Version 1 - History - ISDN POTS V5 Event Configuration - Retronetworking - Open Source Mobile Communications

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laforge

h1. ISDN POTS V5 Event Configuration

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This page documents the configuration of our ISDN/POTS V5 access network for evens like the [[ISDN_at_CCC_Camp_2023]]

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h2. Nokia EKSOS wooden racks

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We currently have 3 setups using NOKIA EKSOS N20 racks.  They contain:

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* Nokia EKSOS N20 shelf

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** NCU (main CPU card) with V5/E1 and Q3/Ethernet interfaces

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** any number of PSTN + ISDN BRI line cards (PSTN: 32 ports per card, ISDN: 16 ports per card)

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** home-made unit for N20 shelf containing

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*** nanopi R5S as Linux SoM

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**** LAN1 port used for Q3 to NCU

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**** WAN port used for uplink/back-haul\

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**** special re-work applied internally to power the R5S from 12V DC without any USB-PD logic

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*** icE1usb as USB-E1 interface towards the NCU

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* 48V power supply (trimmed up to ~ 52V) for N20 shelf

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* 12V power supply for fans + nanopi R5S

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* 3x 120mm fan (1200 rpm) 12V mounted above N20 rack, airflow in upwards direction

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* 50-port ISDN patch panel configured as

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** ports 1-16: first 16 ports of PSTN card in slot U3

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** ports 17-32: first 16 ports of PSTN card in slot U5

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** ports 33-48: ISDN line card in slot U7

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** ports 49-50: unused

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h3. nanoPi R5S configuration

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The nanoPI R5S is configured as follows:

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* Plain Debian 12 installation using https://github.com/inindev/nanopi-r5

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* osmo-e1d package from osmocom:nightly feed

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** octoi client to connect to remote octoi server

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* network config

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** DHCP on the @wan@ port (back-haul/uplink)

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** software-bridging (@q3br@) between @lan1@ and a @q3vx@ VXLAN device using group 3 on multicast group 239.1.1.1 on the @wan@ port

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** static IP on the @lan22 port (local admin port)

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h2. Siemens Fastlink

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TBD

Retronetworking