NEC SL1100 Features And Specifications Manual page 438

SL1100
Port
10020 ~ 10083 (UDP)
Port forwarding does not need to be assigned at the Remote Terminal locations.
• DR700 terminal Setting of "NAT Traversal Mode" needs "Dynamic". "Static" is unsupported.
• Port Forwarding setting to system side Router A is necessary.
• When PRG 15-05-45 is set to 1 the manual table setting for port forwarding is unnecessary at
remote side Router B, but it needs NAT function setting itself. If PRG 15-05-45 is set to 0 then port
forwarding at the Remote side router is required.
• Depend on the router it may close the port being used if packet exchange is not performed during a
I
certain time frame. In this case change PRG 84-23-01 and PRG 84-23-02 to a shorter interval.
• SIP ALG function of ALL routers in the network must be disabled.
• If there is excessive packet loss on the network, IP phones will play a warning tone during
conversations. To disable this tone set PRG 15-05-31 to "0".
• Multicast RTP is not supported.
• Peer to Peer is possible only between the IP Terminals under the same router.
• After starting SIP negotiation for the call if any RTP packet can't be received from the terminal within
10 seconds, the call is dropped and IP Terminal indicates below notice on the LCD.
Peer to Peer
An IP Terminal can send and receive RTP packets to/from another IP Terminal without using the DSP
resources on the VoIPDB. This operation only allows intercom calls between the IP Terminals.
If a digital multiline terminal or trunk is part of the call a DSP resource on the VoIPDB is required. If,
while on a peer to peer call, a conference call is initiated, the peer to peer connection is released and
a new non peer to peer connection is created using the VoIPDB. If the third party drops out of the
conversation, the call reverts to a peer to peer call (silence may be heard while this conversion is
made by the system).
Although the peer to peer feature is supported for IP Station-to-IP Station calls, the SL1100 KSU must
still have a registered VoIPDB installed in the system.
With Barge-In, a short silence may be heard if the following occurs:
• A peer to peer call receives a Barge-In without a Barge-In tone.
• A peer to peer call receives a Barge-In with Monitor mode.
• When the established Barge-In is disconnected.
• Peer to peer is a programmable feature that may be enabled or disabled (PRG 10-26-01).
System Tones and Ring Tones
IP Terminals do not use PRG 80-01: Service Tone Setup entries. The tones are generated locally by
the IP Terminal. When a Door Box chime rings an IP Terminal, the system activates the chimes using
a ring command. Because of this, if the volume is adjusted while the door chime is sounding, the
ringing volume of the IP Terminal is also adjusted.
Music on Hold
1-426
IP Address Port is
Forwarded To
172.16.0.20 Voice ports and must be forwarded to the IP Address assigned in PRG
84-26-01
1-4 FRI 8:53PM
Can't send RTP packets
List
Remark
Dir ICM
ISSUE 2.0
IP Multiline Station (SIP)