AudioCodes Mediant 800B User Manual page 406

Parameter
Play RB Tone to IP
play-rbt-to-ip
[IpProfile_PlayRBTone2IP]
Early Media
early-media
[IpProfile_EnableEarlyMedia]
User's Manual
these G.711 coders is a standard one (8 for G.711 A-Law and 0 for
G.711 -Law). The parameters defining payload type for the 'old'
Bypass mode FaxBypassPayloadType and
ModemBypassPayloadType are not used with NSE Bypass. The
bypass packet interval is configured according to the
FaxModemBypassBasicRtpPacketInterval parameter.
The SDP contains the following line:
'a=rtpmap:100 X-NSE/8000'.
Notes:

When enabled, the following conditions must also be met:

The Cisco gateway must include the following definition:
'modem passthrough nse payload-type 100 codec
g711alaw'.

Set the Modem transport type to Bypass mode
(VxxModemTransportType is set to 2) for all modems.

Set the NSEPayloadType parameter to 100.

The corresponding global parameter is NSEMode.
Enables the device to play a ringback tone to the IP side for IP-to-
Tel calls.

[0] Disable (Default)

[1] Enable = Plays a ringback tone after a SIP 183 session
progress response is sent.
Notes:


To enable the device to send a 183/180+SDP responses, set
the EnableEarlyMedia parameter to 1.

If the EnableDigitDelivery parameter is set to 1, the device
doesn't play a ringback tone to IP and doesn't send 183 or
180+SDP responses.

Digital interfaces: If the parameter is enabled and
EnableEarlyMedia is set to 1, the device plays a ringback tone
according to the following:

CAS: The device opens a voice channel, sends a 183+SDP
response, and then plays a ringback tone to IP.

ISDN: If a Progress or an Alerting message with PI (1 or 8)
is received from the ISDN, the device opens a voice
channel, sends a 183+SDP or 180+SDP response, but
doesn't play a ringback tone to IP. If PI (1 or 8) is received
from the ISDN, the device assumes that ringback tone is
played by the ISDN switch; otherwise, the device plays a
ringback tone to IP after receiving an Alerting message from
the ISDN. It sends a 180+SDP response, signaling to the
calling party to open a voice channel to hear the played
ringback tone.

The corresponding global parameter is PlayRBTone2IP.
Enables the Early Media feature for sending media (e.g., ringing)
before the call is established.

[0] Disable (default)

[1] Enable

Digital: The device sends a SIP 18x response with SDP,
allowing the media stream to be established before the call
406
Mediant 800B Gateway and E- SBC
Description
Document #: LTRT-10296