AudioCodes MediaPack Series MP-11x User Manual

User's Manual 512 Document #: LTRT-65417
MP-11x & MP-124
Parameter Description

[1] = Enable
EMS: Options User Part
[OPTIONSUserPart]
Defines the user part value of the Request-URI for outgoing SIP
OPTIONS requests. If no value is configured, the endpoint number is
used.
A special value is ‘empty’, indicating that no user part in the Request-
URI (host part only) is used.
The valid range is a 30-character string. The default value is an empty
string (‘’).
Web: Fax Signaling
Method
EMS: Fax Used
[IsFaxUsed]
Determines the SIP signaling method for establishing and transmitting a
fax session after a fax is detected.
 [0] No Fax = (Default) No fax negotiation using SIP signaling. Fax
transport method is according to the parameter FaxTransportMode.
 [1] T.38 Relay = Initiates T.38 fax relay.
 [2] G.711 Transport = Initiates fax/modem using the coder G.711 A-
law/Mu-law with adaptations (see Note below).
 [3] Fax Fallback = Initiates T.38 fax relay. If the T.38 negotiation
fails, the device re-initiates a fax session using the coder G.711 A-
law/µ-law with adaptations (see the Note below).
Notes:
 Fax adaptations (for options 2 and 3):

Echo Canceller = On

Silence Compression = Off

Echo Canceller Non-Linear Processor Mode = Off

Dynamic Jitter Buffer Minimum Delay = 40

Dynamic Jitter Buffer Optimization Factor = 13
 If the device initiates a fax session using G.711 (option 2 and
possibly 3), a 'gpmd' attribute is added to the SDP in the following
format:

For A-law: 'a=gpmd:8 vbd=yes;ecan=on'

For µ-law: 'a=gpmd:0 vbd=yes;ecan=on'
 When this parameter is set to 1, 2, or 3, the parameter
FaxTransportMode is ignored.
 When this parameter is set to 0, T.38 might still be used without the
control protocol's involvement. To completely disable T.38, set
FaxTransportMode to a value other than 1.
 This parameter can also be configured per IP Profile (using the
IPProfile parameter).
 For more information on fax transport methods, see 'Fax/Modem
Transport Modes' on page 145.
[HandleG711asVBD]
Enables the handling of G.711 as G.711 VBD coder.
 [0] = (Default) Disable. The device negotiates G.711 as a regular
audio coder and sends an answer only with G.729 coder. For
example, if the device is configured with G.729 and G.711 VBD
coders and it receives an INVITE with an SDP offer containing G.729
and “regular” G.711 coders, it sends an SDP answer containing only
the G.729 coder.
 [1] = Enable. The device assumes that the G.711 coder received in
the INVITE SDP offer is a VBD coder. For example, if the device is
configured with G.729 and G.711 VBD coders and it receives an
INVITE with an SDP offer containing G.729 and “regular” G.711
coders, it sends an SDP answer containing G.729 and G.711 VBD
coders, allowing a subsequent bypass (passthrough) session if

AudioCodes MediaPack Series MP-11x Specifications

General

Brand	AudioCodes
Model	MediaPack Series MP-11x
Category	Gateway
Language	English