Cisco Linksys SPA9000 - Manual (Page 120)

4-30
Linksys SPA9000 Administrator Guide
Document Version 3.01
Chapter 4 Configuring SPA9000 Features
Music On Hold
• Using a Streaming Audio Server, page 4-30
• Using the IVR with an SAS Line, page 4-30
• Example SAS with MOH, page 4-31
• Configuring the Streaming Audio Server, page 4-32
Using a Streaming Audio Server
On a connected call, the SPA9000 may place the remote party on hold by performing a hook-flash to
initiate a three-way call or by swapping two calls during call-waiting. If the remote client indicates that
it can still receive audio while the call is holding, the SPA9000 can be configured to contact an
auto-answering streaming audio server (SAS) to stream audio to the holding party. When used this way,
the SAS is referred to as an MOH Server.
The SAS feature lets you use attach an audio source to one of the SPA9000 FXS ports (Phone 1 or Phone
2 on the PAP2T) and use it as a streaming audio source device.
If the SPA9000 has multiple FXS ports,
either or both of the associated lines (Line 1 and Line 2 on the PAP2T) can be configured as an SAS
server .
When the line is called and the FXS port is off hook, the SPA9000 answers the call automatically and
streams audio to the calling party.
If the FXS port is on-hook when the incoming call arrives, the SPA9000 replies with a SIP 503 response
code to indicate “Service Not Available.” If an incoming call is auto-answered, but later the FXS port
changes to on-hook, the SPA does not terminate the call but continues to stream silence packets to the
caller. If an incoming call arrives when the SAS line has reached full capacity, the SPA replies with a
SIP 486 response code to indicate “Busy Here.”
The SAS line can be setup to refresh each streaming audio session periodically using a SIP re-INVITE
message, which detects if the connection to the caller is down. If the caller does not respond to the
refresh message, the SAS line terminates the call so that the streaming resource can be used for other
callers.
Each SAS server can maintain up to five simultaneous calls. If the second line on the SPA9000 is
disabled, then the SAS line can maintain up to 10 simultaneous calls. Further incoming calls will receive
a busy signal (SIP 486 Response).
The streaming audio source must be off-hook for the streaming to occur. Otherwise incoming calls will
get a error response (SIP 503 Response). The SAS line will not ring for incoming calls even if the
attached equipment is on-hook.
If no calls are in session, battery is removed from tip-and-ring of the FXS port. Some audio source
devices have an LED to indicate the battery status. This can be used as a visual indication as to whether
audio streaming is in progress.
Set up the Proxy and Subscriber Information for the SAS Line as you normally would with a regular user
account.
Call Forwarding, Call Screening, Call Blocking, DND, and Caller-ID Delivery features are not available
on an SAS line.
Using the IVR with an SAS Line
The IVR can still be used on an SAS line, but the user needs to follow the following steps: