User Guide

3Com Router 5000 and Router 6000 Family Release Notes v2.41 • Page 15
• 3Com VCX 7000 phones do not support SIP outband mode. DTMF digits sent from router
5000/6000 to VCX phones will be disregarded.
• Removal of the Master SIP server from a voice configuration will remove the following from
the configuration:
o Slave SIP server if one exists
o “address sip proxy” for SIP VoIP entities
• Voice is barely audible when an NBX T1 is attached to the router configured running QSIG
master (network side). Voice quality is poor over a T1 link when the T1VI module is
configured for QSIG master (configured for ISDN network side.). QSIG master functions
correctly over E1 using the E1VI module.
• The “select-rule type-first” command under the voice/dial view includes an option for VoFR.
VoFR is not supported in this release. Make it the last choice in the select list.
• The “undo” command does not work for the mode command in the “controller/cas” view.
To reset the mode to the default value use the “mode itu-t” command.
• By default, voice entities with the same match criteria are chosen at random. To prioritize
VOIP entities use the command “select-rule type-first 213” command in the “voice/dial”
view.
• Voice activity detection (VAD) is only supported when the G.723 codec is used.
• CAS is not supported on the T1VI module.
• RADIUS authentication and accounting is not supported for H.323.
• Only voice traffic is supported on E1 and T1 voice cards. This applies to Router 5000 & 6000
platforms. Data traffic is not supported over Router 5000 and 6000 Voice cards.
• FIC Voice Cards are not hot-swappable; these cards must be inserted/removed with the
power off.
• A short static noise at the tail-end of the audio transmission is experienced when calls are
placed across Router 5000 and Router 6000 FXS cards.
• The steps to bind the voice MAX-CALL function to a voice entity described in the user guide,
is not clear. When configuring voice MAX-CALL you must apply this function inside the voice
entity view.
• FXS ports do not support modem operations.
• All busy signals on voice cards are the same type: fast-busy signal.
• One-Stage dialing through POTS may take up to 5 rings before rings are heard on the
remote side. Local ringing occurs before the remote side actually hears the rings.
• While accessing an outside line (two-stage dialing) the second dial tone takes a little longer
than normal to be heard; wait for the second dial tone before proceeding.
• Caller-ID Name is not supported; the router does not generate the names tied to a local
phone line.
• Analog voice quality is will be reduced when using analog lines across three or more routers.
• The user’s call forwarding option is not retained after a router reboot; the user must
reprogram the call forwarding option after a router reboot to ensure proper forwarding
operation.