User guide

6-145
Cisco Media Gateway Manager 5.0 User Guide
OL-5461-02
Chapter 6 Configuring Hardware
How Do I Configure VISM-PR Cards?
RTP Receive Timer Defines whether the RTP packets receive timer on the VISM needs to be
enabled or not.
DTMF Relay Defines whether the Dual Tone, Multi-Frequency digits need to be transported
to the other endpoint via Named Signal Event (NSE) packets.
CAS Transport Defines whether the CAS (ABCD) bits need to be transported to the other
endpoint via NSE packets.
Triple Redundancy
Enable
Indicates whether triple redundancy is enabled or disabled.
NTE Negotiation
Enable
Defines whether VISM has the capability to negotiate the list of events either
NSE or NTE (Named Telephony Events) using rtp map and fmtpmap in the
SDP.
Payload Type of RTP
Packet
Sets the payload type of a RTP packet carrying SID which is sent to the other
end when silence is detected.
Dual PVC OAM Cell
Gap
Defines the inter cell gap for dual PVC OAM cells in milliseconds.
PVC Failure
Threshold
Threshold for failure of a PVC. If the number of consecutive OAM cells sent
for which no ack was received equals this number, then the connection is
considered to be failed.
PVC Recovery
Threshold
Threshold for recovery of a PVC. If the number of consecutive OAM cells sent
for which no ack was received equals this number, then the connection is
considered to be recovered from failure.
RTCP Interval
Multiplier
Defines how many times the RTCP reports may fail before exception
condition activity may be done.
LAPD Trunk PVC Used for VoIP trunking applications, only if the signalling type is CCS. By
default, the PRI-D channel information will be sent on the control channel. If
the control network is totally separated from the bearer network, then you
need to set this object to “bearer” to send LAPD trunk messages to the remote
VISM.
VAD Timer Hangover time for VAD in milliseconds. Once voice inactivity is detected, the
gateway waits for this duration before activating silence suppression.
Table 6-71 Field Descriptions for the VISM-PR Media Gateway Tab, VoIP Parameters Option
(continued)
Field Name Description