VoIP: SIP-over-TLS and sRTP: iPECS

iPECS is part of Ericsson-LG Enterprise, former LG-Ericsson, former LG-Nortel, former Goldstar Communication, part of LG Electronics and Ericsson, see their history. iPECS has several desk-phone series, some using an own VoIP protocol called IPKTS: LIP-90xx series. The latest generation of SIP compatible phones is not even advertised on their Webpage: LIP-98xx series.

Last tested firmware

1.1.02

Configuration

Phone Password: 22222
Web Password: user/lip
Web → Phone Configuration → System
HTTPS: enabled on default; HTTP listens not on port 80 but 8000
Update: Web → Firmware update
on default, automatic updates are enabled
Trust Anchors: requires a private key, signed by the same trust anchor as your server
not possible via the Web interface, requires provisioning
SIP-URI User: Web → VoIP Line → Account
Web → VoIP Line → Authentication Name
SIP-URI Host: Web → VoIP Line → Server Address
SIP-over-TLS: Web → VoIP → Transport Mode → TLS
does not start without private key (see Trust Anchors)
SDES-sRTP: Web → VoIP → SRTP → Activation: Enable
Web → VoIP → SRTP → SRTP-Only: Disable
which is RTP/SAVP + RTP/AVP

Software Bugs

SHA-2 Digest: does not pick MD5, continues without header Authorization, therefore is not able to register; therefore incompatible with Linphone
Audio DiffServ: not enabled on default
Mitigation: Web → QoS → ToS for Voice Data: 0xb8
Signaling DiffServ: SIP uses the same as RTP; menu item in Web interface has no effect

Security

Bugs: padlock icon even without SIP-over-TLS
requires a private key signed by the same trust anchor as your server
Responsible Disclosure: via PSIRT team
Firmware Update: not available for end-users
missing Automation

Miscellaneous

Model Range

In some countries, the platform is called LIP-98xx or IP-9800. In the United States, the company Vertical sells them via their brand Wave VIP, for example, Edge 9800 Series IP Phones. Other phone series like the LIP-9000 do not offer SIP. The LIP-9871 must be reset to choose between IPKTS or SIP.

Power Supply

48 V 0.3 A, Coaxial: 5.5 mm × 2.1 mm

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