Cisco IGX 8 Manuale utente

APPENDIX

-1

System Specifications

This appendix contains system speciﬁcations.

General This section provides general system information on the IGX 8.

System Capacity: 1 shelf with 8 card slots.

Requires 2 dedicated front slot(s) for NPMs.

Requires 2 dedicated back slots for SCMs (1 slot with blank plate).

Up to 6 T1/E1 circuit ports.

Up to 6 T1/E1 packet trunks.

Up to 48 synchronous data ports.

Up to 25 Voice, Data, and/or Frame Relay Module groups.

Enclosure Size: IGX 8 Standalone/Rackmount:

Height: 25 ins. (63.5 cm) standalone; 24.5 ins. (62.3 cm), rack

Width: 19.9 ins. (50.5 cm), standalone; 19 ins. (48.3 cm.), rack

Depth: 26.5 ins. (67.3 cm), standalone and rack-mount

Shipping Weight: 270 pounds (122.7 kilograms)

Clearance Requirement: Min. clearance: 30 inches front; nominal 30 ins. rear; 12 ins. side.

Power Input Voltage: AC system: 100 to 240 VAC (90–264 under-voltage and

over-voltage tolerance), 47 to 63 Hz.

DC system: –42 to –56 VDC.

Each AC supply can provide up to 400 watts to the card shelves.

Space for 4 power supplies.

Current Requirements: Conﬁguration dependent - use Network Design Tool for exact

requirements. For planning purposes, use the following:

• AC System 10 Amps Max. for 110 VAC, 5 A for 220 VAC.

• DC System 20 Amps max. at –48 VDC; 25 Amps at –42 VDC (worst case)

-2 IGX 8 Installation Manual, Release 8.2.0

Voice Circuit Support

Input AC Power

Connector: IEC 16 Amp input connector. 6 different power cords are available

to comply with the standards of individual countries. Power cords

are 6 feet (about 2 meters) long. See AC Power Cabling for details.

DC Input Connections 3-wire pluggable terminal block with screw terminal connectors.

Operating Environment: 0°to 50°C (32°to 104°F). Maximum 85% relative humidity

Shock: Withstands 10 G, 10 ms. at 1/2 sine wave.

Vibration: Withstands 1/4 G, 20–500 Hz.

Heat Transfer to Room: IGX 8: 2720 BTUs max.

Voice Channel Interface: 24-channel T1 (D4 format).

24-channel T1-ESF (using CVM8).

30-channel framed CEPT E1.

31-channel framed CEPT E1.

Voice Compression

Available: 32/24/16 Kbps ADPCM.

32 Kbps ADPCM.

Voice Activity Detection compression.

Compression Algorithm: ITU-T G.721, G.723, G.726.

StrataCom 32 Kbps ADPCM.

PCM Encoding Types: Accommodates µ-Law or A-Law encoding,

End-to-end conversion available.

Channel Gain Control: –8 dB to +6 dB.

Signalling Modes: T1: Robbed bit or CCS (ISDN).

E1: Channel Associative Signalling (CAS) or Common Channel

Signalling (CCS).

Signalling Conditioning: Various make-busy and forced idle routines during circuit alarm can

be speciﬁed on a per-channel basis.

Quantizing Distortion

Added: 2.5 Quantizing Distortion Units (QDU)s with 32 Kbps ADPCM

over 1 hop plus 0.7 QDUs with Digital Loss PAD (µ-law or A-Law).

-3

Data Channel Support

Sync. Data Interfaces: RS-232C/D, RS-449/422, V.24, X.21, and V.35

with IGX 8 as DCE or DTE.

High-Speed Data Rates

(HDM): 2.4 Kbps to 1.344 Mbps.

Low-Speed Data Rates: 2.4 to 19.2 Kbps per LDM port.

Ports per card: LDI: 4 or 8.

SDI: 4.

Control Leads Supported: SDI: Per interface standards.

SDI: Up to 7 in each direction for fast EIA.

LDI: 3 in each direction for DCE and DTE for each port.

Control Lead Sync

w/Data: Control leads are sampled every 50 ms. and changes will normally

follow data within 100 to 1000 msec. Fast EIA lead will be within 1

byte.

DS0A Interface: Superrate, 56 Kbps to 512 Kbps (8 DS0s) per port.

Subrate: One 2.4/4.8/9.6/19.2/ or 56 Kbps per DS0

Per Bell TR-TSY-000458, TR-TSY-000280, TR-TSY-000083, and

TR-TSY-000077.

Data Clocking: Synchronous and isochronous clocking.

Normal, looped, and split clock conﬁgurations.

Pleisochronous

Clock Range: ±2 percent of nominal data rate.

-4 IGX 8 Installation Manual, Release 8.2.0

Digital Data Service Interface

Ports per card: Four.

Electrical Interface: Digital Data System (DDS)—AT&T Pub. 62310, November 1987.

Interface Type: DSU or OCU (software selectable).

Data Rates: 2.4, 4.8, 9.6, 19.2, and 56 Kbps (software selectable).

DDS Data Encoding: Standard DDS Bipolar Return to Zero. Alternate Mark Inversion

coding with bipolar violation sequences for zero suppression and

control.

Data Compression: Repetitive Pattern Suppression (RPS): 7, 8, or 16 bit pattern

matching.

Synchronization Modes: External (DSU only)

Looped (OCU only).

Control Codes Recognized: Idle.

Zero Suppression.

Out-of Service.

Loopback Sequences.

Control Code Translation: Translation of RTS to IDLE.

Alarm Code Translation: Translation of the logical NOR of Out-of-Service

Sync Fail.

Excessive Bipolar Violations.

No Signal to DSR (DSU only).

No Signal to DTR (OCU only).

Connector: ISO 4903, female DB-15 type connector.

-5

T1 Interface

Line Rate: 1.544 Mbps, ±50 bps (±200 bps VCO lock range).

Line Code: Bipolar AMI or B8ZS.

Framing Formats: Fractional T1, adjacent or alternating channels.

Minimum of four DS0 channels required.

Signal Level: DSX-1 compatible.

Line Impedance: Terminated = 100 Ohms nominal. Bridged = 1 KOhm.

Pulse Amplitude Individual pulse amplitude 2.4 V–3.6 V (making a total

base-to-peak amplitude of 6 V ±.6V)

Minimum Pulse Density: Zero code suppression, either LSB or MSB.

Frame Format: D4 and Extended Superframe (ESF).

VF Signalling: Robbed bit D4 with A and B bits.

Max. Line Lengths: Up to 533 feet with equalizers using ABAM cable.

Jitter Transfer: Meets AT&T PUB 62411 speciﬁcations.

Jitter Tolerance: Meets ANSI standards and AT&T PUB 62411 specs.

Connector: DB 15 female.

-6 IGX 8 Installation Manual, Release 8.2.0

E1 Interface

Line Rate: 2.048 Mbps, ±50 bps (±200 bps VCO lock range)

Line Code: Bipolar AMI or HDB3

Line Impedance: 120 Ohms (balanced) or 75 Ohms (balanced or unbalanced)

Minimum Pulse Density: Zero code suppression via HDB3 coding

Frame Format: Unframed, 32-channel (G.703). Framed: 30 or 31-channel CEPT

multiframe per ITU-T G.704.

VF Signalling: CAS or CCS

Max. Line Lengths: E1 output complies with G.703, so cabling must not exceed

–6dB/1000 feet at 1024 kHz (applies to 75 Ohm coax or 120 Ohm

twisted pair up to 350 meters or 1000 feet). StrataCom supplies

cable with a maximum attenuation of 7 dB /1000 ft., so the

maximum length of this cable is 850 feet (260 meters).

Jitter: Meets G.823.

Electrical Interface: Complies with G.703 Speciﬁcation.

Connector: DB 15 female or BNC.

-7

T3 Interface

Line Rate: 44.736 Mbps ±20 ppm, asynchronous.

Line Code: B3ZS.

Clock Source Mode: Internal (Asynchronous).

Signal Level: DSX-3.

Framing Formats: M13 mode, C-bit parity.

Alarms Processed: AIS.

LOS.

Remote Alarm Indication.

Loss Of Framing.

Line Errors Counted: BPV.

Parity Bit Errors.

Receiver Input Impedance: Terminated = 75 ohms.

Transmission Modes: Point-to-Point or Drop and Insert.

Jitter: Meets ACCUNET T45 speciﬁcation (Pub 54014).

Connector: 75 ohm BNC.

Max. Line Lengths: 450 ft. (137 m.) to DSX-3 using 75 Ohm coaxial cable.

Indicators: RED Alarm.

YELLOW Alarm.

LOS.

AIS.

-8 IGX 8 Installation Manual, Release 8.2.0

E3 Interface

Line Rate: 34.368 Mbps ±20 ppm, asynchronous.

Line Code: HDB3.

Clock Source Mode: Internal (Asynchronous).

Signal Level: ITU-T G.703

Framing Formats: ITU-T G.804, G.832,

Alarms Processed: AIS.

LOS.

Remote Alarm Indication.

Loss Of Framing.

Line Errors Counted: BPV.

Parity Bit Errors.

Receiver Input Impedance: 75 ohms unbalanced.

Transmission Modes: Point-to-Point or Drop and Insert.

Jitter: per ITU-T G.823.

Connector: 75 ohm BNC.

Max. Line Lengths: 137 meters (450 ft.) using speciﬁed cable.

Indicators: RED Alarm.

YELLOW Alarm.

LOS.

AIS.

-9

Frame Relay Interface

Type of Service: Permanent Virtual Circuit (PVC).

Data Interface: Per ITU-T I.122 and ANSI T1/S1 Standards.

Data Transfer Protocol: LAP-D frame level core functions.

Input Data Format: High Level Data Link (HDLC) protocol.

Input Data Frame Length: Up to 4096 bytes max.

Frame Integrity Check: Frame Check Sequence and CRC check of data frame. If CRC fails,

data frame is discarded at receiving node.

Input Data Rate: 56 Kbps to 2.048 Mbps. (Max. rate available only with one of four

ports/card active).

No. of Ports per Card: 4

No. of PVCs per Port: 252 per FR card, distributed in any combination.

Port Electrical Interface: ITU-T V.35. IGX 8 can act as a DCE or DTE for direction of control

leads and timing.

Data Clocking: Normal or looped.

Virtual Circuit Identiﬁer: Data Link Connection Identiﬁer (DLCI).

Control Protocol: Local Management Interface with XON/XOFF type ﬂow control.

IGX sets FECN and BECN bits in frame relay frame.

Bundled Connections: 252 virtual circuits per card

1024 virtual circuits per node.

Billing Time Accuracy: Upon request from user device, IGX will provide GMT from any

node accurate to within 1 second.

-10 IGX 8 Installation Manual, Release 8.2.0

ATM Interface

Network Synchronization

Type of Service: Permanent Virtual Circuit (PVC)

Interface Types: User-to-Network (UNI) and Network-to-Network (NNI) per ITU

I.361 and I.363

Data Rates: T3 or E3

ATM Layer: Physical Layer Convergence Protocol per AT&T publication

TA-TSY-00772 and 000773 for T3; ITU I-361 with HEC for E3

Cell Rate: 96,000 cells/sec. for T3, 80,000 cells/sec. for E3

Adaptation Layer: AAL5

No. of Ports per card: 4

No. of PVCs per card: 255

VPI Addressing Range: 0–255

VCI Addressing Range: 0–65535

Trafﬁc Queues: CBR, VBR, and ABR

Management Protocol: Interim Layer Management Interface (ILMI)

External Clock Sources: The IGX switch synchronizes to the nearest, highest-stratm clock available.

Any T1, E1, T3, E3, OC3 (STM-1) line, trunk, or optional external clock

inputs can serve a clock source.

Internal to Node Source: T1: 1.544 MHz, ±10 ppm (stratm 4)

E1: 2.048 MHz, ±10 ppm (stratm 4)

Clocking Hierarchy: Dynamic primary, secondary, and tertiary clocking

Without a deﬁned external clock reference, the IGX defaults to its internal

clock source.

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