mhs presentation 2-20-08 v2 final

7/31/2019 MHS Presentation 2-20-08 v2 FINAL

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2008 Exalt Communications Inc.All Rights Reserved. www.exaltcom.com

Monitored Hot Standby

(MHS) Solution

Monitored Hot StandbyMonitored Hot Standby

(MHS) Solution(MHS) Solution

EXEX

--i Seriesi Series

February 2008February 2008


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2008 Exalt Communications Inc. All Rights Reserved. www.exaltcom.compage 2

EX-i Series

Monitored Hot Standby Kit

EXEX--i Seriesi Series

Monitored Hot Standby KitMonitored Hot Standby KitDescription

Single fault 1+1 equipment protectionCurrently available for EX-2.4i-16, EX-5i-16 and EX-5i-F

MHS Kit Contents1 RU Exalt MHS Panel4x T1/E1 protection cables

1x synchronization cable (CAT-5)1x secondary AUX management cable (CAT-5)

1x primary management control cable (serial)2x RF cables

MHS Cable Kit Contents4xT1/E1 protection cables for configurations greater than the basemodel 4xT1/E1None needed for EX-5i-F


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Block Level Diagram


Block Level DiagramBlock Level Diagram

Radio ASecondary

Radio APrimary

Radio BSecondary

Radio BPrimary

RFSwitch

RFSwitchT1/E1 T1/E1

Local LAN Local LAN

Sync

Sync

Control

Control

Ethernet

switchor Router

Ethernet

switchor RouterExalt EX-i Series radios

Exalt MHS kit

Customer provided equipment

Customer provided cabling

Note: MHS protectionis not available for V.35ports on the EX-5i-F


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Endpoint Wiring Diagram


Endpoint Wiring DiagramEndpoint Wiring Diagram

RF Switch

T1/E1 protection cable

Note: MHS protectionis not available for V.35ports on the EX-5i-F

Control and synccabling


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Exalt MHS PanelExalt MHS PanelExalt MHS PanelMHS Panel

24 or 48VDC Operation

MHS Panel preconfigured for24VDC operationMHS Panel must be modified priorto installation for 48VDC operation

5 rack spaces totalMount MHS panel in central 1RUPrimary radio mounts below MHSpanel. Occupies 1.5RU.Secondary radio mounts aboveMHS panel. Occupies 1.5RU.Extra 0.5RU airspace above andbelow the system for ventilation

Cut this wire

For 48VDC operation

Secondary Radio

Primary Radio

RF switch


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Exalt MHS Wiring DetailExalt MHS Wiring DetailExalt MHS Wiring DetailT1/E1 cables

All ports connected in parallel via

T1/E1 protection Y cable.

4 cables provided in kit for baseconfiguration. Up to 16xT1/E1 withoptional 4x cable kit accessory.

Female RJ45 connector in protectionY cable allows extension of T1/E1

cabling to existing DSX frame ortermination.

MHS RF Switch Control

9 pin connector cable (part of MHSpanel wire harness) connected tosecondary radio ALARMS port

ALARMS port on secondary radio isunavailable for normal use. ALARMSport of primary radio operatesnormally

Port 1

Port 1

Port 1 interfacesconnected via

protection Y cable

Female RJ45 connectorfor T1/E1 wiring

ALARMS port insecondary radioused for RF switchcontrol


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Exalt MHS Wiring DetailExalt MHS Wiring DetailExalt MHS Wiring DetailPrimary management control

The serial cable connects Console

ports on both primary and secondaryradios

Secondary management controlGray CAT-5 cables connect AUXEthernet ports on both primary andsecondary radios

Used for redundancySynchronization

Yellow CAT-5 cable connects SYNCOUT in primary radio to SYNC in ofsecondary radioPrimary radio SYNC IN may be used

as input from external ExaltSync GPSor collocated EX-i Series radioSYNC OUT of secondary radio maybe used to sync collocated radios

Console portPrimarymanagement control

AUX Ethernet portSecondarymanagement control

Sync portsPrimary: SYNC OUTSecondary: SYNC IN


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MHS Configuration PageMHS Configuration PageMHS Configuration Page

Radios should be configured

prior to physical installationMHS default is Disable

Partner IP Address

Used to identify the primary orsecondary partner for sameendpoint

MHS Designation

Used to identify MHS primaryor secondary role

Physical wiring must beaccording to the assigned

role


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MHS Configuration PageMHS Configuration PageMHS Configuration PageAdditional MHS features

Lock On can force the online or standby

behavior of a primary or secondary radioNormal: normal MHS behavior

Online: force Online status

Standby: force Standby status

Lock On Timeout

Time duration of lock on

20 sec, 10 sec, or infiniteUseful when performing maintenance ortesting protection setup

Should be set to default for normaloperation

Lock On: No lock on (Normal)

Lock On Timeout: 20 seconds


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MHS Status PageMHS Status PageMHS Status PagePartner IP Address

IP address for primary or secondary MHS

partner for same endEntered in MHS Configuration screen

Designation

MHS primary or secondary role

Entered in MHS Configuration screen

Radio StatusIndicates whether a primary or secondaryradio for a particular endpoint is eitheronline or standby

Protection Link Status

Verifies protection links are operating

normally

Configuration status

Validates proper configuration of MHSparameters


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MHS Operation

Normal State

MHS OperationMHS Operation

Normal StateNormal State

OnlineNormalPrimary

StandbyNormalSecondary

StatusConditionRadio A

Radio A

Secondary

Radio A

Primary

Radio B

Secondary

Radio B

Primary

T1/E1 T1/E1

Local LAN Local LAN

Sync

Sync

Control

Control

Ethernetswitch

or Router

Ethernetswitch

or Router

OnlineT1/E1path

Onlinedata path

OnlineNormalPrimary


StatusConditionRadio B

active ports

Linkbeat always on

T1/E1

ports intri-statemode


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MHS Operation

Radio Failure Scenario


Radio Failure ScenarioRadio Failure Scenario

Radio A

Secondary

Radio A

Primary

Radio B

Secondary

Radio B

Primary

T1/E1 T1/E1

Local LAN

Sync

Sync

Control

Control

Ethernetswitch

or Router

Ethernetswitch

or Router

OnlineT1/E1path

Onlinedata

path

T1/E1 and LAN traffic isrouted to secondary RadioA and RF switched within~5 sec*. Only the endpointexperiencing the problemis switched

OfflineCriticalAlarm

Primary

OnlineNormalSecondary


OnlineNormalPrimary



Complete system failuregenerates critical alarm insecondary radio and SW

control initiates switchover

active ports

T1/E1portsout oftri-statemode

Data internally routed to port

* Approximate switching time in first release.

Switch/Router updatesMAC table andforwards packets tosecondary radioEthernet port

Loss of linkbeat


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MHS Operation

Normal State After Switchover


Normal State After SwitchoverNormal State After Switchover

Radio A

Secondary

Radio A

Primary

Radio B

Secondary

Radio B

Primary

T1/E1 T1/E1

Local LAN Local LAN

Sync

Sync

Control

Control

Ethernetswitch

or Router

Ethernetswitch

or Router

OnlineT1/E1

path

Online

datapath

Critical Alarm Clears

StandbyNormalPrimary

OnlineNormalSecondary


OnlineNormalPrimary



T1/E1 and LAN routeis maintained and is notswitched until anothercritical event occurs.*

* It is possible to manually force the T1/E1 and LAN traffic back to the original primary route, butin 1+1 protection this additional switching would create an unnecessary temporary traffic outage.active ports

mhs presentation 2-20-08 v2 final

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