Cisco 8832 Maintenance

ConditionMetric Change
• Noise or distortion in the audio channel such as
echo or audio levels.
• Tandem calls that undergo multiple
encode/decode such as calls to a cellular network
or calling card network.
• Acoustic problems coming from a speakerphone,
handsfree cellular phone or wireless headset.
Check packet transmit (TxCnt) and packet receive
(RxCnt) counters to verify that voice packets are
flowing.
Conceal Ratio is near or at zero, but the voice quality
is poor.
Network impairment from packet loss or high jitter
levels:
• Average MOS LQK decreases may indicate
widespread and uniform impairment.
• Individual MOS LQK decreases may indicate
bursty impairment.
Cross-check the conceal ratio and conceal seconds
for evidence of packet loss and jitter.
MOS LQK scores decrease significantly
• Check to see if the phone is using a different
codec than expected (RxType and TxType).
• Check to see if the MOS LQK version changed
after a firmware upgrade.
MOS LQK scores increase significantly
Voice quality metrics do not account for noise or distortion, only frame loss.
Note
Voice Quality Reporting
You can capture voice quality metrics for Voice over Internet Protocol (VoIP) sessions with a Session Initiation
Protocol (SIP) event package. Voice call quality information derived from RTP and call information from
SIP is conveyed from a User Agent (UA) in a session (reporter) to a third party (collector).
The Cisco IP phone uses User Datagram Protocol (UDP) to send a SIP PUBLISH message to a collector
server.
Supported Scenarios for Voice Quality Reporting
Currently, only the basic call scenario supports voice quality reporting. A basic call can be a peer to peer
incoming or outgoing call. The phone supports periodic SIP publish message.
Maintenance
5
Maintenance
Voice Quality Reporting

Cisco 8832 Specifications

General

Control type	Buttons
Display type	LCD
Product type	IP conference phone
Voice codecs	G.711a, G.711u, G.722, G.729A, G.729ab, OPUS, iLBC
Certification	CE Markings per directives 2014/30/EU and 2014/53/EU and 2014/35/EU \u2028 \u2028 UL 60950 Second Edition \u2028 CAN/CSA-C22.2 No. 60950 Second Edition \u2028 EN 60950 Second Edition (including A11 and A12) IEC 60950 Second Edition (including A11 and A12) EN 60950-1 IEC 60950-1 AS/NZS 60950.1 47CFR Part 15 (CFR 47) Class B AS/NZS CISPR32 Class B \u2028 CISPR32 \u2028Class B EN55032 \u2028 Class B EN 300 386 ICES003 Class B \u2028 VCCI Class B \u2028 EN61000-3-2 \u2028 EN61000-3-3 \u2028 EN61000-4-2 IEC61000-4-2 EN61000-4-3 IEC61000-4-3 EN61000-4-6 IEC61000-4-6 KN22 Class B \u2028 EN55024 \u2028 CISPR24 \u2028 KN24 Armadillo Light AS/ACIF S004 NZPTC220
Product color	Charcoal
Frequency range	100 - 20000 Hz
Built-in display	Yes
Display diagonal	3.9 \
Languages support	ARA, BUL, CAT, CHI (SIMPL), CHI (TR), CZE, DAN, DEU, DUT, ENG, ESP, EST, FIN, FRE, GRE, HEB, HUN, ITA, JPN, KOR, LAT, LIT, NOR, POL, POR, RUM, RUS, SER, SLK, SLV, SWE, TUR, UKR
Display resolution	480 x 128 pixels
Security algorithms	EAP-FAST, EAP-TLS, SHA-256, SSH
Ethernet LAN data rates	10, 100 Mbit/s
Ethernet interface type	Fast Ethernet
Supported network protocols	IPv4, IPv6, SIP, SDP, UDP, DHCP, GARP, TFTP, HTTPS, RTP, RTCP, Cisco Discovery Protocol, LLDP
Cables included	USB
Storage temperature (T-T)	-10 - 60 °C
Operating temperature (T-T)	0 - 40 °C
Storage relative humidity (H-H)	10 - 95 %
Operating relative humidity (H-H)	10 - 90 %
USB connector type	USB Type-C
RJ-45 ports quantity	1

Weight and Dimensions

Width	278 mm
Height	61 mm
Weight	1850 g