AltiGen MAXCS 7.5 New Features Guide - Manual (Page 16)

MaxCS 7.5 New Features Guide Page 16 of 22
• Improved system performance, because no MIPS is required for codec processing
• Improved voice quality, because no distortion is introduced by additional compressed codecs
• Reduced voice latency, because it eliminates the delay introduced by codec and jitter buffer processing
In addition to benefits to direct calls, pass-through applies during call recording, silent monitoring, and coaching.
Pass-through is enabled by default. To disable it, modify the statement in this file:
..\Altiserv\SP\HMP\HMPSP.xml
The system will reset the HMCP board so that the setting can take effect.
Notes:
• RTP headers are reconstructed before forwarding the packets to the target channel
• Allow SRTP enabled on one leg and disabled on another
• Require encryption/decryption processing if SRTP is enabled
• No Media pass-through support for playing and conference media streams
Conditions Not Supported
Media pass-through cannot support all conditions in the HMCP system, even if both connected channels are using
same codec. The following MAXCS features do not supported media pass-through:
• Call playing: The trunk call playing must use encoder and decoder on RTP channel
• Conference calls – All RTP channels in a conference bridge must be encoded and decoded voice
T.38 Pass-through
T.38 is a standard for real-time fax transmission over IP networks. T.38 Pass-through relays two T.38 sessions
between the SIP trunk and MAXCS and MAXCS gateway.
• T.38 pass-through is not supported on hardware chassis deployments
• T.38 pass-through is supported only on systems using AltiGen-provided SIP trunks
• T.38 pass-through is supported on these ATA devices: AudioCodes MP-202, MP-11x, and MP-124
See the next two sections for enabling FoIP for extensions and In Call routing.
Fax-over-IP (FoIP) Extensions
Release 7.5 supports Fax-over-IP (FoIP), leveraging T-38 pass-through. Both voice calls and fax calls can be made
through a FoIP extension; both incoming and outgoing calls on the extension will use G.711 codec.
Fax extension-to-extension is supported; the SIP endpoints must be a supported ATA device.
Limited FoIP extension parameters are supported:
• First/Last Name, Password, Description, Department
• DID Number, Transmitted Caller ID, E911 CID
• IP Extension parameters, except Enable Fallback to Mobile Extension
• Out Call Restrictions