Cisco 7941G Administration Guide

Usage NotesPurposeNetwork Protocol
Cisco Unified IP Phones use the RTP
protocol to send and receive real-time
voice traffic from other phones and
gateways.
RTP is a standard protocol for
transporting real-time data, such as
interactive voice and video, over data
networks.
Real-Time Transport
Protocol (RTP)
RTCP is disabled by default, but you can
enable it on a per phone basis by using
Cisco Unified Communications Manager.
RTCP works in conjunction with RTP
to provide Quality of Service (QoS)
data (such as jitter, latency, and round
trip delay) on RTP streams.
Real-Time Control
Protocol (RTCP)
SDP capabilities, such as codec types,
DTMF detection, and comfort noise, are
normally configured on a global basis by
Cisco Unified Communications Manager
or Media Gateway in operation. Some
SIP endpoints may allow these
parameters to be configured on the
endpoint itself.
SDP is the portion of the SIP protocol
that determines which parameters are
available during a connection between
two endpoints. Conferences are
established by using only the SDP
capabilities that are supported by all
endpoints in the conference.
Session Description
Protocol (SDP)
Like other VoIP protocols, SIP is
designed to address the functions of
signal and session management within a
packet telephony network. Signaling
allows call information to be carried
across network boundaries. Session
management provides the ability to
control the attributes of an end-to-end
call.
You can configure the Cisco Unified IP
Phones to use either SIP or Skinny Client
Control Protocol (SCCP). Cisco Unified
IP Phones do not support the SIP protocol
when the phones are operating in IPv6
address mode.
SIP is the Internet Engineering Task
Force (IETF) standard for multimedia
conferencing over IP. SIP is an
ASCII-based application-layer control
protocol (defined in RFC 3261) that
can be used to establish, maintain, and
terminate calls between two or more
endpoints.
Session Initiation
Protocol (SIP)
Cisco Unified IP Phones use SCCP for
call control. You can configure the Cisco
Unified IP Phone to use either SCCP or
Session Initiation Protocol (SIP).
SCCP includes a message set that
allows communications between call
control servers and endpoint clients
such as IP Phones. SCCP is proprietary
to Cisco.
Skinny Client Control
Protocol (SCCP)
Cisco Unified IP Phones use TCP to
connect to Cisco Unified
Communications Manager and to access
XML services.
TCP is a connection-oriented transport
protocol.
Transmission Control
Protocol (TCP)
Cisco Unified IP Phone 7941G, 7941G-GE, 7942G, 7961G, 7961G-GE, and 7962G Administration Guide for Cisco Unified
Communications Manager 9.0 (SCCP and SIP)
9
Cisco Unified IP Phone
Network Protocols

Cisco 7941G Specifications

General

Keypad number of keys	12
Touchscreen	-
Display resolution	320 x 222 pixels
Speakerphone	Yes
Voice codecs	G.729a
Bluetooth	No
Supported network protocols	DHCP, TFTP, SCCP, DSCP
Ethernet LAN (RJ-45) ports	2
Input voltage	48 V
Dimensions (WxDxH)	266.7 x 152.4 x 203.2 mm
Storage temperature (T-T)	-10 - 60 °C
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	10 - 95 %
Handset type	Wired handset
Product type	IP Phone
Product color	Gray
Safety	(UL) 60950, (CSA) C22.2 No. 60950, IEC 60950, EN 60950, AS/NZS 60950
Certification	CE (FCC) 15 (CFR 47) B ICES-003 B EN55022 B CISPR22 B AS/NZ 3548 B VCCI B EN55024 EN 50082-1 EN 61000-3-2 EN 61000-3-3
Compliance industry standards	IEEE 802.3, IEEE 802.3u, IEEE 802.1Q, IEEE 802.3af
Lines quantity	- lines
Phonebook capacity	- entries
Number of handles included	1 pc(s)

Weight and Dimensions

Weight	1600 g