Calculating the RTP Port Range for Voice
Calculating the RTP Port Range for Voice
By default, the RTP port used for voice is 5004 i.e. IpTransportRtpBasePort = 5004
To calculate the RTP port range used for voice :
• RTP range min =IpTransportRtpBasePort
• RTP range max = IpTransportRtpBasePort + 4 * [Number of FXS ports] + 2 * [Number of FXO,
BRI or PRI channels] - 1 , or
• RTP range max = IpTransportRtpBasePort + 2 * [N] - 1 where
• N= 2* nbr of FXS ports + 2* nbr of BRI ports + nbr of FXO ports + 30 nbr of PRI E1 ports +
23 * nbr of PRI T1 ports + 24 * nbr of PRI T1 CAS ports
To calculate the RTP port range used for voice when SRTP and RTP are activated:
• RTP with SRTP range min = IpTransportRtpBasePort
• RTP with SRTP range max = IpTransportRtpBasePort+ 8 * [Number of FXS ports] 4 * [Number
of FXO, BRI or PRI channels] - 1, or
• RTP range max = IpTransportRtpBasePort + 4 * [N] - 1 where
• N= 2* nbr of FXS ports + 2* nbr of BRI ports + nbr of FXO ports + 30 nbr of PRI E1 ports +
23 * nbr of PRI T1 ports + 24 * nbr of PRI T1 CAS ports
Mitel TA7100 Series Port Range for Voice
Platform Interfaces # of FXS Ports
Port Range
(inclusively)
SRTP and RTP
activated Port
Range (inclusively)
TA7102 • 2 FXS 2 5004 to 5011 5004 to 5019
TA7104 • 4 FXS 4 5004 to 5019 5004 to 5035
TA7108 • 8 FXS 8 5004 to 6035 5004 to 5067