Telephone User Manual

IP Telephony and QSIG Over IP
CTX IP Troubleshooting
9-34 Strata CTX I&M 06/04
Capture Packets
Packet types to be captured are:
The following is the port number used by each protocol. This is useful for filtering captured data.
RAS (Registration, Admission and Status)
MEGACO+
RTP/RTCP
FTP/FTP-data
DHCP
Protocol Name Type Use, Purpose
RAS (H.225) udp for searching BIPU and registering IPT with the system
MEGACO+ tcp call control protocol
RTP udp carry the voice data
RTCP udp
control RTP
System uses this protocol to measure the round-trip delay of rtp packets
between BIPU and IPT (currently unavailable).
SNMP udp get/set CTX data from CTX WinAdmin
FTP tcp to download updating file when updating the BIPU/IPT program.
FTP-data tcp to download updating file when updating the BIPU/IPT program.
DHCP udp request to lease an IP address (IPT only)
IP-QSIG tcp encapsulate QSIG message over IP network
IPT BIPU
Discovery (GRQ, GCF, GRJ) 1718 1718
Registration (RRQ, RCF, RRJ) 1719 1719
IPT BIPU
random 2944
IPT BIPU
RTP 1500 X (11000 – 13000). Always an even number.
RTCP 1501 X+1. Always an odd number.
BIPU (FTP client) FTP server
FTP
1024 (initial)
1026 (retry)
21 (well-known)
FTP-data
1025 (initial)
1027 (retry)
20 or any port (Depends
on server implementation)
DHCP server DHCP client (IPT)
67 68