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CONNECT <src_type>:<src_stream>:<src_idx>:[opt] <dst_type>:<dst_stream>:<dst_idx>:[opt]

This command establish a simplex cross-connect between an incoming and outgoing stream. To do a duplex connection, one more connection needs to be done separately.

The fields are:

  • src_type, dst_type:

RTP (RTP connection), TDM (TDM cross-connect), TDMOE (Pseudowire cross-connect)

  • src_stream, dst_stream:

For RTP: IP-address, for TDM: Span number

  • src_idx, dst_idx:

For RTP: Port number (local/remote), for TDM: Timeslot

  • opt:

Usually src_codec, dst_codec are voice codec used for the specified stream end, e.g. alaw (or g711a), ulaw (or g711u), g729, g723, g726, etc.

Note: If src_codec and dst_codec parameters are not specified, they take the default value. Currently the default codec is alaw. For the incoming RTP data src_codec can be overridden by the payload type of RTP packet.

The abbreviations are: src is source, dst - destination, li - span, ts – timeslot, codec - codec name, ip – IP-address, r_port – remote port number, l_port – local port number.

For span and timeslot parameters several formats are supported; you can skip li, ts abbreviations and specify only span and timeslot numbers.

li0:ts5 or 0:5

Below there are several examples of the CONNECT command with some description:

1. TDM -> TDM Mode

connect tdm:<src_li#>:<src_ts#>[:src_codec] tdm: <dst_li#>:<dst_ts#>[:dst_codec]


connect tdm:li0:ts5:ulaw tdm:li1:ts10:alaw

Note: src_codec and dst_codec will be used as a default TDM codec type specified in the default configuration settings.

2. RTP -> TDM Mode

connect rtp:<src_ip>:<src_remote_port>:<src_local_port>[:src_codec] tdm: <dst_li#>:<dst_ts#>[:dst_codec]


connect rtp: tdm:li0:ts10:alaw

Note: Omitted src_codec will be set according to the incoming RTP payload type automatically. Omitted dst_codec will be substituted by the default RTP stream encoder codec.

3. TDM -> RTP Mode

connect tdm:<src_li#>:<src_ts#>[:src_codec] rtp:<dst_ip>:<dst_remote_port>:<dst_local_port>[:dst_codec]


connect tdm:li0:ts10:alaw rtp:

4. RTP -> RTP Mode

connect rtp:<src_ip>:<src_remote_port>:<src_local_port>[:src_codec] rtp:<dst_ip>:<dst_remote_port>:<dst_local_port>[:dst_codec]


connect rtp: rtp:

5. N64 Streaming

connect tdmli:<src_li#>[:format] tdmop:<dst_ip>:<dst_remote_port>:<dst_local_port>
connect tdmop:<src_ip>:<src_remote_port>:<src_local_port> tdmli:<dst_li#>[:format]

The abbreviations are:

  • src_li, dst_li: source/destination E1/T1 span
  • src_ip, dst_ip: source/destination IP-address
  • src_remote_port, dst_remote_port: source/destination
  • src_local_port, dst_local_port: source/destination local port number
  • format - defines which timeslots to send/receive; can take following values:
    • number from 1 to 32 (32 connects 0-31 timeslots, 31 connects 1-31 timeslots, 30 connects 2-31 timeslots, etc)
    • string ‘raw’ (connects 0-31 timeslots)
    • mask [ts1,ts2,ts3,…] (defines the list of timeslots to connect)


connect tdmli:0:mask[3,7,11] tdmop:

Note: If format is not declared, timeslots 1-31 are connected.

Note: With the Alvis-PCIe unit you can use only RTP -> RTP connection mode.

Also you can use the connection command with a conference mode. For more information see Multi-conferences support.

6. TDMoE

connect tdmli:<src_li#> tdmloe:linkid:<src_iface>:<dst_mac>:chunk
connect tdmloe:<linkid>:<src_iface>:<dst_mac>:chunk tdmli:<src_li#>


#For Li0
connect tdmli:0 tdmoe:0:eth0:f4:6d:04:63:b1:82:8 
connect tdmoe:0:eth0:f4:6d:04:63:b1:82:8 tdmli:0
#For Li1
connect tdmli:1 tdmoe:1:eth0:f4:6d:04:63:b1:82:8 
connect tdmoe:1:eth0:f4:6d:04:63:b1:82:8 tdmli:1