AudioCodes Mediant 500 MSBR, Руководство пользователя

Страница: 441 / 1248

Version 7.2 441 Mediant 500 MSBR
User's Manual 23. Coders and Profiles
Tel Profile Parameter Global Parameter
Index
[TelProfile_Index]
Defines an index number for the new table row.
Note: Each row must be configured with a unique index.
Name
profile-name
[TelProfile_ProfileName]
Defines a descriptive name, which is used when associating
the row in other tables.
The valid value is a string of up to 40 characters.
Signaling
Profile Preference
tel-preference
[TelProfile_TelPreference]
Defines the priority of the Tel Profile, where 1 is the lowest
priority and 20 the highest priority.
Note:

If both the IP Profile and Tel Profile apply to the same
call, the coders and common parameters of the Preferred
profile are applied to the call.

If the Preference of the Tel Profile and IP Profile are
identical, the Tel Profile parameters are applied.

If the coder lists of both the IP Profile and Tel Profile
apply to the same call, only the coders common to both
are used. The order of the coders is determined by the
preference.
Fax Signaling Method
fax-sig-method
[TelProfile_IsFaxUsed]
Defines the SIP signaling method for establishing and
transmitting a fax session when the device detects a fax.

[0] No Fax = (Default) No fax negotiation using SIP
signaling. The fax transport method is according to the
FaxTransportMode parameter.

[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/Mu-law with adaptations
(see the Note below).
Note:

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
or 3), a 'gpmd' attribute is added to the SDP in the
following format:

For A-law: 'a=gpmd:8 vbd=yes;ecan=on'

For Mu-law: 'a=gpmd:0 vbd=yes;ecan=on'

When the parameter is set to 1, 2, or 3, the parameter
FaxTransportMode is ignored.

When the 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.