HDLC-UDP

Connects HDLC-to-UDP

Assume we have an HDLC/SS7 signalling coming from some TDM E1/T1 timeslots and it is needed to send the decoded HDLC messages out using the UDP transport. It is possible to send the decoded HDLC messages from an individual E1/T1 timeslots using the Command CONNECT.

Command syntax Description

connect hdlc:li<E1T1_span_number>:ts<timeslot_number>[:filter(hdlc_filters_list)] udp:<ip_addr>:<remote_port>:<local_port>

Fields:

RX Part (TDM E1/T1):

E1T1_span_number - E1/T1 Span Number, from 0 ... N-1, N=2 for the Alvis-CSI-2 or N=4 for the Alvis-CSI-4;

timeslot_number - TDM E1/T1 Timeslot Number, 0 ... 31;

hdlc_filters_list - can be no or comma-separated list of values: fisu, fisuall, lssu, lssuall, shortlssu, shortlssuall, longlssu, longlssuall, msu:

no: there is no any HDLC filter for the connection (all MTP SS7 messages will be sent to the remote host);

fisu: repeating FISUs will be filtered;

fisuall: all FISUs will be filtered;

lssu: repeating LSSUs will be filtered;

lssuall: all LSSUs will be filtered;

shortlssu: repeating short LSSUs will be filtered;

shortlssuall: all short LSSUs will be filtered;

longlssu: repeating long LSSUs will be filtered;

longlssuall: all long LSSUs will be filtered;

msu: all MSUs will be filtered.

By default (if there are no HDLC filters set) filter(fisu,lssu) is used (repeating FISUs and LSSUs are filtred). To change default HDLC filter use command hdlcfilter.

TX Part (UDP):

ip_addr - Outgoing UDP Connection IP Address of the Remote Host;

remote_port - Outgoing UDP Connection port of the Remote Host;

local_port - A port that RtpBridge will be sent out to.

Simple Example

   connect hdlc:li0:ts1 udp:192.168.1.10:12000:4000

In this example the hdlc signalling coming from E1/T1 span Li#0, Timeslot 1 will be sent over UDP to the remote host 192.168.1.10 to the port 12000 from the local RtpBridge port 4000. Default HDLC filter is used (repeating FISUs and LSSUs are filtred).