Siemens 410 S, 420 S >

c01.fm

30. June 2006

optiPoint 410/420 - Using with Asterisk, Configuration Guide 17

Multi Line

SIP Environment

Voicemail number

Specifies the number to reach the voicemail feature of Asterisk. This complies with the exten-

sion specified for the feature VoiceMailMain() in the file extensions.conf.

During setup, a phone number - or alternatively: a name - is assigned to the telephone; this

number or name can be used to call this telephone and is used at the called party’s side to iden-

tify the caller.

Very often this is referred to as a (telephone) "line" the telephone is assigned to - in analogy to

conventional (TDM) telephones using phone numbers.

In addition, powerful telephones support the so-called "Multi Line" feature. This feature enables

one end device to have access to several lines. Apart from that, one line can be assigned to

several end devices. If a call comes in on such a shared line, this triggers a ringing tone on all

end devices assigned to that line. Depending on the model, optiPoint 410 S / 420 S can attend

to up to 10 lines.

If you want to use the Multi Line feature with Asterisk, the parameter pedantic=yes has to be

set in the file sip.conf; this ensures that Asterisk can identify the Multi Line Header in the SIP

messages (presetting is no).

The lines are not configured in the SIP environment section but using the key programming of

the optiPoint telephone. For each line one function key has to be configured as "line" key. User

data such as E.164 number, user name and password have to be entered. The LED belonging

to the line key indicates the status of that line. For more information about functionality and set-

up, please refer to the User Guide and the Administrator Guide (see Section 9, "Reference

List").

For each line on the end device there has to be a corresponding entry in the file sip.conf. The

server settings have to be entered in the section SIP environment.

>As Asterisk Version 1.2.7 has some problems with forking, Multi Line with several

user agents (shared line) are not yet possible. So far, only one user agent can be

connected per line. However, Digium is already working on improving forking sup-

port.