Configuration Description

In some cases, more FXS, FXO or BRI ports are needed as available on one SmartNode for certain applications. This conifg example shows, how to stack two or more SmartNodes, achieving more channels / ports.
The idea is to let the "Master" SmartNode handle all calls. It communicates with the SIP server and distinguishes calls to the slave SN over the second ethernet port (LAN) in case all TDM channels are occupied. The service hunt-group is in charge of this. ISDN ports, 0/0 on both SmartNodes are used for clock sync, while a PSTN line is plugged.
IP network which connects the two SmartNodes is 192.168.20.0/24. There is no SIP call authentication between the two SmartNodes. Please make sure you set and replace all values which are commented as below with #.

Command Sequence to copy, edit and paste

MASTER SN46XX
-------------
#----------------------------------------------------------------#
#                                                                #
# SN4638 MASTER                                                  #
# R5.T                                                           #
# 2010-05-12                                                     #
# Author M. Aeberhard                                            #
#                                                                #
#----------------------------------------------------------------#

cli version 3.20
banner
# enter below the DNS server IP
dns-client server [dns-serverIP]
dns-relay
webserver port 80 language en
sntp-client
sntp-client server primary swisstime.ethz.ch port 123 version 4
system hostname MASTER_SN

system

  ic voice 0
    low-bitrate-codec g729

system
  clock-source 1 bri 0 0

profile napt NAPT_WAN

profile ppp default

profile tone-set default

profile voip default
  codec 1 g711alaw64k rx-length 20 tx-length 20
  codec 2 g711ulaw64k rx-length 20 tx-length 20
  fax transmission 1 relay t38-udp
  modem transmission 1 bypass g711alaw64k
  modem bypass-method nse

profile pstn default

profile sip default

profile dhcp-server DHCP_LAN

profile aaa default
  method 1 local
  method 2 none

context ip router

  interface IF_WAN
    ipaddress dhcp
    use profile napt NAPT_WAN

  interface IF_LAN_VOIP
    ipaddress 192.168.20.1 255.255.255.0

context cs switch

  routing-table called-e164 RT_DIGIT_COLL
    route .T dest-interface IF_SIP_DEFAULT

  routing-table called-e164 RT_FROM_NET
    route default dest-service HG_TO_USR

  interface isdn IF_ISDN_S00
    route call dest-table RT_FROM_NET
    isdn-date-time

  interface isdn IF_ISDN_S01
    route call dest-table RT_DIGIT_COLL
    call-reroute accept
    no call-waiting
    network-type user
    isdn-date-time

  interface isdn IF_ISDN_S02
    route call dest-table RT_DIGIT_COLL
    call-reroute accept
    no call-waiting
    network-type user
    isdn-date-time

  interface isdn IF_ISDN_S03
    route call dest-table RT_DIGIT_COLL
    call-reroute accept
    no call-waiting
    network-type user
    isdn-date-time

  interface isdn IF_ISDN_S04
    route call dest-table RT_DIGIT_COLL
    call-reroute accept
    no call-waiting
    network-type user
    isdn-date-time

  interface sip IF_SIP_DEFAULT
    bind context sip-gateway SIP_WAN
    route call dest-service HG_TO_USR
#    remote [registrar IP address or domain name]

  interface sip IF_SIP_LAN
    bind context sip-gateway SIP_LAN
    route call dest-interface IF_SIP_DEFAULT
    remote 192.168.20.2
    local 192.168.20.2

  service hunt-group HG_TO_USR
    allows-push-back
    drop-cause normal-unspecified
    drop-cause no-circuit-channel-available
    drop-cause network-out-of-order
    drop-cause temporary-failure
    drop-cause switching-equipment-congestion
    drop-cause access-info-discarded
    drop-cause circuit-channel-not-available
    drop-cause resources-unavailable
    drop-cause destination-out-of-order
    unavailable drop user-busy
    route call 1 dest-interface IF_ISDN_S01
    route call 2 dest-interface IF_ISDN_S02
    route call 2 dest-interface IF_ISDN_S03
    route call 2 dest-interface IF_ISDN_S04
    route call 3 dest-interface IF_SIP_LAN

context cs switch
  no shutdown

authentication-service AUTH_DEF
# Enter below the username and passwort you got by VOIP provider
  username [XXX] password [YYY]

location-service LOC_DEF
# The line below requires the VOIP Providers domain name
  domain 1 [registrar IP or domain]

  identity-group default

    authentication outbound
# Replace the XXX with the username of Authentication service
      authenticate 1 authentication-service AUTH_DEF username [XXX]

    registration outbound
# Set the Registrar IP or domainname of VOIP provider
      registrar [registrar address] 5060
      register auto

# Set the right username while replacing the XXX
  identity [XXX] inherits default

context sip-gateway SIP_WAN

  interface GW_SIP_WAN
    bind interface IF_WAN context router port 5060

context sip-gateway SIP_WAN
  bind location-service LOC_DEF
  no shutdown

context sip-gateway SIP_LAN

  interface GW_SIP_LAN
    bind interface IF_LAN_VOIP context router port 5060

context sip-gateway SIP_LAN
  no shutdown

port ethernet 0 0
  medium auto
  encapsulation ip
  bind interface IF_WAN router
  no shutdown

port ethernet 0 1
  medium auto
  encapsulation ip
  bind interface IF_LAN_VOIP router
  no shutdown

port bri 0 0
  clock auto
  encapsulation q921

  q921
    permanent-layer2
    protocol pp
    uni-side auto
    encapsulation q931

    q931
      protocol dss1
      uni-side user
      bchan-number-order ascending
      encapsulation cc-isdn
      bind interface IF_ISDN_S00 switch

port bri 0 0
  no shutdown

port bri 0 1
  clock auto
  encapsulation q921

  q921
    permanent-layer2
    protocol pp
    uni-side auto
    encapsulation q931

    q931
      protocol dss1
      uni-side net
      bchan-number-order ascending
      encapsulation cc-isdn
      bind interface IF_ISDN_S01 switch

port bri 0 1
  no shutdown

port bri 0 2
  clock auto
  encapsulation q921

  q921
    permanent-layer2
    protocol pp
    uni-side auto
    encapsulation q931

    q931
      protocol dss1
      uni-side net
      bchan-number-order ascending
      encapsulation cc-isdn
      bind interface IF_ISDN_S02 switch

port bri 0 2
  no shutdown

port bri 0 3
  clock auto
  encapsulation q921

  q921
    permanent-layer2
    protocol pp
    uni-side auto
    encapsulation q931

    q931
      protocol dss1
      uni-side net
      bchan-number-order ascending
      encapsulation cc-isdn
      bind interface IF_ISDN_S03 switch

port bri 0 3
  no shutdown
 
port bri 0 4
  clock auto
  encapsulation q921

  q921
    permanent-layer2
    protocol pp
    uni-side auto
    encapsulation q931

    q931
      protocol dss1
      uni-side net
      bchan-number-order ascending
      encapsulation cc-isdn
      bind interface IF_ISDN_S03 switch

port bri 0 4
  no shutdown
-------------------------------------------------
SLAVE SN46XX
#----------------------------------------------------------------#
#                                                                #
# SN4634 SLAVE                                                   #
# R5.T                                                           #
# 2010-05-12                                                     #
# Author M. Aeberhard                                            #
#                                                                #
#----------------------------------------------------------------#

cli version 3.20
banner
# enter below the DNS server IP
dns-client server [dns-serverIP]
dns-relay
webserver port 80 language en
sntp-client
sntp-client server primary swisstime.ethz.ch port 123 version 4
system hostname SLAVE_SN

system

  ic voice 0
    low-bitrate-codec g729

system
  clock-source 1 bri 0 0


profile napt NAPT_WAN

profile ppp default

profile tone-set default

profile voip default
  codec 1 g711alaw64k rx-length 20 tx-length 20
  codec 2 g711ulaw64k rx-length 20 tx-length 20
  fax transmission 1 relay t38-udp
  modem transmission 1 bypass g711alaw64k
  modem bypass-method nse


profile pstn default

profile sip default

profile dhcp-server DHCP_LAN
  network 192.168.1.0 255.255.255.0
  include 1 192.168.1.33 192.168.1.64
  lease 1 days
  default-router 1 192.168.1.1
  domain-name-server 1 192.168.1.1

profile aaa default
  method 1 local
  method 2 none

context ip router

  interface IF_WAN
    ipaddress 192.168.20.2 255.255.255.0
    use profile napt NAPT_WAN

  interface IF_LAN
    ipaddress 192.168.1.1 255.255.255.0

context ip router
  dhcp-server use profile DHCP_LAN
  route 0.0.0.0 0.0.0.0 192.168.20.1 0

context cs switch

  routing-table called-e164 RT_DIGIT_COLL
    route .T dest-interface IF_SIP_DEFAULT

  routing-table called-e164 RT_FROM_NET
    route default dest-service HG_TO_USR

  interface isdn IF_ISDN_S00
    route call dest-table RT_FROM_NET
    network-type user
    isdn-date-time

  interface isdn IF_ISDN_S01
    route call dest-table RT_DIGIT_COLL
    call-reroute accept
    no call-waiting
    network-type user
    isdn-date-time

  interface isdn IF_ISDN_S02
    route call dest-table RT_DIGIT_COLL
    call-reroute accept
    no call-waiting
    network-type user
    isdn-date-time

  interface sip IF_SIP_DEFAULT
    bind context sip-gateway sip
    route call dest-table RT_FROM_NET
    remote 192.168.20.1
    local 192.168.20.1

  service hunt-group HG_TO_USR
    drop-cause normal-unspecified
    drop-cause no-circuit-channel-available
    drop-cause network-out-of-order
    drop-cause temporary-failure
    drop-cause switching-equipment-congestion
    drop-cause access-info-discarded
    drop-cause circuit-channel-not-available
    drop-cause resources-unavailable
    drop-cause destination-out-of-order
    unavailable drop user-busy
    route call 1 dest-interface IF_ISDN_S01
    route call 2 dest-interface IF_ISDN_S02

context cs switch
  no shutdown

context sip-gateway sip

  interface GW_SIP_WAN
    bind interface IF_WAN context router port 5060

context sip-gateway sip
  bind location-service LOC_DEF
  no shutdown

port ethernet 0 0
  medium auto
  encapsulation ip
  bind interface IF_WAN router
  no shutdown

port ethernet 0 1
  medium auto
  encapsulation ip
  bind interface IF_LAN router
  no shutdown

port bri 0 0
  clock slave
  encapsulation q921

  q921
    permanent-layer2
    protocol pp
    uni-side auto
    encapsulation q931

    q931
      protocol dss1
      uni-side user
      bchan-number-order ascending
      encapsulation cc-isdn
      bind interface IF_ISDN_S00 switch

port bri 0 0
  no shutdown

port bri 0 1
  clock auto
  encapsulation q921

  q921
    permanent-layer2
    protocol pp
    uni-side auto
    encapsulation q931

    q931
      protocol dss1
      uni-side net
      bchan-number-order ascending
      encapsulation cc-isdn
      bind interface IF_ISDN_S01 switch

port bri 0 1
  no shutdown

port bri 0 2
  clock auto
  encapsulation q921

  q921
    permanent-layer2
    protocol pp
    uni-side auto
    encapsulation q931

    q931
      protocol dss1
      uni-side net
      bchan-number-order ascending
      encapsulation cc-isdn
      bind interface IF_ISDN_S02 switch

port bri 0 2
  no shutdown