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+---
+title: ONT FS.com Generic Compatible XGSPON Stick ONU with MAC SFP+ (XGS-ONU-25-20NI)
+has_children: true
+layout: default
+parent: ONT FS.com
+---
+
+# Hardware Specifications
+
+|                  |                                                                            |
+| ---------------- | -------------------------------------------------------------------------- |
+| Vendor/Brand     | FS                                                                         |
+| Model            | XGS-ONU-25-20NI                                                            |
+| ODM              | CIG                                                                        |
+| ODM Product Code | XG-99S                                                                     |
+| Chipset          | Cortina CA8271A                                                            |
+| Flash            | MX35LF1GE4AB 128MB                                                         |
+| RAM              | 128MB                                                                      |
+| CPU              | Taroko V0.2 (MIPS)                                                         |
+| CPU Clock        | 500MHz                                                                     |
+| Bootloader       | SATURN uboot                                                               |
+| System           | Custom Linux by Cortina (Saturn SDK) based on Kernel 4.4 Saturn-sfpplus-r1 |
+| 2.5GBaseX        | Yes                                                                        |
+| XGMII/XSGMII     | Yes                                                                        |
+| Optics           | SC/APC                                                                     |
+| IP address       | 192.168.100.1                                                              |
+| Web Gui          |                                                                            |
+| SSH              | No                                                                         |
+| Telnet           | ✅                                                                        |
+| Serial           | ✅                                                                        |
+| Serial baud      | 115200                                                                     |
+| Serial encoding  | 8-N-1                                                                      |
+| Form Factor      | miniONT SFP                                                                |
+
+{% include image.html file="XGS-ONU-25-20NI/front.jpg" alt="XGS-ONU-25-20NI front plate" caption="XGS-ONU-25-20NI front plate" %}
+{% include image.html file="XGS-ONU-25-20NI/internal.jpg" alt="XGS-ONU-25-20NI internal" caption="XGS-ONU-25-20NI internal layout" %}
+
+## Serial
+
+The stick has a TTL 3.3V UART console (configured as 115200 8-N-1) that can be accessed from the SFP connector, but no components are mounted.
+
+The UART can be accessed by any of the following methods.
+- Touch the needle to a specific point
+- Shorting a specific pad to access from SFP
+
+### Access from PCB
+The UART can be accessed by connecting a wire or touching a needle to the following points.
+
+{% include image.html file="XGS-ONU-25-20NI/UART_needle.png" alt="XGS-ONU-25-20NI UART Touch point" caption="XGS-ONU-25-20NI UART Touch point" %}
+
+### Access from SFP
+By shorting these two points with solder, you can access the UART from SFP pins 2 and 7.
+
+| USB - TTL Adapter     | SFP Connector (Molex, etc) |
+| --------------------- | -------------------------- |
+| Vcc (3.3V)            | pin #15 , #16              |
+| TX                    | pin #7                     |
+| RX                    | pin #2                     |
+| GND                   | pin #10                    |
+
+{% include alert.html content="USB TTL adapter may not work due to insufficient power supply. If possible, obtain 3.3V from the power supply device instead of the USB TTL adapter." alert="Note"  icon="svg-info" color="blue" %}
+
+{% include image.html file="XGS-ONU-25-20NI/UART_SFP.png" alt="XGS-ONU-25-20NI UART Short point" caption="XGS-ONU-25-20NI UART Short point" %}
+
+{% include image.html file="XGS-ONU-25-20NI/UART_bridge.png" alt="XGS-ONU-25-20NI UART solder bridge" caption="XGS-ONU-25-20NI UART solder bridge" %}
+
+## Firmware is interchangeable with
+The firmware is compatible with the following.
+- CIG XG-99S
+- CIG XE-99S (10G-EPON mode)
+- ECIN EN-XGSFPP-OMAC v1
+
+## List of software versions
+Available from `#ONT/system>ontver build` and `#ONT/system/shell>cat /etc/version`.
+- R4.4.20.016 (from FS.com docs)
+- R4.4.20.018 - 20230426061821
+- R4.4.20.022 - 20230612033149
+
+## List of partitions
+
+| dev    | size     | erasesize | name              |
+| ------ | -------- | --------- | ----------------- |
+| mtd0   | 00040000 | 00020000  | "ssb"             |
+| mtd1   | 00002000 | 00020000  | "uboot-env"       |
+| mtd2   | 00002000 | 00020000  | "dtb0"            |
+| mtd3   | 0003c000 | 00020000  | "kernel0"         |
+| mtd4   | 00300000 | 00020000  | "rootfs0"         |
+| mtd5   | 004c0000 | 00020000  | "dtb1"            |
+| mtd6   | 00300000 | 00020000  | "kernel1"         |
+| mtd7   | 004c0000 | 00020000  | "rootfs1"         |
+| mtd8   | 00001000 | 00020000  | "userdata"        |
+| mtd9   | 00001000 | 00020000  | "mfginfo1"        |
+| mtd10  | 00001000 | 00020000  | "mfginfo2"        |
+| mtd11  | 00001000 | 00020000  | "uboot-env2"      |
+
+This ONT supports dual boot. 
+
+`kernel0` and `rootfs0` respectively contain the kernel and firmware of the first image, `kernel1` and `rootfs1` the kernel and the firmware of the second one.
+
+# Useful files and binaries
+
+## scfg.txt
+In the XGS-ONU-25-20NI ONT, the settings are loaded by four `scfg.txt` files.
+For rewriting settings, `/userdata/scfg.txt` and `/tmp/scfg.txt` are used.
+
+- `/config/default_scfg.txt`  (read only): Contains the manufacturer's default settings, which are read first at ONT startup and are the lowest priority settings.
+- `/config/scfg.txt`  (read only): Contains settings set by the firmware creator, which have higher priority than `default_scfg.txt` and will overwrite the settings if there is a conflict.
+- `/userdata/scfg.txt` (read/write): Contains settings set by the user or ISP. It has a higher priority than `/config/scfg.txt` and will overwrite the settings if there is a conflict. Can be edited and saved.
+- `/tmp/scfg.txt` (temp): It contains dynamically generated settings based on values stored on its custom ROM (mtd9, mtd10). Since they are generated on tmpfs and cannot be saved directly, they are rewritten via the `#ONT> system/misc` command on the ONT.
+
+The settings are overwritten and loaded at startup with the following priority:
+
+***(High)*** `/tmp/scfg.txt` > `/userdata/scfg.txt` > `/config/scfg.txt` > `/config/default_scfg.txt` ***(Low)***
+
+## Misc Command
+To configure settings using the MISC command, execute the following command:
+```
+#ONT> system/misc
+#ONT/system/misc>
+```
+
+
+# Usage
+
+## Login and Enable
+
+This stick does not have a web GUI.
+To configure it, you must log in via `UART` or `Telnet`.
+
+{% include alert.html content="FS.com Stick XGS-ONU-25-20NI does not have PON S/N on the label. (The S/N field stamped on the label is FS.com internal S/N, not PON S/N). In order to get it, you can either ask an FS.com sales representative or check the boot log from the UART!" alert="Note"  icon="svg-info" color="blue" %}
+
+| User                     | Password (Enable Password)                                  |
+| ------------------------ | ----------------------------------------------------------- |
+| ONU GPON Serial Number   | 8 digit HMAC-MD5 based on Uppercase ONU GPON Serial Number  |
+
+You can use the following form to generate login credentials:
+
+{% include cig_password_xgspon.html password_len="8" %}
+
+Or you can follow this external documentation on how to [emulate the ONT in QEMU](https://github.com/YuukiJapanTech/CA8271x), so use it at your own risk.
+
+UART does not ask for a login, it is possible to get a root shell without knowing the password.
+
+## Root procedure
+After logging in via `telnet` or `UART`, you will first get the MiniShell with user privileges.
+```
+ONT>
+```
+
+The root MiniShell can be obtained by executing the `enable` command on this MiniShell.
+```
+ONT> enable
+#ONT>
+```
+
+You can then switch to the Linux root shell by executing the following command:
+
+```
+#ONT> system/shell
+#ONT/system/Shell> sh
+#
+```
+
+
+# GPON ONU status
+
+## Get the operational status of the ONU
+Check the ONU Registration State with the following command:
+
+```
+#ONT> traffic/pon/show onu
+
+------------------------- ONU INFO --------------------------
+
+Onu id 65535
+sdThreshold:   0
+sfThreshold:   0
+TO1:   80000
+TO2:   1
+eqd:   0
+Serial Number(vendor code): GPON
+Serial Number(sn):          abcd1234
+Password:                   30 31 32 33 34 353 36 37 38 39
+Registration ID:           0x44454641554c540000000000000000000000000000000000000000000000000000000000
+------------------------- INFO END --------------------------
+
+#ONT> 
+```
+
+Check the ONU operation state with the following command:
+
+```
+#ONT>traffic/pon/show link
+
+ ----------------- LINK STATE -----------------
+ Operation State Machine: INIT (O1)
+ ----------------- STATE  END -----------------
+
+#ONT>
+```
+
+## Get information of the OLT vendor
+OLT information can be extracted from the MIB with the following command:
+
+```
+#ONT>system/mib/show 131
+Table Oltg, Olt-g, total 1 instances
+
+EntityID                  = 0x0000
+VendorId                  = ""
+EquipmentId               = ""
+Version                   = 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+TimeOfDay                 = 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+
+#ONT>
+```
+
+## Querying a particular OMCI ME
+You can browse the MIB with the following command:
+```
+#ONT> system/mib
+#ONT/system/mib> 
+```
+
+### Show a list of MIBs supported by ONT
+
+```
+#ONT/system/mib> show
+This command prints out the content of a mib table.
+Usage: show CLASSID
+CLASSID:
+      the class ID of the ME, defined in 983.2/984.4, currently
+the following MEs are supported:
+ClassID  Name            Desc
+256      Ontg            Ont-g
+etc...
+```
+
+### Show a specific MIB
+For example, to display MIB 256 (Ont-g):
+
+```
+#ONT/system/mib>show 256
+Table Ontg, Ont-g, total 1 instances
+
+EntityID                  = 0x0000
+VID                       = "GPON"
+Version                   = 58 47 2d 39 39 53 00 00 00 00 00 00 00 00
+SerialNum                 = 47 50 4f 4e ab cd 12 34
+TraffMgtOpt               = 2
+AtmCCOpt                  = 0
+BatteryBack               = 1
+AdminState                = 0
+OpState                   = 0
+OnuSurvivalTime           = 0
+Loid                      = ""
+Password                  = ""
+AuthState                 = 0
+OntState                  = 1
+
+#ONT/system/mib>
+```
+
+### Dump of a MIB
+Output a dump of mib to `/tmp/mibdump.txt`
+```
+#ONT/system/mib> dump
+MIB is saved to the file /tmp/mibdump.txt.
+#ONT/system/mib>
+```
+
+## Getting Speed LAN Mode
+LAN Speed Mode can be verified from the `Status` column displayed by the following command:
+
+```
+#ONT>traffic/eth/show pack
+
+build time Apr 26 2023: 06:23:15
+
+-------------------- Line Pack -- PWR 0X0      --
+Line Slot 10, NumOfPorts 1, type 49, subtype 75, state 2
+-------------------- Configuration -------------------
+port | enable | loop | Mode | RL Type | RL Us Rate| RL Ds Rate|
+1       Yes     No      Auto            0       0       0
+
+-------------------- Status -------------------
+1) link state: Up, link mode: 2.5G Full
+
+-------------------- Bridge Pack -------------------
+Type:       75
+State:      2
+MAC Table:  0
+MAC Aging:  0
+MTU:        0
+-------------------- Chip Data -------------------
+eth Fd:         7
+port Mask:      0x0018
+type            28
+
+********** DEBUG INFO **********
+                 EmrLogId  : 5
+               EmrAdminEn  : 0
+              EmrbeInited  : 1
+              EmrDumpConn  : 0
+             EmrPwrShedEn  : 0x0
+           EmrConnItemNum  : 0
+         EmrUsDsReverseEn  : 1
+       EmrConnAllVidCheck  : 0
+      EmrMcastGemVlanOpEn  : 1
+       gEmrSaveConnItemEn  : 1
+      gEmrMcastCrossVlanEn : 1
+    EmrUniExtractPriMatch  : 1
+ EMR_DRV_PACK_DUMP_ITEM_EN : 0
+********************************
+#ONT>
+```
+
+
+# GPON/OMCI settings
+XGS-ONU-25-20NI ONT uses `scfg.txt` file and misc command for configuration.
+
+## Getting/Setting ONU GPON Serial Number
+This setting must be changed with the `misc` CLI option and the `eqsn set "<serialnumber>"` command.
+For example, if the SN is like `GPONabcd1234` (`47504f4eabcd1234`):
+```
+#ONT/system/misc> eqsn set "GPONabcd1234"
+```
+
+The get command can also be used to retrieve the configured PON S/N.
+```
+#ONT/system/misc> eqsn get
+eqsn: GPONabcd1234
+```
+
+## Getting/Setting ONU GPON PLOAM password
+This setting must be changed with the `misc` CLI option and the `exeep_w8 "<password>"` command.
+For example, if the PLOAM password is like `0123456789`:
+```
+#ONT/system/misc> exeep_w8 "0123456789"
+```
+
+The `exeep_r8` command can also be used to retrieve the configured PLOAM password.
+
+```
+#ONT/system/misc> exeep_r8
+[00, 000] 44 45 46 41 55 4c 54 00 - 00 00 00 00 00 00 00 00     |  DEFAULT......
+[10, 016] 00 00 00 00 00 00 00 00 - 00 00 00 00 00 00 00 00     |  .............
+[20, 032] 00 00 00 00 ff ff ff ff - ff ff ff ff ff ff ff ff     |  .............
+[30, 048] ff ff ff ff ff ff ff ff - ff ff ff ff ff ff ff ff     |  .............
+[40, 064] ff ff ff ff ff ff ff ff - ff ff ff ff ff ff ff ff     |  .............
+[50, 080] ff ff ff ff ff ff ff ff - ff ff ff ff ff ff ff ff     |  .............
+[60, 096] ff ff ff ff ff ff ff ff - ff ff ff ff ff ff ff ff     |  .............
+[70, 112] ff ff ff ff ff ff ff ff - ff ff ff ff ff ff ff ff     |  .............
+[80, 128] ff ff ff ff ff ff ff ff - ff ff ff ff ff ff ff ff     |  .............
+[90, 144] ff ff ff ff ff ff ff ff - ff ff ff ff ff ff ff ff     |  .............
+[a0, 160] ff ff ff ff ff ff ff ff - ff ff ff ff ff ff ff ff     |  .............
+[b0, 176] ff ff ff ff ff ff ff ff - ff ff ff ff ff ff ff ff     |  .............
+[c0, 192] ff ff ff ff ff ff ff ff - ff ff ff ff ff ff ff ff     |  .............
+[d0, 208] ff ff ff ff ff ff ff ff - ff ff ff ff ff ff ff ff     |  .............
+[e0, 224] ff ff ff ff ff ff ff ff - ff ff ff ff ff ff ff ff     |  .............
+[f0, 240] ff ff ff ff ff ff ff ff - ff ff ff ff 15 91 f3 9f     |  ............k
+```
+
+## Getting/Setting ONU GPON LOID
+This setting must be changed in `scfg.txt`, using the key `CHAR-ARRAY CFG_ID_LOID`. 
+To modify LOID username we add the following line to `/userdata/scfg.txt`:
+```
+CHAR-ARRAY CFG_ID_LOID = { 0xXX,0xXX,0xXX,0xXX, 0xXX,0xXX,0xXX,0xXX, 0xXX,0xXX,0xXX,0xXX, 0xXX,0xXX,0xXX,0xXX, 0xXX,0xXX,0xXX,0xXX, 0xXX,0xXX,0xXX,0xXX };
+```
+
+For example, if the LOID is like `0123456`:
+```
+CHAR-ARRAY CFG_ID_LOID = { 0x30,0x31,0x32,0x33, 0x34,0x35,0x36,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00 };
+```
+
+## Getting/Setting ONU GPON LOID password
+This setting must be changed with the `misc` CLI option and the `pon_passwd set <password>` command.
+For example, if the LOID password is like `0123456789`:
+```
+#ONT/system/misc> pon_passwd set 0123456789
+```
+
+The `get` option can also be used to retrieve the configured LOID password:
+```
+#ONT/system/misc> pon_passwd get
+eqsn: 01234567890000000000
+```
+
+## Getting/Setting OMCI hardware version (ME 256)
+This setting must be changed with the `misc` CLI option and the `eqvid set "<hwver>"` command.
+For example, if the hardware version is like `abc123`:
+```
+#ONT/system/misc> eqvid set "abc123"
+```
+
+The `get` option can also be used to retrieve the configured hardware version.
+```
+#ONT/system/misc> eqvid get
+eqvid: abc123
+```
+
+## Getting/Setting OMCI vendor ID (ME 256)
+This setting must be changed with the `misc` CLI option and the `vendor set "<vendor>"` command.
+For example, if the vendor is like `GPON`:
+```
+#ONT/system/misc> vendor set "GPON"
+```
+
+The `get` option can also be used to retrieve the configured PON S/N vendor field:
+```
+#ONT/system/misc> vendor get
+vendor: GPON
+```
+
+In this ONT, the MIB OntG Vendor can be set to a value different from the S/N vendor value:
+```
+#ONT/system/misc> eqsn get
+eqsn: GPONabcd1234
+#ONT/system/misc> vendor get
+vendor: ZTEG
+```
+
+
+# Advanced settings
+See the link below for other MiniShell commands.
+- [MiniShell command tree](/xgs/ont-fs-XGS-ONU-25-20NI-cli)
+
+## Transferring files to the stick
+Stick's busybox (Linux shell) supports netcat and TFTP, which allow to send and receive files:
+```
+# tar cf - localfile | nc remotehost-ip 10000
+```
+
+```
+# tftp -r remotefile.bin -g remotehost-ip
+```
+
+## Backup of all partition
+To obtain a backup, use the `dd` command to save it on `/tmp`,
+or use the `cat` command to transfer it via netcat.
+```
+# dd if=/dev/mtdX of=/tmp/mtdX.bin
+# tftp -l /tmp/mtdX.bin -r remotehost-ip
+```
+
+```
+# cat /dev/mtdX | nc remotehost-ip 10000
+```
+
+When partition writing to the stick, use the flash command set.
+(Do not write with the `dd` command because ECC is enabled).
+```
+# flash_eraseall /dev/mtdX
+# flashcp -v targetfile /dev/mtdX
+```
+
+## Setting management IP
+To change the management IP, set it with the `misc` CLI option and the `admin_ip set <ip>` command.
+For example, if the management IP is like `192.168.1.1`:
+```
+#ONT/system/misc> admin_ip set 192.168.1.1
+```
+
+To change the management IP netmask, set it with the `misc` CLI option and the `admin_mask set <netmask>` command.
+For example, if the management IP mask is like `255.255.255.0`:
+```
+#ONT/system/misc> admin_mask set 255.255.255.0
+```
+
+
+# Random notes
+
+## Bricked stick Repair
+{% include alert.html content="This is an external file ([mtd dump](https://github.com/YuukiJapanTech/CA8271x)), so use it at your own risk!" alert="Note"  icon="svg-info" color="blue" %}
+
+If the stick is bricked, it can be repaired by accessing uboot from the UART.
+
+If stick fails to boot, uboot will enable text input.
+```
+ERROR: can't get kernel image!
+SATURN#
+```
+
+Download stick's mtd dump from [mtd dump.](https://github.com/YuukiJapanTech/CA8271x/tree/main/mtd)
+
+Enable NAND with the following command:
+```
+SATURN# spi_nand probe 0
+SPI_NAND ID: 0x12c200
+SPI-NAND: MX35LF1GE4AB is found.
+MX35LF1GE4AB
+spinand_oob_size:0x40
+spinand_page_size:0x800
+spinand_blk_size:0x20000
+spinand_size:0x8000000
+SATURN#
+```
+
+Receive the file with the `loadb` command.
+```
+SATURN# loadb 0x80000000
+## Ready for binary (kermit) download to 0x80000000 at 115200 bps...
+```
+
+Using Tera Term, send the Kernel image (mtd3 or mtd6) by kermit transfer.
+{% include image.html file="XGS-ONU-25-20NI/Stick_Rep.png" alt="XGS-ONU-25-20NI Repair" caption="XGS-ONU-25-20NI Repair" %}
+
+Erase NAND and write the transferred kernel.
+```
+SATURN# spi_nand erase 0x000000600000 0x600000
+SATURN# spi_nand erase 0x000003500000 0x600000
+SATURN# spi_nand write 0x80000000 0x000000600000 0x600000
+SATURN# spi_nand write 0x80000000 0x000003500000 0x600000
+```
+
+Receive the file with the `loadb` command.
+and Using Tera Term, send the rootfs image (mtd4 or mtd7) by kermit transfer.
+```
+SATURN# loadb 0x81000000
+## Ready for binary (kermit) download to 0x81000000 at 115200 bps...
+```
+
+Erase NAND and write the transferred rootfs.
+```
+SATURN# spi_nand erase 0x000000c00000 0x2800000
+SATURN# spi_nand erase 0x000003b00000 0x2800000
+SATURN# spi_nand write 0x81000000 0x000000c00000 0x2800000
+SATURN# spi_nand write 0x81000000 0x000003b00000 0x2800000
+```
+
+When the stick is turned back on, it will boot with the transferred kernel and rootfs.
+
+
+# Known Bugs
+- There is a bug in the `register_id` command in the `misc` CLI option that changes the value of `pon_passwd` (LOID Password) instead of `register_id` (PLOAM).
+
+
+# Miscellaneous Links
+- [GitHub - CA8271x](https://github.com/YuukiJapanTech/CA8271x)
+