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EXHIBIT A
TABLE OF CONTENTS
GENERAL CONDITIONS

DEFINITIONS

INDEPENDENT CONTRACTOR STATUS
STANDARD OF CARE

CITY OF NASHUA REPRESENTATIVE
CHANGES TO SCOPE OF WORK

CITY OF NASHUA COOPERATION

DISCOVERY OF CONFLICTS, ERRORS, OMISSIONS, AMBIGUITIES, OR
DISCREPANCIES

TERMINATION OF CONTRACT

DISPUTE RESOLUTION

NO DAMAGES FOR DELAY

INSURANCE

INDEMNIFICATION

FISCAL CONTINGENCY

COMPENSATION

COMPLIANCE WITH APPLICABLE LAWS
NONDISCRIMINATION

ENDORSEMENT

ASSIGNMENTS, TRANSFER, DELEGATION, OR SUBCONTRACTING
CITY INSPECTION OF CONTRACT MATERIALS
DISPOSITION OF CONTRACT MATERIALS

PUBLIC RECORDS LAW, COPYRIGHTS, AND PATENTS
FINAL ACCEPTANCE

TAXES

NON-WAIVER OF TERMS AND CONDITIONS

RIGHTS AND REMEDIES

PROHIBITED INTERESTS

THIRD PARTY INTERESTS AND LIABILITIES
SURVIVAL OF RIGHTS AND OBLIGATIONS
SEVERABILITY

MODIFICATION OF CONTRACT AND ENTIRE AGREEMENT
CHOICE OF LAW AND VENUE

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* — Enable inbound audio to be repeated to all radios that use the same base station.

* Control events, such as a wireline test, from starting on the other station when a main/alt switchover
occurs.

* Send commands through a tone sequence to reach locations inaccessible by phone lines.

@ — Eliminate echo at the console.

* — Identify conventional resources through Unit ID and meaningful alias names.

* Send paging tones on conventional channels without an external paging encoder.

2 Mark that a conventional channel is involved in a high-priority situation.

* Create communication patchgroups of different system resources.

1.6 TARGETING YOUR COMMUNICATIONS

Utilizing ASTRO 25 Conventional Talkgroups enables a separation of voice communications between multiple
agencies sharing an RF conventional channel.

° Radio Users — Communicate with multiple users and/or agencies privately on a single RF conventional
channel.

* Dispatch Operators — Benefit from a more accurate view of what is happening on the channel for which
they are responsible. Receive and transmit only to their associated user groups (or agencies), enabling
dispatchers to clear their own emergencies without interfering with other +r talkgroups.

Radio users and dispatchers using the same talkgroup can
communicate with each other, while users of other talkgroups on the
same channel cannot hear them.

Voice Selective Call allows you to make a radic call to a specific individual on a digital conventional channel without
involving other members of the user group. The signal from a Voice Selective Call contains a user ID code and only
that user radio un-mutes when the call is received.

Note: Voice Selective Calls are not private calls.

Although only the single user radio un-mutes, other users can listen to the conversation by pressing the monitor
button on their radios, just as they can to hear the conversations of other talkgroups using their channel and
frequency, or through configuration of their squelch mode. The call uses a special type of Push-to-Talk (PTT)
capability initiated only on a transmit-by-transmit basis.

1.7 CONFIGURATING YOUR SYSTEM

The Configuration Manager provides the ASTRO 25 conventional system a single interface to configure consoles,
gateways, subscriber information, channel tables, aliases, and the logging server. The Configuration Manager
maintains data versioning/synchronization and tracks configuration changes through both full and delta downloads
showing progress and history status.

Sometimes the best location for a base station prevents communication by phone lines. In this scenario, the Remote
Access/Remote Transmit Ear and Mouth (E&M) Keying allows a remote console, using either an RF link ora
microwave link, to control the base radio.

Main/Alternate Channel Pairing provides an alternative station interface for a conventional channel. The console
shows one logical control window for the channel, but physically includes a main and an alternative interface.

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Note: This channel pairing provides an alternate interface in case of a failure.

Additionally, Main/Alternate Channel Pairing provides the ability to have a main and alternate base station. The
channels comprising the Main/Alternate Channel Pair may be at the same or different RF or console sites.

1.7
1.7.1 Core Site

The Core Site is the central point for all system traffic. Call processing and system management occur at the Core
Site. Centralized management helps you fine tune network performance, minimize costly field visits, and keep the
system running with minimal effort from your administrative staff. The core site includes one or two Conventional Site
Controllers that maintain communication between the consoles, RF Sites, Simulcast Sites and subscriber radios for
voice processing.

Note: Data calls are managed by the Packet Data Gateway (PDG).

The Redundant Configuration offers the added reliability of redundancy. The site controllers, site gateways, core LAN
switches, and backhaul switches are redundant in this configuration, thus eliminating single-point-of-failure outages.
At the Redundant Core, redundant GGM 8000 Site Gateways support only a single-functional role as a site gateway
device,

1.6 NETWORK TRANSPORT SUBSYSTEM

The ASTRO 25 transport subsystem is engineered to meet the performance requirements of a real-time system
transporting voice, call control, network management, and ancillary network services. The Transport Network is a
closed network.

Note: Only Motorola Solutions supplied equipment, applications, and services can be used on the core and site networks.

IP encapsulation across the customer-provided backhaul network transports Radic Network Interface (RNI} traffic.
The Wide Area Network (WAN} Transport can optionally provide encryption, as well as redundant links. In addition,
Quality of Service (QoS) can be used to distribute voice packets to provide a constant and steady delivery of packets
from the source to the destination.

° The Enterprise Ethernet Switch (LAN Switch) — Aggregates all the Ethernet interfaces for all servers,
clients, and gateways.

¢ The Core Gateway — Interfaces to the core LAN, providing layer three routing and protocol conversion
between the core IP devices and the remote site IP devices.

° The Site Gateway — Interfaces to the remote site LAN via one Ethernet connection, and provides Layer
three routing and protocol conversion between the remote site IP devices and the core site IP devices.

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1.8.0.1 GCP 8000 Conventional Site Controller
The GCP 8000 Site Controller provides
mission-critical call processing and
mobility management throughout the
ASTRO 25 Conventional System. The
GCP 8000 interfaces through the
Ethernet LAN switch, providing access
to the packet switched network
through the Core Gateway. Equipped
with a single controller module, the
GCP 8000 can support the full set of dispatch consoles, archiving interface servers, and conventional gateways.

1.8.0.2 GG 3000 Gateway

The GGM 8000 core gateways provide routing control of audio, data, and network management traffic for devices
that forward packets beyond their local LAN. The gateways replicate packets while achieving the fast access levels
required by real-time voice systems.

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GGM 8000 Gateway — Provides routing control of audio, data, and network management traffic for
devices that forward packets beyond their local LAN.

Note: Redundant gateways have been provided in the proposed system design.

1.8.0.3 Enhanced GGM 8000 Conventional Channel Gateway

Enhanced Conventional Channel Gateways (ECCGWs) connect dispatch operators to analog or digital conventional
channels in the system. Up to 16 conventional channels can be connected to the eight analog and eight V.24 ports on
a GGM 8000-hased ECCGW in any mixture of analog, MDC 1200 digital or mixed mode.

In addition to the 16 channels supported on the analog and V.24 ports, the ECCGW can support up te 16 digital
conventional channels through its IP port. Mixed mode channels must use a V.24 port for the digital portion.

Enhanced GGM 8000 Conventional Channel Gateway - Connects dispatch operators to analog or digital
conventional channels in the system.

1.8.0.4 LAN Switches
The Core site equipment includes one or more LAN switches. The LAN switches aggregate all the Ethernet interfaces

fer all servers, clients, and routers at the core.

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1.8.0.5 Radio Frequency Distribution System

The Radio Frequency Distribution System (RFDS} provides interconnect between the base radios and antennas,
allowing for a completely contained and more compact installation footprint. For the transmitters, this can include
isolators, combiners, TX filters, diplexers, and power moniters.

For the receivers, this can include duplexers, site preselectors, and multicouplers. Various RFDS options exist for
each of the GTR 8000 Base Radio, GTR 8000 Site Subsystem, and GTR 8000 Expandable Site Subsystem.

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SECTION 2

MCC 7500 DISPATCH CONSOLE

Motorola Solutions, Inc. (Motorola Solutions) proposes our MCC 7500 dispatch console to provide The Nashua/
Manchester, NH Dispatch Center with the confidence of state-of-the-art communications, console management and
configuration functionality, dispatch operation, and communications security. Motorola Solutions designed its MCC
7500 console to help reduce the total cost of owning an IP-based, feature-rich dispatch system without
compromising quality and reliability. The MCC 7500 dispatch console will provide The Nashua/Manchester, NH
Dispatch Center with a scalable, flexible system architecture, sophisticated network management and security, and
an easy migration path to future capabilities.

2.1 MCC 7500 CONSOLE CONFIGURATION FOR THE NASHUA/
MANCHESTER, NH DISPATCH CENTER

The proposed solution offers The City's of Nashua and Manchester 4 MCC 7500 dispatch conscle[s] that will
interface seamlessly with The City's of Nashua and Manchester ASTRO® 25 system. A total of 4 operator positions
will be located across Back-Up EOC locations.

2.2 EMBRACING INTEROPERABILITY AND INTEGRATION

Motorola Sclutions has been an active participant in establishing P25 standards for interoperability, and the MCC
7500 console is a key component for the interoperability of Motorola Solutions’ ASTRO 25 system. When a situation
requires coordination between multiple agencies, the MCC 7500 dispatcher can patch together Mutual Aid radios
and required subscribers on the ASTRO 25 system (see the figure titled "Mutual Aid Components’). Incident
conversations are seamless from the moment of the patch initiation, and can be recorded like any talk group
conversation within the Land Mobile Radio (LMR) network. The dispatcher can also take part in and monitor
conversations for the duration of the incident, as necessary.

2.2.1 Integration with the ASTRG 25 Network

The MCC 7506 IP dispatch console will be seamlessly integrated into The City's of Nashua and Manchester ASTRO 25
system, without interface boxes, digital voice gateways or backroom electronics, for an integrated mission-critical
network. This tight union between radio infrastructure and dispatch console equipment has several operational
benefits to The Nashua/Manchester, NH Dispatch Center. The physical space needed to accommodate the MCC
7500 dispatch console position is comparable to that required for a personal computer. Both trunked talkgroups and
conventional radio channels can be accessed and controlled from one MCC 7500 IP dispatch console over the same
network. This architecture reduces overall transport costs and the need for duplicate fixed network equipment.

2.2.2 Connection to ASTRO 25 System

The flexibility of the ASTRO 25 system architecture allows the connection of the MCC 7500 tc be suited specifically tc
The City’s of Nashua and Manchester needs.

2.2.2.1 LAN Switches
The site LAN switches provide LAN interfaces for dispatch site equipment and a LAN port for the link to the core site.
Through the switch, service technicians can access the system's configuration manager and service the equipment.

2.2.3 Conventional Base Station Interfaces

The MCC 7500 consoles will access and control The City's of Nashua and Manchester analog and digital
conventional base stations through the use of conventional channel gateways (CCGW). The dispatch console
processes audio received from the station, and controls various features on the stations, such as frequency

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selection, private line selection, and repeater on/off. Additionally, the Enhanced CCGWs allow for recovery of MDC
1200 and digital signaling, such as unit ID, and emergency alarm, which is passed to the MCC 7500 dispatch operator
position(s).

2.3 MAKING CONSOLES EASY TO OPERATE

Motorola Solutions designed its MCC 7500 dispatch console to provide mission-critical audio between the dispatcher
and users in the field. Itis optimized for real-time audio, prioritizing emergency calls over other traffic, and minimizing
voice queuing. Using robust error mitigation to maintain call quality even when the system is heavily loaded, the MCC
7500 console reduces communication errors that may force dispatch console operators to repeat their
transmissions.

2.3.1 Customizable Dispatch Interface

The MCC 7500 console provides dispatch operators with a graphical user interface (GUI) that can be customized by
agency or by individual user to optimize user efficiency. Based on dispatcher preference, the MCC 7500 GUI can be
customized to show details of trunked and conventional RF channels on a per-channel basis. Busy dispatchers can
respond to a missed call by simply clicking on an entry in the Activity Log. The number of calls and call information
displayed in the Activity Log is customizable to suit the needs of the user. The status of auxiliary inputs and outputs
can be easily interpreted from the GUI with the use of familiar graphical icons, such as a door shown open or closed.

2.3.1.1 Elite Dispatch Graphical User interface

The MCC 7500 Elite Dispatch GUI is an enhanced version of Motorola Solutions’ Gold Elite Dispatch GUI. For existing
Gold Elite users, the GUI allows a smooth transition and minimal training for radio dispatch operators. For new users,
the graphical icons and customization options make the MCC 7500 console GUI easy tc learn and operate.

2.3.1.2 inbound Event Dispiay

For those users who prefer a call-based GUI, the MCC 7560 dispatch console supports the Inbound Event Display
(IED) GUI. The IED GUI displays incoming radio events in a queue format. The dispatch console user can manage and
respond to these events directly from the queue. Filtering and sorting features are available to allow the information
in the queue to be tailored to the needs of the dispatch console user. The console can be configured to operate in
“quiet mode” when using the IED GUI. This is well suited to customers who operate in a Request-To- Talk (RTT)
environment.

2.3.2 Standard Radio Transmission and Reception

A typical MCC 7500 console has a headset and two speakers, one for selected audic and the second for all remaining
unselected audio. Additional speakers can be added to the console, allowing dispatch operators to configure a
specific speaker for a set of designated audio sources. This simplifies multitasking between multiple audio sources,
allowing flexibility in the way the audio is presented to the dispatch operator.

2.3.2.1 Receiving Calls from the Field and Other Dispatch Operators

The MCC 7500 provides dispatch operators with great flexibility for how to hear calls from field radio users and other
dispatch operators. Each console dispatch operator can define his or her own audio reception profile by selecting a
single audio source, whether conventicnal or talkgroup, to be heard on a selected speaker or headset (“Single
Select”). The dispatcher can also define groups of radio resources that can all be heard on a selected speaker or
headset (“Multi-Select”).

2.3.2.2 Initiating Calls to the Field and Other Dispatch Operators

The dispatch operator has several different ways of initiating a call. In most circumstances, a “General Transmit” is
appropriate. With the general transmit, the dispatch operator selects a resource on the console and activates the
transmission through a footswitch, headset transmit button, or a microphone transmit button. If the dispatch operator
needs to quickly transmit on a resource that is not selected, the dispatcher uses the “Instant Transmit” function. An

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“Instant Transmit Safety Switch” prevents accidental activation of functions that may cause negative consequences.
The safety switch can be used with Aux I/Os and pre-defined pages, as well as, instant transmit switches.

2.3.2.3 Audio Communication te the Field and Other Dispatch Operators

The dispatch operator can transmit audio in different ways. They can make calls to all users listening to a specific
conventional radio resource or a specific trunking talkgroup. When multiple resources are required, the dispatcher
can select additional talkgroups and/or conventional channels, as needed, using the multi-select feature. The MCC
7500 console also enables dispatch operators to make private calls to individual field radio users or dispatch
operators. Once a private call is established, it can be patched in with another resource at the dispatch operator's
discretion.

2.3.2.4 Controiling Console Audio
The MCC 7500 console offers dispatchers several different ways of controlling or muting the audio on their consoles:

2 Audio volume can be changed for any specific resource.

* Allnon-selected resources on the console can be muted for 30 seconds (“All Mute”) or unmuted, if already
muted.

° Adispatcher can transmit on a resource while receiving audio from the same resource or other resources.

* Adispatcher can mute the other dispatch audio on a shared resource to prevent acoustic feedback when a
co-located operator position transmits.

2.3.25 Cortrofling Hetwaork Audio

Dispatch operators can control the audio on the ASTRO 25 network. Using the console, the dispatcher can enable or
disable radio users in order to compartmentalize traffic, reduce interruptions, and maintain communications between
dispatch and the field. When this function is enabled or disabled, all dispatch consoles with this resource assigned
are updated with the current status of the feature.

Note: This feature can be controlled from any dispatch console.

2.3.3 Emergency Radic Transmission and Reception

As part of a mission-critical communications network, the MCC 7500 console will facilitate immediate prioritization
and resolution of emergency communications between The City's of Nashua and Manchester dispatch and first
responders in the field, enabling dispatch operators and first responders to focus on their mission, not their
equipment—especially during critical situations.

2.3.4.1 Receiving an Emergency Call

When a field user or another dispatch operator initiates an emergency call, the console emits both visual and audible
indications ("Emergency Alarm”). The audible indication alerts the dispatch operator that an emergency is
underway, the visual indication directs the dispatch operator's attention to the specific resource making the
emergency call. The dispatch operator can immediately reserve a voice channel for the duration of the emergency.

2.3.3.2 Responding to an Emergency Call

A dispatch operator can bypass the standard console interface to auto-open a quick list, which contains specific
controls for recognizing an emergency call, initiating an emergency call, and ending an emergency call (“Auto-Open
of Quick List”). The dispatcher can then “recognize” the emergency call, which ends the audible emergency
indication and notifies all dispatch operators that the emergency is being addressed (“Emergency Recognize”).

The audible emergency indication may also be muted by a dispatch operator without recognizing the emergency
alarm (“Mute Tones at a Single Op”). This would be used in a situation where one agency is monitoring a channel
that belongs to ancther agency. That channel can be configured to not generate audible and/or visual emergency
indications.

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2.3.3.3 Ending an Emergency Cail

When an emergency is over, the dispatch console user can end the Emergency Alarm. The visual indication on the
console GUI is removed, and the console informs the other operator positions that the emergency is over
(“Emergency End/Knockdown”). The emergency mode remains active on the initiating radio unit until it is ended
(reset) by the radio user.

2.3.4 Radio Patch Control

MEC 7500 console users can patch communication between trunked and/or conventional radios that are normally
unable to communicate with each other due to different features, programming, or even different frequency bands. A
patch group is a group of linked resources that can both receive messages from a console and transmit to all other
members of the patch group.

2.3.4.4 Setting up a Standard Patch

Patches are supported between trunked resources and/or conventional resources. After the patch is created, the
dispatch console transmits all audio on one resource to all other resources in the patch group. In a patch between
trunked resources, patched radio users with displays see the ID or alias of the other patched radio(s), as opposed to
that of the console. This minimizes confusion and the need for the dispatch operator to intervene in the call. Patches
are automatically re-established if interrupted, so the MCC 7500 user can concentrate on continuing operations.

2.3.4.2 Pre-Defined Patches
Patches can be pre-defined and automatically re-initiated each time a dispatch console computer is restarted
("Patch Auto-Start”).

2.3.5 Call Management and Control

2.3.5.1 Automatic Prioritization of Calls

Calls on the MCC 7500 console are prioritized through a transmission hierarchy. Calls from primary supervisors take
priority over those from secondary supervisors, which in turn take priority over non-supervisors. Instant Transmit or
All-Points Bulletin (APB) transmissions, regardless of whether they are from a supervisor, take priority over general
or patch transmissions.

Multiple dispatch console operators can be designated as primary supervisors on the same system, which is useful
when multiple agencies share one system. With the Network Manager Client installed, console supervisors can
disable and enable operator console functionality as needed.

2.3.5.2 Nianuai Prioritization of Calls

“System Access Priority Select” allows a dispatch operator te prioritize trunked resources on the system as either
“normal” or “tactical.” A dispatch operator can change the priority of a trunked resource to tactical to give the
resource a better chance of gaining communication access on a busy system. Only emergency calls have a higher
priority than tactical. When the System Access Priority status of a resource is changed, itis updated at all dispatch
consoles in the systems that are monitoring that trunked resource.

2.3.5.3 Using the Niulti-Select Feature

The Multi-Select feature allows a dispatch console to define groups of selected radio resources. When a Multi-
Select group is opened, all of the resources in the group are simultaneously selected. Resources can be added or
removed from a Multi-Select group while it is cpen or closed. The dispatcher can transmit on several resources
simultaneously or can listen to multiple resources simultaneously in their headset or select speakers.

2.3.54 Standard Call Indications
The MCC 7500 console indicates the availability of any given resource, regardless of whether the resource is
involved in a transmission. An inbound call indication provides the dispatch operator with a visual cue of audio

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CITY OF NASHUA, NEW HAMPSHIRE
BOARD OF PUBLIC WORKS' RETIREMENT SYSTEM
REQUIRED SUPPLEMENTARY INFORMATION
SCHEDULE OF CHANGES IN THE NET PENSION LIABILITY

(Unaudited)
2021 2020 O19 2018 2017 2016 2015 O14

Total Pension Liability

Service cost $ 1,194,402 $ 0,159613 8 1.159.714 $1,125,936 8 1102418 § 1,070,306 F 833,083 $ 801,04)

Interest 3,546,569 3.438385 3,413,621 3,302,509 3,317,923 3,201,701 3,165,454 3,056,600

Differences between expected and actual expenence (933,080) = (794,224) = (262,266) . 84,012 -

Changes of assumptions 1,910,247 - (466,050) - 24,291 : (1,231,934) -

Benefit payments, inching refunds of

member conmibutons 3,179,286} (2,998,396) (2,931,280) (2,830,049) (2,752,954) (2,650,932) (2,526,991) (2,255,102)

Net change in total pension Kabibty 2,538,852 1,599,602 391,781 1,598,396 1,429,409 1,621,075 323,624 1,602,539
Total pension habilty - begwuing 51,033,623 49,434.02] 49042240 47,445,844 46.014435 44,393,360 —44.069,736 = 42,466,375
Total pension kability + ending (a) 53,572,475 St,033,623 49,434,021 49,042,240 47,443,844 46,014,435 44,393,360 44,068,914
Plan Fiduciary Net Position

Contributions - employer 907,292 852,993 832,686 823,768 795,263 794,440 772,343 743,527

Contribunons - member 907,292 852,993 832,686 823,768 795,263 794,440 772,343 742,704

Net mivestment income VL ,103,338 1,909,696 2,871,652 3,290,484 3,956,902 115,127 1,104,870 3,478,296

Benefit payments, mcludng refunds of

member contnbunons (3,179,286) (2,998,396) (2,921,280) (2,830,049) (2.752.954) (2,650,932) (2,526,991) (2,254,280)

Admamnustrative expense (61,626) (51.616) (2,580) (2,569) (2,504) (2,903) (2,359) (14,809)
Net change m plan fiduciary net posibon 9,677,010 565,670 1,613,164 2,105,402 2.791.570 (949,823) 126,206 2.695, 438
Plan fiduciary net posivon - begmung 43,638,120 43,072,450 41,459,286 39,353,884 36,562,314 37,512,143 37,391,937 34,696,499
Plan fiduciary net posinon - ending (b) 53,315,130 43,638,120 43,072,450 41,459,286 39,353,884 36,562,315 37,512,143 37,391,937 |
Net pension ability (asset) - ending (a-b) $ 257345 & 7.395503 3 6.365.571 $7,582,954 $ $.089,960 § 9.452.120 5 688217 $6,676,977 |

Schedule is tntended ta show information for 10 years. Additional years will be displayed as they become available.

Sce notes to the Cris’s fi ial for » of signifi Imeihods and 4

See Independent Audtors’ Report

158