Version 7.2 585 Mediant 1000B Gateway & E-SBC
User's Manual 27. Configuring Supplementary Services
27.7 Enabling Call Waiting
The Call Waiting feature enables busy FXS endpoints connected to the device to accept an
additional (second) call. If an incoming IP call is designated to a busy port, the called FXS
endpoint hears a call waiting tone (several configurable short beeps) and can view the
Caller ID of the incoming call (for Bellcore and ETSI Caller IDs). The calling party hears a
call waiting ringback tone. The called party can accept the new call using hook-flash and
can toggle between the two calls. To indicate call waiting, the device sends a SIP 182 (Call
Queued) response. The device identifies call waiting when a 182 (Call Queued) response
is received.
Note:
• The feature is applicable to FXS and FXO interfaces. FXS interfaces support the
calling and called sides; FXO interfaces support only the calling side.
• You can enable call waiting per port in the Call Waiting table (see ''Configuring
Call Waiting'' on page 627). For ports that are not configured in the table, call
waiting is according to the global parameter, as described in the procedure below.
To enable and configure call waiting:
1. Open the Supplementary Services Settings page (Setup menu > Signaling & Media
tab > Gateway folder > DTMF & Supplementary > Supplementary Services
Settings).
Figure 27-7: Configuring Call Waiting
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