Snom C520 WiMi User manual

C520
SIP Wireless Conference Phone
User Manual
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Owen Ju | 29.03.2019 | Revision 1.1AW | C520_WIMI_US ver.
illustration scale 100%

When using the conference phone, basic safety precauons should always be followed
to reduce the risk of re, electric shock and injury to persons, including the following:
1. Read and understand all instrucons.
2. Follow all warnings and instrucons marked on the product.
3. This product should only be connected to the host equipment and never directly
to the network such as Public Switch Telephone Network (PSTN) or Plain Old
Telephone Services (POTS).
4. Unplug this product from the wall outlet before cleaning. Do not use liquid or
aerosol cleaners. Use a damp cloth for cleaning.
5. Do not use this product near water such as near a bathtub, wash bowl, kitchen
sink, laundry tub or swimming pool, or in a wet basement or shower.
6. Do not place this product on an unstable table, shelf, stand or other unstable
surfaces.
7. Slots and openings in the back or boom of the base unit and wireless mic are
provided for venlaon. To protect them from overheang, these openings must
not be blocked by placing the product on a so surface such as a bed, sofa or rug.
This product should never be placed near or over a radiator or heat register. This
product should not be placed in any area where proper venlaon is not provided.
8. This product should be operated only from the type of power source indicated on
the marking label. If you are not sure of the type of power supply in your oce,
consult your dealer or local power company.
9. Do not allow anything to rest on the power cord. Do not install this product where
the cord may be walked on.
10. Never push objects of any kind into this product through the slots in the base unit
or wireless mic because they may touch dangerous voltage points or create a short
circuit. Never spill liquid of any kind on the product.
11. To reduce the risk of electric shock, do not disassemble this product, but take
it to an authorized service facility. Opening or removing parts of the base unit
or wireless mic other than specied access doors may expose you to dangerous
voltages or other risks. Incorrect reassembling can cause electric shock when the
product is subsequently used.
12. Do not overload wall outlets and extension cords.
13. Unplug this product from the wall outlet and refer servicing to an authorized
service facility under the following condions:
When the power supply cord or plug is damaged or frayed.
B. If liquid has been spilled onto the product.
C. If the product has been exposed to rain or water.
D. If the product does not operate normally by following the operang
instrucons. Adjust only those controls that are covered by the operaon
instrucons. Improper adjustment of other controls may result in damage
and oen requires extensive work by an authorized technician to restore the
product to normal operaon.
Important safety instrucons
i

E. If the product has been dropped and the base unit and/or wireless mic has
been damaged.
F. If the product exhibits a disnct change in performance.
14. Avoid using the C520 SIP Conference phone during an electrical storm. There is a
remote risk of electric shock from lightning.
15. Do not use the C520 SIP Conference phone to report a gas leak in the vicinity of
the leak. Under certain circumstances, a spark may be created when the adapter
is plugged into the power outlet, or when the wireless mic is replaced in its cradle.
This is a common event associated with the closing of any electrical circuit. The
user should not plug the phone into a power outlet, and should not put a charged
wireless mic onto the charging cradle, if the phone is located in an environment
containing concentraons of ammable or ame-supporng gases, unless there
is adequate venlaon. A spark in such an environment could create a re or
explosion. Such environments might include: medical use of oxygen without
adequate venlaon; industrial gases (cleaning solvents; gasoline vapors; etc.); a
leak of natural gas; etc.
16. Only put the wireless mic next to your mouth when it is in normal talk mode.
17. The power cables are intended to be correctly oriented in a vercal or oor mount
posion. The prongs are not designed to hold the plug in place if it is plugged into
a ceiling or cabinet outlet.
18. Use only the adapter included with this product. Incorrect adapter polarity or
voltage can seriously damage the product.
Base unit power adapter: Input 100–240V AC 50/60Hz; output: 9V DC 1500mA.
19. For pluggable equipment, the socket-outlet shall be installed near the equipment
and shall be easily accessible.
20. CAUTION: Use only the baeries indicated in this manual. There may be a risk of
explosion if a wrong type of baery is used. Use only the supplied rechargeable
baery or replacement baery pack (BT183642/BT283642). Do not dispose of
baeries in a re. They may explode. Dispose of used baery according to the
informaon in The RBRC®seal.
21. WARNING: The product included (ITE) in this manual is to be connected only to
PoE networks without roung to the outside plant.
SAVE THESE INSTRUCTIONS
Baery
• CAUTION: Use Only Supplied Baery.
• Do not dispose of the baery in a re. Check with local waste management codes
for special disposal instrucons.
• Do not open or mulate the baery. Released electrolyte is corrosive and may
cause burns or injury to the eyes or skin. The electrolyte may be toxic if swallowed.
• Exercise care in handling baeries in order not to create a short circuit with
conducve materials.
• Charge the baery provided with or idened for use with this product only in
accordance with the instrucons and limitaons specied in this manual.
ii

Precauons for users of implanted cardiac pacemakers
Cardiac pacemakers (applies only to digital cordless telephones):
Wireless Technology Research, LLC (WTR), an independent research enty, led
a muldisciplinary evaluaon of the interference between portable wireless
telephones and implanted cardiac pacemakers. Supported by the U.S. Food and Drug
Administraon, WTR recommends to physicians that:
Pacemaker paents
• Should keep the wireless telephone at least six inches from the pacemaker.
• Should NOT place wireless telephones directly over the pacemaker, such as in a
breast pocket, when it is turned ON.
• Should use the wireless telephone at the ear opposite the pacemaker.
WTR’s evaluaon did not idenfy any risk to bystanders with pacemakers from other
persons using wireless telephones.
About wireless microphones
• Privacy: The same features that make a wireless microphone convenient create
some limitaons. Calls on conference phones are transmied between the base
unit and the wireless microphone by radio waves, so there is a possibility that
the wireless microphone conversaons could be intercepted by radio receiving
equipment within range of the wireless microphone. For this reason, you should
not think of conference phone conversaons as being as private as those on corded
telephones.
• Electrical power: The base unit of this conference phone must be connected to
a working electrical outlet. The electrical outlet should not be controlled by a
wall switch. Calls cannot be made from the conference phone if the base unit is
unplugged, switched o or if the electrical power
is interrupted.
• Potenal TV interference: Wireless microphone operates at frequencies
that may cause interference to televisions and VCRs. To minimize or prevent
such interference, do not place the base unit near or on top of a TV or VCR. If
interference is experienced, moving the wireless microphone farther away from the
TV or VCR oen reduces or eliminates the interference.
• Rechargeable baeries: Exercise care in handling baeries in order not to create a
short circuit with conducng material such as rings, bracelets and keys. The baery
or conductor may overheat and cause harm.
• Nickel-metal hydride rechargeable baeries: Dispose of these baeries in a safe
manner. Do not burn or puncture. Like other baeries of this type, if burned or
punctured, they could release causc material which could cause injury.
iii

iv
For C-UL compliance only
Mesures de sécurité importantes
Vous devez toujours observer des mesures de précauon lorsque vous ulisez le
Téléphone de conférence à protocole d’inialisaon de session SIP C520, an d’éviter
les risques d’incendie, d’électrocuon et de blessures, incluant ce qui suit :
1. Lisez et comprenez bien toutes les instrucons.
2. Observez toutes les instrucons et mises en garde inscrites sur l’appareil.
3. Cet appareil doit être branché à un équipement hôte et jamais branché à un
réseau, tel qu’un réseau PSTN publique ou un réseau téléphonique standard
(POTS).
4. Débranchez ce téléphone de la prise murale avant de le neoyer. N’ulisez pas
de neoyeurs liquides ni en aérosol. N’ulisez qu’un chion doux et légèrement
humecté.
5. N’ulisez pas ce produit près de l’eau, tel que près d’un bain, d’un lavabo, d’un
évier de cuisine, d’un bac de lavage ou d’une piscine, ou dans un sous-sol humide
ou sous la douche.
6. Ne déposez pas ce téléphone sur un chariot, support ou table chancelants.
L’appareil pourrait tomber et être sérieusement endommagé.
7. Les ouvertures situées à l’arrière ou sous le socle et le microphone sans l servent
à la venlaon. An d’empêcher la surchaue, ces ouvertures ne doivent pas être
obstruées en plaçant l’appareil sur un lit, divan, tapis ou autre surface similaires.
Ne placez pas cet appareil à proximité d’un élément de chauage ni d’une plinthe
électrique. De plus, ne l’installez pas dans une unité murale ou un cabinet fermé
qui ne possède pas d’aéraon adéquate.
8. Ne faites fonconner cet appareil qu’avec le type d’alimentaon indiqué sur les
équees de l’appareil. Si vous ne connaissez pas le voltage de votre maison,
consultez votre marchand ou votre fournisseur d’électricité.
9. Ne déposez rien sur le cordon d’alimentaon. Installez cet appareil dans un endroit
sécuritaire, là où personne ne pourra trébucher sur la ligne d’alimentaon ni le
cordon téléphonique modulaire.
10. N’enfoncez jamais d’objets dans les fentes du socle ou du microphone sans l,
car ceci risquerait d’entrer en contact avec des points de tension dangereux ou
provoquer un court-circuit. N’échappez pas de liquides dans l’appareil.
11. An de réduire les risques d’électrocuon, ne démontez pas l’appareil, mais
apportez-le plutôt à un centre de service qualié s’il doit être réparé. L’ouverture
ou le retrait de pièces du socle ou du microphone sans l autre que les portes
d’accès peuvent vous exposer à des tensions dangereuses et à d’autres risques.
Débranchez l’appareil avant de procéder au neoyage. Ulisez un chion humide
et doux.
12. Ne surchargez pas les prises de courant et les rallonges.

v
13. Débranchez cet appareil de la prise de courant et communiquez avec le
département de service à la clientèle de Snom dans les cas suivants :
A. Lorsque le cordon d’alimentaon est endommagé ou écorché.
B. Si du liquide a été échappé dans l’appareil.
C. Si l’appareil a été exposé à une source d’humidité telle que la pluie ou l’eau.
D. Si le produit ne fonconne pas normalement en respectant les instrucons
de fonconnement. Réglez uniquement les commandes indiquées dans le les
instrucons de fonconnement. Les réglages incorrects des autres commandes
pourraient provoquer un dommage qui pourrait exiger un travail exhausf de
la part d’un technicien autorisé an de rétablir le fonconnement normal de
l’appareil.
E. Si le produit a été échappé et que le socle et/ou le microphone sans l a été
endommagé.
F. Si le produit ache une nee diminuon de sa performance.
14. Évitez d’uliser le Téléphone de conférence à protocole d’inialisaon de session
SIP C520 pendant un orage.
15. N’ulisez pas le Téléphone de conférence à protocole d’inialisaon de session
SIP C520 pour rapporter une fuite de gaz à proximité de la fuite. En certaines
circonstances, une ammèche pourrait être provoquée lorsque l’adaptateur
est branché dans une prise de courant ou lorsque le microphone auxiliaire est
déposé sur son socle. Ceci est un événement commun associé à la fermeture
d’un circuit électrique. L’ulisateur ne doit pas brancher le téléphone dans une
prise de courant ni insérer un microphone sans l rechargé dans le socle, si le
téléphone se trouve dans un environnement contenant des concentraons de
maères inammables ou autres gaz suscepbles de produire des ammes,
sauf en présence d’une aéraon adéquate. Une ammèche dans un tel endroit
pourrait provoquer un incendie ou une explosion. De tels environnements peuvent
comprendre: des endroits où l’on ulise de l’oxygène médical sans venlaon
adéquate; des gaz industriels (dissolvants de neoyage, des vapeurs d’essence,
etc.); une fuite de gaz naturel, etc.
16. Ne déposez que le microphone sans l près de votre oreille que lorsqu’il est en
mode de conversaon normale.
17. Ces adaptateurs ont été conçus pour être orientés en posion vercale ou montés
au sol. Les broches ne sont pas conçues pour maintenir l’adaptateur en place si
celui-ci est barnché dans une prise au plafond ou sous une table/ armoire.
18. N’ulisez que les adaptateurs inclus avec ce produit. L’ulisaon d’un adaptateur
dont la polarité ou la tension serait inadéquate risque d’endommager
sérieusement le produit et mere votre sécurité en péril.
Socle d’accueil : Adaptateur d’alimentaon : Entrée : 100-240 V CA, 50/60 Hz
Sore : 6,0 V CC @ 400 mA
19. Pour les PRODUITS À BRANCHER À UNE PRISE DE COURANT, la prise de courant
doit être installée près du produit, an d’assurer une accessibilité sécuritaire à la
prise de courant.

vi
20. MISE EN GARDE : Il peut y avoir un risque d’explosion si vous ulisez le mauvais
type de piles. N’ulisez que le bloc-piles rechargeable inclus ou le bloc-piles de
rechange. N’incinérez pas les piles. Celles-ci risqueraient d’exploser. Jetez les piles
usées selon les renseignements suivant le sceau du RBRCMD.
21. AVERTISSEMENT : Le produit inclus (ITE) dans ce guide doit être connecté
uniquement aux réseaux PoE sans être acheminé vers l’installaon extérieure.
CONSERVEZ CES INSTRUCTIONS
Smulateurs cardiaques implantés dans l’organisme
Les simulateurs cardiaques (s’applique uniquement aux téléphones numériques sans
l):
L’organisme ‘Wireless Technology Research, LLC (WTR)’, une rme de recherche
indépendante, a mené une évaluaon pluridisciplinaire des interférences entre les
téléphones sans l portafs et les smulateurs cardiaques implantés dans l’organisme.
Appuyée par l’Administraon des aliments et drogues (FDA) des États-Unis, la rme
WTR recommande aux médecins:
Avis aux détenteurs de smulateurs cardiaques
• Ils doivent tenir le téléphone sans l à une distance d’au moins six pouces du
smulateur cardiaque.
• Ils ne doivent PAS placer le téléphone sans l directement sur le smulateur
cardiaque, tel que dans une poche de chemise, lorsque celui-ci est en marche.
• Ils doivent uliser le téléphone sans l en l’appuyant sur l’oreille qui se trouve dans
la direcon opposée au smulateur cardiaque.
L’étude eectuée par l’organisme WRS n’a pas idené de risque pour les détenteurs
de simulateurs cardiaques causés par les gens qui ulisent un téléphone sans l à
proximité de ceux-ci.
À propos des microphones sans l
• Condenalité: Les mêmes caractérisques qui constuent des avantages pour les
téléphones sans l achent également des restricons. Les appels téléphoniques
sur les téléphones conférence sans l sont transmis entre le combiné sans l et
le socle par le biais d’ondes radio ; il y a donc la possibilité que vos conversaons
téléphoniques sans l soient interceptées par des équipements de récepon radio
se trouvant dans la portée du combiné sans l. Pour cee raison, vous ne devez
pas percevoir les communicaons sur les téléphones conférence sans l comme
étant aussi condenelles que celles des téléphones à cordons.
• Alimentaon électrique: Le socle de ce téléphone conférence sans l doit être
branché à une prise électrique fonconnelle. La prise électrique ne doit pas être
contrôlée par un interrupteur mural. Les appels ne pourront pas être eectués du
téléphone conférence sans l si le socle est débranché ou mis hors tension ou si le
courant est interrompu.

vii
• Possibilité d’interférences aux téléviseurs: Certains microphones sans l sans l
fonconnent sur des fréquences pouvant causer des interférences aux téléviseurs
et aux magnétoscopes. Pour réduire ou prévenir de telles interférences, ne
placez pas le socle du téléphone sans l à proximité ou sur un téléviseur ou
magnétoscope. S’il y a présence de parasites, il est conseillé d’éloigner le
téléphone sans l du téléviseur ou du magnétoscope an de réduire possiblement
les interférences.
• Piles rechargeables: Manipulez les piles avec soin an de ne pas les court-circuiter
avec des bagues, bracelets ou clés. Les piles ou le conducteur peut surchauer et
causer des blessures.
• Les bloc-piles rechargeables à l’hydrure métallique de nickel: Jetez ces blocs-piles
de manière écologique et sécuritaire. Ne les incinérez pas et ne les percez pas. Tel
que les autres piles de ce type, elles pourraient dégager une maère toxique qui
peut causer des blessures corporelles si elles sont brûlées ou percées.
FCC and IC regulations
FCC Part 15
This equipment has been tested and found to comply with the requirements for a Class B
digital device under Part 15 of the Federal Communicaons Commission (FCC) rules. These
requirements are intended to provide reasonable protecon against harmful interference
in a residenal installaon. This equipment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with the instrucons, may cause harmful
interference to radio communicaons. However, there is no guarantee that interference will not
occur in a parcular installaon. If this equipment does cause harmful interference to radio or
television recepon, which can be determined by turning the equipment o and on, the user is
encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separaon between the equipment and receiver.
• Connect the equipment into an outlet on a circuit dierent from that to which the receiver is
connected.
• Consult the dealer or an experienced radio/TV technician for help.
Changes or modicaons to this equipment not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
This device complies with Part 15 of the FCC rules. Operaon is subject to the following two
condions: (1) this device may not cause harmful interference, and (2) this device must accept
any interference received, including interference that may cause undesired operaon. Privacy of
communicaons may not be ensured when using this telephone.
To ensure safety of users, the FCC has established criteria for the amount of radio frequency
energy that can be safely absorbed by a user or bystander according to the intended usage of the
product. This product has been tested and found to comply with the FCC criteria. The wireless
mic may be safely held against the face of the user. The base unit shall be installed and used such
that parts of the user’s body other than the hands are maintained at a distance of approximately
20 cm (8 inches) or more.

viii
Industry Canada
This Class B digital apparatus complies with Canadian requirement: CAN ICES-3 (B)/NMB-3(B).
Cet appareil numérique de la classe B est conforme à la norme CAN ICES-3 (B)/NMB-3(B) du
Canada.
This device contains licence-exempt transmier(s)/receiver(s) that comply with Innovaon,
Science and Economic Development Canada's licence-exempt RSS(s).
Operaon is subject to the following two condions: (1) this device may not cause interference,
and (2) this device must accept any interference, including interference that may cause
undesired operaon of the device.
Privacy of communicaons may not be ensured when using this telephone.
The term ‘’IC:‘’ before the cercaon/registraon number only signies that the Industry
Canada technical specicaons were met.
This product meets the applicable Innovaon, Science and Economic Development Canada
technical specicaons.
The RBRC® Seal means that the manufacturer is voluntarily
parcipang in an industry program to collect and recycle nickel-
metal hydride rechargeable baeries when taken out of service
within the United States. These baeries may be taken to a
parcipang local retailer of replacement baeries or recycling
center. Or you may call 1 (800) 8 BATTERY® for locaons accepng
spent Ni-MH baeries.
RBRC®and 1 (800) 8 BATTERY®are registered trademarks of the
Rechargeable Baery Recycling Corporaon.
The RBRC®seal

Table of contents
Introduction............................1
About the C520 Conference Phone .... 1
Introduction............................2
Parts checklist ....................................... 2
Getting Started.......................3
Connecng............................................ 3
Install the wireless mic baery ........... 4
Before use............................................. 5
Base unit overview (front).................... 6
Base unit overview (front), connued. 7
Base unit overview (front), connued. 8
Base unit overview (rear) ..................... 8
Wireless microphone overview ........... 9
Status indicators overview .................. 10
Idle screen............................................ 11
Idle mode screen icons........................ 11
Acve call screen icons........................ 12
Using the phone menu........................ 13
Main menu items ................................ 13
Conference phone operation13
Making calls ......................................... 14
Using a wireless microphone during a call
15
Ending the call ..................................... 15
Answering a call................................... 16
Missed call ........................................... 16
Pung a call on hold........................... 16
Forwarding calls................................... 17
Transferring calls.................................. 19
Making a conference call..................... 21
Creang a conference with a held call:21
Seng up a network conference........ 22
Retrieving messages............................ 22
Redialing .............................................. 23
Mung acve calls............................... 23
Temporarily silencing the ringer.......... 23
Locang wireless microphones........... 24
Making and receiving calls on cell phone
25
Transferring Bluetooth calls from the C520
to your cell phone........................... 26
Conference calls with a Bluetooth-
connected cell phone..................... 26
Playing audio with a Bluetooth-connected
call phone ....................................... 26
Using a Bluetooth headset.................. 27
Phone Features.....................28
Using the Features menu .................... 28
Using the Call menu ............................ 29
Using the Bluetooth menu.................. 33
Changing the C520 PIN........................ 35
Using the local directory...................... 36
Call history ........................................... 39
Speed Dial............................................ 41
Entering speed dial numbers .............. 41
Sending a Mulcast Page .................... 42
Conguring the Phone.........43
Conguring the phone ........................ 43
Using the User sengs menu............. 43
Preferences.......................................... 44
Seng the language............................ 44
Seng date and me preferences ..... 44
Restarng the phone........................... 46
Display.................................................. 46
Audio.................................................... 47
Registering wireless microphones ...... 48
Deregistering wireless microphones... 49
Registering an oponal cordless headset
49
Deregistering a cordless headset........ 50

Table of contents
Deregistering the cordless headset without
the C520.......................................... 50
Cordless accessory registraon and
deregistraon me-out.................. 50
Registering wireless C52-SP speakerphones
51
Deregistering C52-SP Speakerphone(s)52
WebUI ....................................53
Using the Web User Interface (WebUI)53
Status ................................................... 54
Call Sengs.......................................... 55
User Preferences ................................. 57
Program Dial So Keys ........................ 58
Speed Dial............................................ 59
Directory .............................................. 60
Blacklist (Deny List).............................. 63
User Password ..................................... 63
Appendix ...............................64
Baery ................................................. 64
Troubleshooting ...................65
Maintenance..........................69
California Energy Commission
battery charging testing
instructions...........................70
Technical specications ......71

1
Introducon
About the C520 Conference Phone
The C520 SIP Conference phone is designed for use in oce sengs. It consists of the
phone and two wireless microphones, enabling parcipants in a meeng room to deliver
clear conversaon during a confernce call.
Expand calling opons with other devices
The C520 also has Bluetooth and DECT connecvity, giving you opons for how and where
you can make and answer calls with the conference phone. Aer pairing Bluetooth devices
with the C520, you can use the conference phone in parallel with your cell phone, or use a
Bluetooth headset for a private conversaon.
For large meeng rooms, you can extend the range of the C520 with up to three Snom
C52-SP DECT Expansion Speakerphones.
The following accessories or devices can be paired with the C520:
• Bluetooth-equipped cell phones and/or headsets
A total of four Bluetooth devices can be paired, but not all of them can be
connected and acve. Two cell phones, or one cell phone and one headset, or one
headset can be connected at a me.
• Snom C52-SP SIP DECT Expansion Speakerphone (up to three)
• Wireless DECT headset
You can use connected devices in the following situaons:
• Enable all conference aendees to talk to your party from anywhere in a large
meeng room using C52-SP DECT Expansion Speakerphones.
• Answer calls to your connected cell phone on the C520 or on a C52-SP Wireless
Speakerphone also connected to the C520.
• Make calls on your cell line using the C520.
• Answer incoming calls to the C520 or to your paired cell phone using a DECT
cordless headset.
• Transfer SIP call audio from the C520 to a Bluetooth headset when you need to
talk privately aer a conference.

2
Introducon
Ethernet cable
Baery ×2
Wireless mic ×2
Base unit
DC power cable
(with yellow plugs)
Parts checklist
Your conference phone package contains the items shown below. Save your sales
receipt and original packaging in the event warranty service is necessary.
AC power cord
Power adapterBaery door ×2
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Quick start guide
(x4) (x4)
Quick installaon
guide
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WXYZ
3DEF
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ABC
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PQRS
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C520
Quick
installaon
guide

3 4
Connecng
The C520 can be powered by AC power or Power over Ethernet (PoE).
If PoE is not available, use AC power, as shown below.
Note: the conference phone requires a network connecon to an IP PBX to
operate. This manual assumes that your network infrastructure is established and
that your IP PBX phone service has been ordered and congured for your locaon.
1. Plug one end of the DC power cable into the power jack of the phone, and plug
the other end into the yellow C520 jack of the power adapter. Route the cord
through the slots.
2. Plug one end of the Ethernet cable into the LAN jack of the power adapter, and
plug the other end into a network switch or router.
3. Plug the small end of the AC power cord into the power jack of the adapter, and
plug the large end into a wall outlet not controlled by a switch.
• The supplied power adapter is designed for use with only the Conference phone.
It is not designed to power other network devices. Do not connect the supplied
power adapter to any other network devices through the supplied DC power cable
or any other Cat5e ethernet cable.
• The AC power cord is intended for a vercal or oor mount posion. The prongs
are not designed to hold the plug in place if it is plugged into a ceiling or cabinet
outlet.
Geng Started
3
AC power cord
1
2
Wall outlet
Network switch
or router
DC power cable
(with yellow plugs) Ethernet cable
Slots
To Adapter
Adapter
Network switch
or router
Ethernet cable
Slots
Battery X2
LAN
C520

3 4
Geng Started
To power the C520 using PoE:
1. Plug one end of the Ethernet cable into the Ethernet port on the boom of the unit.
2. Plug the other end of the cable into your network router or switch. When the base
unit is powered up, the status indicators turn green for about two seconds.
Note: You can connect the C520 to both PoE and AC power. Ensure that you
connect the cables in the order shown in the diagram on page 3. The phone
will use PoE; if PoE fails, the phone will use AC power as a backup.
Install the wireless mic baery
1. Plug the baery connector securely into the socket inside the baery
compartment. Insert the baery (with the label THIS SIDE UP facing up) into the
baery compartment.
2. Slide the baery door unl it clicks into place.
3. Place the wireless mic onto the charging cradle.
Note: The status indicator on the wireless mic turns orange when charging, and
turns o when the wireless mic is fully charged.
3
AC power cord
12
LAN
VCS752
Wall outlet
Network switch
or router
DC power cable
(with yellow plugs) Ethernet cable
Slots
To Adapter
Adapter
Network switch
or router
Ethernet cable
Slots
Battery X2
3
AC power cord
12
LAN
VCS752
Wall outlet
Network switch
or router
DC power cable
(with yellow plugs) Ethernet cable
Slots
To Adapter
Adapter
Network switch
or router
Ethernet cable
Slots
Battery X2

5 6
Before use
Check for dial tone
• Press . If you hear a dial tone, and see that the status indicator turns green
on the base unit, the installaon is successful.
If you do not hear a dial tone:
• Recheck the installaon diagram and the connecons to the unit.
• Ensure the unit is correctly congured with the correct SIP account informaon.
For more informaon, see the C520 Administrator and Provisioning Guide.
• Consult your service provider if you require addional user accounts or if you
suspect a service disrupon is at fault.
Operang range
The maximum range between the conference phone and its wireless microphones and
any connected speakerphones can vary, depending on their locaons and the layout of
your oce.
When a wireless microphone is out of range, it must be returned to the charging cradle
to be able to reconnect with the phone.
If there is an incoming call while the wireless microphone is out of range, its green call
LED will not ash to indicate an incoming call. If the wireless microphone is moved
out of range during a telephone conversaon, there may be interference. To improve
recepon, move it closer to the conference phone.
Geng Started

5 6
Base unit overview (front)
Geng Started
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Loudspeaker
Wireless
microphone
Two-way toggle Two-way toggle
Two-way toggle
Four-way toggle
Microphone
Display
Status LED of
Bluetooth speakerphone
Status LED of
Bluetooth headset
Wireless
microphone
Status LED
(system status)
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Increase
Decrease
Volume:
Mute/unmute Accept/terminate calls
Naviga on key
Hold/resume call Menu
Cancel/terminate Select/con rm
Context-sensi ve tabs (labels) for
corresponding func on keys
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W X Y Z
3DEF
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JKL
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A B C
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Context-sensi ve
func on keys (so keys)
Dial Edit DialDelete
Context-sensi ve
func on keys (so keys)
Keypad

7 8
Geng Started
Status LED
• Indicates the system status. See "Status indicators overview" on page 10.
Wireless Microphones
Loudspeaker
Bluetooth status LED
Indicates the status of a Bluetooth-connected device other than a headset.
See "Status indicators overview" on page 10.
Headset/Bluetooth status LED
Indicates the status of the Bluetooth-connected device. See "Status indicators
overview" on page 10.
Display. LCD screen.
Context-sensive funcon keys
Press to perform acons as indicated by the labels in the funcon key line on the
display.
Hold/Cancel key (toggle)
• When in a call, press to put the call on hold and to unhold the held call.
• When in a menu, press to return to the previous menu.
Menu/OK key (toggle).
• Press to show the menu.
• Press to select an item, or save an entry or seng in a menu.
Volume key (toggle)
• When the phone is idle, press to increase the ringer volume, press to
lower the ringer volume.
• During a call, press to increase louspeaker volume, press to lower
louspeaker volume.
Mute key
During a call, press to mute and unmute all microphones in the system.
Base unit overview (front), connued

7 8
Keypad
• Press to enter numbers or characters.
• While eding names, press
0
to add a space.
Navigaon key (four-way toggle)
• Press top or boom edge to scroll up or down, respecvely, while in a menu,
phonebook, or call log.
• Press le or right edge to move the cursor le or right, respecvely, while
entering names or numbers.
• Press le or right edge to view addional funcon key labels and view
mulple acve calls.
Call key. Press to make, answer, or end a call.
Front microphone
Base unit overview (rear)
Geng Started
a
RJ45 jack
• With PoE: To network
• Without PoE: To adapter
Base unit overview (front), connued

9 10
Wireless microphone overview
1. Microphone
• Funcons as a extended microphone of the conference phone during a call.
2. Status LED
• Indicates the system status. See "Status indicators overview" on page 10.
3. (MUTE ALL)
• During a call, press to mute or end mute all microphones in the system.
4. Baery door
5. Charging contacts
1
2
3
4
5
Geng Started