Hardware Specifications


Vendor/Brand	Genexis FiberTwist
Model	G2110C-2.5G
Chipset	Realtek RTL9601D
Flash	128MB
RAM	32MB
System	Linux 3.18 (Luna SDK 3.3)
2.5GBaseT	Yes
Optics	SC/APC
IP address	192.168.100.1/24 or 192.168.1.1/24
Web Gui	Can be enabled, locked down by iptables rule and missing CSS
SSH
Telnet	✅ user `company`, password `amyM77yY`
Serial	✅
Serial baud	115200
Serial encoding	8-N-1
Form Factor	ONT

Optical Header installation backplate

Serial

The ONT has a TTL 3.3v UART console (configured as 115200 8-N-1) that can be accessed from the top surface. To accept TX line commands, the GND of the TTL adapter should be attached to the ONT’s shield:

Note Some USB TTL adapters label TX and RX pins the other way around: try to swap them if the connection doesn’t work.

List of software versions

C-5.6.1-R
C-5.7.0-R
C-5.7.1-DEV3
C-5.7.1-EFT1

List of partitions

dev	size	erasesize	name
mtd0	00040000	00001000	“boot”
mtd1	00002000	00001000	“env”
mtd2	00002000	00001000	“env2”
mtd3	0003c000	00001000	“config”
mtd4	00300000	00001000	“k0”
mtd5	004c0000	00001000	“r0”
mtd6	00300000	00001000	“k1”
mtd7	004c0000	00001000	“r1”
mtd8	00001000	00001000	“Partition_008”
mtd9	00001000	00001000	“Partition_009”
mtd10	00001000	00001000	“Partition_010”
mtd11	00001000	00001000	“Partition_011”
mtd12	00300000	00001000	“linux”
mtd13	004c0000	00001000	“rootfs”

This ONT supports dual boot.

k0 and r0 respectively contain the kernel and firmware of the first image, k1 and r1 the kernel and the firmware of the second one

GPON/OMCI settings

Info Some variables are write-protected, you need to unlock them before proceed

Use the following command to unlock write-protected variables:

# nv setenv ProtectEnv 0

Getting/Setting ONU GPON Serial Number

Info If your serial number has letters after the Vendor ID (e.g. ZTEGAAA01234), put them in lower case (e.g. ZTEGaaa01234)

# nv setenv GponSn ZTEGaaa01234

Reboot the ONT to apply any changes

You can check if the serial number was correclty changed using the following command:

# diag gpon get serialnumber
ZTEGaaa01234

Getting/Setting ONU GPON PLOAM password

Info The PLOAM password is stored in ASCII format

# /etc/scripts/flash get GPON_PLOAM_PASSWD
GPON_PLOAM_PASSWD=AAAAAAAAAA
# /etc/scripts/flash set GPON_PLOAM_PASSWD AAAAAAAAAA

Looks like Genexis has also included an U-Boot variable to store the PLOAM. On currently known firmwares (5.6.1 and 5.7.0) it is not read by the omci_app daemon. If you want to be future proof, put your PLOAM also on U-Boot env using the following command in the OS shell:

# nv setenv ploampwd 1234567890
ploampwd=1234567890

Setting OMCI software version (ME 7)

The stock firware does not allow changing of the primary and standby software version. Since the ONT uses the Luna SDK, the /etc/scripts/flash shell script can be easily modified by creating a custom firmware with the same set of patches suggested e.g. for the Technicolor AFM0002 ONT.

You can then check if the software version was correctly changed with this command (take a look at the Version field):

# omcicli mib get 7
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
SWImage
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
=================================
EntityID: 0x00
Active: 0
Committed: 0
Valid: 1
*Version: V6.0.10N14*
ProductCode:
ImageHash: 0x00000000000000000000000000000000
=================================
=================================
EntityID: 0x01
Active: 1
Committed: 1
Valid: 1
*Version: V6.0.10N14*
ProductCode:
ImageHash: 0x00000000000000000000000000000000
=================================

Setting OMCI hardware version (ME 256)

# nv setenv HV G2110CE2V1D0

Reboot ONT to apply the change

Setting OMCI equipment ID (ME 257)

# nv setenv ProdName FT-G2110C-2.5G

Reboot ONT to apply the change

Advanced settings

Setting management IP

# /etc/scripts/flash get LAN_IP_ADDR
LAN_IP_ADDR=192.168.1.1
# /etc/scripts/flash set LAN_IP_ADDR 192.168.1.1

Known Bugs

Web UI can be enabled by modding the firmware, but without an attached fiber the daemon will crash

Miscellaneous Links

FiberTwist G2110C-2.5G