The Cisco Analogue Telephone Adaptor (ATA) 191 Multi-platform Analogue Telephone Adapter turns traditional telephone, fax machine and overhead paging communications devices into IP phones and devices. Ideal for customers with enterprise networks, small offices and Unified Communications as a Service (UCaaS) from the cloud, this IP phone adapter is a great fit for daily use while protecting your analogue investments with transition to IP networks.

Ports & interfaces
Ethernet LAN (RJ-45) ports	1
Modem (RJ-11) ports	2
Weight & dimensions
Dimensions (WxDxH)	100 x 100 x 28 mm
Weight	132.1 g
Package weight	498.87 g
Package depth	245.1 mm
Package width	153.9 mm
Package height	64 mm
Operational conditions
Operating temperature (T-T)	0 - 40 °C
Storage temperature (T-T)	-10 - 60 °C
Operating relative humidity (H-H)	10 - 90%
Storage relative humidity (H-H)	10 - 95%
Protocols
VoIP protocols	SIP
Supported network protocols	TCP, UDP, RTP, HTTP, ARP, RTCP, ICMP, LLDP
Management protocols	SNMPv3
Network
DHCP client	Yes
Web-based management	Yes
Quality of Service (QoS) support	Yes
Security
Security algorithms	AES, HTTPS, SSH
DMZ support	Yes
Call management
Caller ID	Yes
Conference call	Yes
Call waiting	Yes
Features
Voice codecs	G.711Mu, G.711a, G.726, G.729A, G.729ab
Fax compatibility	T.38
Noise reduction	Yes
Reset button	Yes
LED indicators	Yes
Power LED	Yes
Safety	UL 60950 Second Edition, CAN/CSA-C22.2 No. 60950 Second Edition, IEC 60950-1:2005 (Second Edition) + A1:2009 + A2:2013 and/or AS/NZS 60950.1:2015
Certification	CE Markings per directives 2014/30/EU and 2014/35/EU
Logistics data
Country of origin	China
Quantity per pack	1 pc(s)
Harmonized System (HS) code	85177900