4 iptel.org SIP Express Router (ser)
5 http://www.iptel.org/ser/
9 I. About SIP Express Router (ser)
13 V. Contact, Licensing and More Information
16 SIP Express Router (SER) is an industrial-strength, free VoIP
17 server based on the session initiation protocol (SIP RFC2543-bis).
18 It is engineered to power IP telephony infrastructures up to large
19 scale. The server keeps track of users, sets up VoIP sessions,
20 relays instant messages and creates space for new plug-in
21 applications. Its proven interoperability guarantees seamless
22 integration with components from other vendors, eliminating the
23 risk of a single-vendor trap. It has successfully participated in
24 various interoperability tests in which it worked with the products
25 of other leading SIP vendors.
27 The SIP Express Router enables a flexible plug-in model for new
28 applications: Third parties can easily link their plug-ins with
29 the server code and provide thereby advanced and customized
30 services. In this way, plug-ins such as SNMP support, RADIUS
31 accounting, or SMS gateway have already been developed and are
32 provided as advanced features. Other modules are underway:
33 Presence server, firewall control, and more.
35 Its performance and robustness allows it to serve millions of users
36 and accommodate needs of very large operators. With a $3000 dual-CPU,
37 the SIP Express Router is able to power IP telephony services in an
38 area as large as the Bay Area during peak hours. Even on an IPAQ PDA,
39 the server withstands 150 calls per second (CPS)! The server has been
40 powering our iptel.org free SIP site withstanding heavy daily load
41 that is further increasing with the popularity of Microsoft's
44 The SIP Express Router is extremely configurable to allow the creation
45 of various routing and admission policies as well as setting up new
46 and customized services. Its configurability allows it to serve many
47 roles: network security barrier, application server, or PSTN gateway
53 Based on the latest standards, the SIP Express Router (SER) includes
54 support for registrar, proxy and redirect mode. Further it acts as
55 an application server with support for CPL, instant messaging and
56 presence (IM&P) including a 2G/SMS gateway, a call control policy
57 language, call number translation, private dial plans and accounting,
58 authorization and authentication (AAA) services. SER runs on Sun/
59 Solaris, PC/Linux, IPAQ/Linux platforms and supports both IPv4 and
62 Most of SER features are implemented as plug-in modules. See
63 README-MODULES for a description of modules available in
69 iptel.org is a know-how organization spun off from Germany's national
70 research company FhG Fokus. One of the first SIP implementations ever,
71 low-QoS enhancements, interoperability tests and VoIP-capable firewall
72 control concepts are examples of well-known FhG's work.
74 iptel.org continues to keep this know-how leadership in SIP.
75 The access rate of the company's site, a well-known source of
76 technological information, is a best proof of interest. Thousands
77 of hits come every day from the whole Internet.
81 We offer best-effort free support for ser. "best-effort" means
82 that we try to solve your problems via email as soon as we can,
83 subject to available manpower. If you need commercial support,
84 contact info@iptel.org.
86 To receive feedback to your inquiries, we recommend you to subscribe
87 to the serusers mailing list and post your queries there. This mailing
88 list is set up for mutual help by the community of ser users and developers.
89 To participate in the mailing list, subscribe at the following web address:
90 http://mail.iptel.org/mailman/listinfo/serusers.
91 Send your questions to
94 If you are concerned about your privacy and do not wish your queries
95 to be posted and archived publicly, you may post to
97 E-mails to this address are only forwarded to iptel.org's ser development
98 team. However, as the team is quite busy you should not be surprised to
99 get replies with considerable delay.
101 V. Contact, Licensing and More Information
103 For any additional information, send an inquiry to info@iptel.org.
104 Licensing conditions other than GPL are available on request.
106 Most up-to-date information is always available at our website,
107 http://www.iptel.org/ser/
109 Particularly, it includes:
110 - administrator's guide
111 - installation guidelines (INSTALL)
113 - list of known issues (ISSUES)