layer
(FRSM-2CT3) virtual connections per card
• Each logical port on an FRSM independently configurable
to run Frame Relay UNI, Frame Relay NNI, ATM FUNI,
or frame forwarding
T3 Interfaces
Frame Relay
• Two DSX-3 (44.736 Mbps +/–20 ppm) interfaces with
• Each logical port is independently configurable as
dual female 75-ohm BNC coaxial connectors per port
(separate RX and TX)
• B3ZS line coding
• Pulse shape conforming to ANSI T1.102.1993
• C-bit parity and M13 line framing formats
• Scrambling and subrate (FRSM-2T3E3) support
of major DSU vendors
• T3 bit error rate tester (BERT) and extended loopback
pattern generation/verification
Frame Relay UNI or Frame Relay NNI
• Meets ANSI T1.618, using two-octet headers
• Interpreted CCITT-16 CRC at end of the frame
(frame discard if in error)
• Supports ITU-T Q.933 Annex A, ANSI T1.617 Annex D,
and LMI local management for semipermanent virtual
circuits (both UNI and NNI portions); enhanced LMI
provides autoconfiguration of traffic-management
parameters for attached Cisco routers
• Frame Relay-to-ATM network interworking (FRF.5)
• A single set of Frame Relay traffic access parameters
and Frame Relay-to-ATM service interworking (FRF.8),
(for example, CIR) is configured for the logical port in
both transparent and translation modes, configured on
frame-forwarding mode; all arriving frames are treated
a per-permanent virtual circuit (PVC) basis
as if they arrived without a set DE bit; if the frame is
®
• Ability to extend ForeSight license technology between
two Cisco networks across FR-UNI or FR-NNI using ANSI
determined to exceed the committed rate (exceeding CIR),
the CLP of all cells associated with that frame is set to
• T1.618 consolidated link-layer messages (CLLM)
indicate low priority; if the frame exceeds the total rate
• Standards-based CIR policing and DE tagging/discarding
allowed for committed and uncommitted traffic, the frame
• Support for high-priority, rt-VBR, nrt-VBR, VBR, and
ABR-ForeSight QoS
is discarded
• Support for high priority, rt-VBR, nrt-VBR, VBR, and
ABR-ForeSight QoS
ATM FUNI
• ATM Forum FUNI mode 1A supported
General Card Information
• Interpreted CCITT-16 CRC at end of the frame
Indicators
(frame discard if in error)
• AAL5 mapping of user payload to ATM
• Supports 16 VPI values (15 plus the zero VPI); supports
virtual path connections (VPCs) for all nonzero VPI values
(up to 15 VPCs)
• Per card: Active (green), standby (yellow), fail (red)
• Per line: Active and OK (green), active and local alarm
(red), active and remote alarm (yellow)
Maintenance/Serviceability Features
• Supports 64 VCI values
• Internal problem isolation loopbacks
• Supports OAM frame/cell flows
• Hot-pluggable
• Standards-based usage parameter control
• Support for high priority, rt-VBR, nrt-VBR, VBR, and
Reliability
• > 100,000 hours MTBF
ABR-ForeSight QoS
Card Size
Frame Forwarding
• Front cards: 7.25 x 15.83 in.
• No assumptions made on the frame header format
• Back cards: 7.0 x 4.125 in.
• Interpreted CCITT-16 CRC at end of the frame (with frame
Power
dropping on an error)
• If a connection is set up, all frames are routed to/from
that connection; otherwise the frame is discarded
• FRSM-2CT3= –48 VDC, 49.20W
• FRSM-2T3/E3= –48VDC, 45.25W
• No translation/mapping attempted between frame header
bits and ATM layer EFCI and DE bits
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