Can the E1-F card of an AR router interconnect with a CPOS card

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A CPOS interface and an E1 interface can be connected in the following two methods but cannot be directly connected.
CPOS interfaces are channelized POS interfaces which are mainly used to improve the capability of devices in aggregating lower-speed E1 links. Currently, a CPOS interface supports a bandwidth of 155 Mbit/s.
1. All E1 links are aggregated through the SONET/SDH transport networks to the CPOS interface of the router of the regional department. In this case, the CPOS interface and the E1 interface are indirectly connected.
2. The CPOS interface is connected to E1/T1 lines through a CPOS protocol converter.

Other related questions:
Can an E1-F card interconnect with an E1-M card
An E1-F card can interconnect with an E1-M card in the following scenarios: - The E1-M card works in E1 mode and the E1-F card works in unframed mode. - The E1-M card works in CE1 mode and the E1-F card works in framed mode. In addition, the E1-M card creates only one channel set, and the timeslots that are bound to the channel on the E1-M card are the same as those on the E1-F card.

Interconnection of the E1 card of AR routers
Methods of connecting the E1 interface of an AR router to other devices using cables are described as follows: Devices of operators provide the BNC connector in general while AR routers provide the DB9 female connector (cards with 1 interface or 2 interfaces) or the RJ45 connector (cards with 4 or 8 interfaces). The connection methods are as follows: - BNC connectors of operators' devices -- connectors of coaxial cables -- (BNC connector on the customer end -- E1 cables -- DB9 male connectors) -- DB9 female connectors of routers - BNC connectors of operators' devices -- connectors of coaxial cables -- (BNC connector on the customer end -- E1 cables -- RJ45 connectors) -- RJ45 connectors of routers Cables with BNC and DB9/RJ45 connectors are used.

Can the E1-F card communicate with the E1-M card
The E1-F card can communicate with the E1-M card in the following scenarios: -The E1-M card works in E1 mode and the E1-F card works in unframed mode. -The E1-M card works in CE1 mode and the E1-F card works in framed mode. Only one channel set is created on the E1-M card and binds the same timeslots as the E1-F card.

An AR router cannot discover the E1 card
The E1 card of the AR router is not registered. 1. Check whether the card is still in the startup process. - The startup time of an SRU is within 3 minutes. In scenarios where the card is restarted after the system software is updated, the startup time of the card is within 5 minutes. - The startup time of an interface card is within 5 minutes. In scenarios where the system software needs to be updated, the startup time of the card is within 10 minutes. 2. If a card does not start up within the normal startup time, run the display device command to check the status of the card. - If the status of the card displayed under the Register field of the displayed output information is Unregistered, the card is not registered. In this case, check whether the card is reset. - Run the display reset-reason [ slot slot-id ] command in the diagnosis view. a. If no reset information about the card is displayed, the card has never been registered. In this case, pull out the card and insert it again. b. If reset causes of the card are displayed, resolve the reset problems of the card based on the displayed causes.

How to AR routers support E1/T1 cards
E1/T1 cards that AR routers support are described as follows: 1. 1E1T1-M/2E1T1-M/4E1T1-M/8E1T1-M equipped with 1 interface or /2/4/8 interfaces support the switching use of E1 and T1. Cards equipped with 4 or 8 interfaces do not support T1 currently. - Cards equipped with 1 interface or 2 interfaces use the DB9 female connector interface and support E1/CE1/CT1/PRI(E1&T1) modes. - Cards equipped with 4/8 interfaces use the RJ45 interface and support E1/CE1/PRI(E1) modes. 2. 1E1T1-F/2E1T1-F/4E1T1-F/8E1T1-F equipped with 1 interface or /2/4/8 interfaces support the switching use of E1 and T1. Cards equipped with 4 or 8 interfaces do not support T1 currently. - Cards equipped with 1 interface or 2 interfaces use the DB9 female connector interface and support E1 (framed and unframed) and T1 modes. - Cards equipped with 4/8 interfaces use the RJ45 interface and support E1 (framed and unframed) mode. 3. 4E1-IMA, which is used on ATM networks, demultiplexes an aggregate ATM cell flow into multiple lower-speed E1 links, and multiplexes the E1 links on the far end to restore the original aggregate ATM cell flow.

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